added neo4j and esv7 dependencies

vendor/github.com/golang/mock/LICENSE

+
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vendor/github.com/golang/mock/gomock/call.go

+// Copyright 2010 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package gomock
+
+import (
+	"fmt"
+	"reflect"
+	"strconv"
+	"strings"
+)
+
+// Call represents an expected call to a mock.
+type Call struct {
+	t TestHelper // for triggering test failures on invalid call setup
+
+	receiver   interface{}  // the receiver of the method call
+	method     string       // the name of the method
+	methodType reflect.Type // the type of the method
+	args       []Matcher    // the args
+	origin     string       // file and line number of call setup
+
+	preReqs []*Call // prerequisite calls
+
+	// Expectations
+	minCalls, maxCalls int
+
+	numCalls int // actual number made
+
+	// actions are called when this Call is called. Each action gets the args and
+	// can set the return values by returning a non-nil slice. Actions run in the
+	// order they are created.
+	actions []func([]interface{}) []interface{}
+}
+
+// newCall creates a *Call. It requires the method type in order to support
+// unexported methods.
+func newCall(t TestHelper, receiver interface{}, method string, methodType reflect.Type, args ...interface{}) *Call {
+	t.Helper()
+
+	// TODO: check arity, types.
+	margs := make([]Matcher, len(args))
+	for i, arg := range args {
+		if m, ok := arg.(Matcher); ok {
+			margs[i] = m
+		} else if arg == nil {
+			// Handle nil specially so that passing a nil interface value
+			// will match the typed nils of concrete args.
+			margs[i] = Nil()
+		} else {
+			margs[i] = Eq(arg)
+		}
+	}
+
+	origin := callerInfo(3)
+	actions := []func([]interface{}) []interface{}{func([]interface{}) []interface{} {
+		// Synthesize the zero value for each of the return args' types.
+		rets := make([]interface{}, methodType.NumOut())
+		for i := 0; i < methodType.NumOut(); i++ {
+			rets[i] = reflect.Zero(methodType.Out(i)).Interface()
+		}
+		return rets
+	}}
+	return &Call{t: t, receiver: receiver, method: method, methodType: methodType,
+		args: margs, origin: origin, minCalls: 1, maxCalls: 1, actions: actions}
+}
+
+// AnyTimes allows the expectation to be called 0 or more times
+func (c *Call) AnyTimes() *Call {
+	c.minCalls, c.maxCalls = 0, 1e8 // close enough to infinity
+	return c
+}
+
+// MinTimes requires the call to occur at least n times. If AnyTimes or MaxTimes have not been called, MinTimes also
+// sets the maximum number of calls to infinity.
+func (c *Call) MinTimes(n int) *Call {
+	c.minCalls = n
+	if c.maxCalls == 1 {
+		c.maxCalls = 1e8
+	}
+	return c
+}
+
+// MaxTimes limits the number of calls to n times. If AnyTimes or MinTimes have not been called, MaxTimes also
+// sets the minimum number of calls to 0.
+func (c *Call) MaxTimes(n int) *Call {
+	c.maxCalls = n
+	if c.minCalls == 1 {
+		c.minCalls = 0
+	}
+	return c
+}
+
+// DoAndReturn declares the action to run when the call is matched.
+// The return values from this function are returned by the mocked function.
+// It takes an interface{} argument to support n-arity functions.
+func (c *Call) DoAndReturn(f interface{}) *Call {
+	// TODO: Check arity and types here, rather than dying badly elsewhere.
+	v := reflect.ValueOf(f)
+
+	c.addAction(func(args []interface{}) []interface{} {
+		vargs := make([]reflect.Value, len(args))
+		ft := v.Type()
+		for i := 0; i < len(args); i++ {
+			if args[i] != nil {
+				vargs[i] = reflect.ValueOf(args[i])
+			} else {
+				// Use the zero value for the arg.
+				vargs[i] = reflect.Zero(ft.In(i))
+			}
+		}
+		vrets := v.Call(vargs)
+		rets := make([]interface{}, len(vrets))
+		for i, ret := range vrets {
+			rets[i] = ret.Interface()
+		}
+		return rets
+	})
+	return c
+}
+
+// Do declares the action to run when the call is matched. The function's
+// return values are ignored to retain backward compatibility. To use the
+// return values call DoAndReturn.
+// It takes an interface{} argument to support n-arity functions.
+func (c *Call) Do(f interface{}) *Call {
+	// TODO: Check arity and types here, rather than dying badly elsewhere.
+	v := reflect.ValueOf(f)
+
+	c.addAction(func(args []interface{}) []interface{} {
+		vargs := make([]reflect.Value, len(args))
+		ft := v.Type()
+		for i := 0; i < len(args); i++ {
+			if args[i] != nil {
+				vargs[i] = reflect.ValueOf(args[i])
+			} else {
+				// Use the zero value for the arg.
+				vargs[i] = reflect.Zero(ft.In(i))
+			}
+		}
+		v.Call(vargs)
+		return nil
+	})
+	return c
+}
+
+// Return declares the values to be returned by the mocked function call.
+func (c *Call) Return(rets ...interface{}) *Call {
+	c.t.Helper()
+
+	mt := c.methodType
+	if len(rets) != mt.NumOut() {
+		c.t.Fatalf("wrong number of arguments to Return for %T.%v: got %d, want %d [%s]",
+			c.receiver, c.method, len(rets), mt.NumOut(), c.origin)
+	}
+	for i, ret := range rets {
+		if got, want := reflect.TypeOf(ret), mt.Out(i); got == want {
+			// Identical types; nothing to do.
+		} else if got == nil {
+			// Nil needs special handling.
+			switch want.Kind() {
+			case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
+				// ok
+			default:
+				c.t.Fatalf("argument %d to Return for %T.%v is nil, but %v is not nillable [%s]",
+					i, c.receiver, c.method, want, c.origin)
+			}
+		} else if got.AssignableTo(want) {
+			// Assignable type relation. Make the assignment now so that the generated code
+			// can return the values with a type assertion.
+			v := reflect.New(want).Elem()
+			v.Set(reflect.ValueOf(ret))
+			rets[i] = v.Interface()
+		} else {
+			c.t.Fatalf("wrong type of argument %d to Return for %T.%v: %v is not assignable to %v [%s]",
+				i, c.receiver, c.method, got, want, c.origin)
+		}
+	}
+
+	c.addAction(func([]interface{}) []interface{} {
+		return rets
+	})
+
+	return c
+}
+
+// Times declares the exact number of times a function call is expected to be executed.
+func (c *Call) Times(n int) *Call {
+	c.minCalls, c.maxCalls = n, n
+	return c
+}
+
+// SetArg declares an action that will set the nth argument's value,
+// indirected through a pointer. Or, in the case of a slice, SetArg
+// will copy value's elements into the nth argument.
+func (c *Call) SetArg(n int, value interface{}) *Call {
+	c.t.Helper()
+
+	mt := c.methodType
+	// TODO: This will break on variadic methods.
+	// We will need to check those at invocation time.
+	if n < 0 || n >= mt.NumIn() {
+		c.t.Fatalf("SetArg(%d, ...) called for a method with %d args [%s]",
+			n, mt.NumIn(), c.origin)
+	}
+	// Permit setting argument through an interface.
+	// In the interface case, we don't (nay, can't) check the type here.
+	at := mt.In(n)
+	switch at.Kind() {
+	case reflect.Ptr:
+		dt := at.Elem()
+		if vt := reflect.TypeOf(value); !vt.AssignableTo(dt) {
+			c.t.Fatalf("SetArg(%d, ...) argument is a %v, not assignable to %v [%s]",
+				n, vt, dt, c.origin)
+		}
+	case reflect.Interface:
+		// nothing to do
+	case reflect.Slice:
+		// nothing to do
+	default:
+		c.t.Fatalf("SetArg(%d, ...) referring to argument of non-pointer non-interface non-slice type %v [%s]",
+			n, at, c.origin)
+	}
+
+	c.addAction(func(args []interface{}) []interface{} {
+		v := reflect.ValueOf(value)
+		switch reflect.TypeOf(args[n]).Kind() {
+		case reflect.Slice:
+			setSlice(args[n], v)
+		default:
+			reflect.ValueOf(args[n]).Elem().Set(v)
+		}
+		return nil
+	})
+	return c
+}
+
+// isPreReq returns true if other is a direct or indirect prerequisite to c.
+func (c *Call) isPreReq(other *Call) bool {
+	for _, preReq := range c.preReqs {
+		if other == preReq || preReq.isPreReq(other) {
+			return true
+		}
+	}
+	return false
+}
+
+// After declares that the call may only match after preReq has been exhausted.
+func (c *Call) After(preReq *Call) *Call {
+	c.t.Helper()
+
+	if c == preReq {
+		c.t.Fatalf("A call isn't allowed to be its own prerequisite")
+	}
+	if preReq.isPreReq(c) {
+		c.t.Fatalf("Loop in call order: %v is a prerequisite to %v (possibly indirectly).", c, preReq)
+	}
+
+	c.preReqs = append(c.preReqs, preReq)
+	return c
+}
+
+// Returns true if the minimum number of calls have been made.
+func (c *Call) satisfied() bool {
+	return c.numCalls >= c.minCalls
+}
+
+// Returns true iff the maximum number of calls have been made.
+func (c *Call) exhausted() bool {
+	return c.numCalls >= c.maxCalls
+}
+
+func (c *Call) String() string {
+	args := make([]string, len(c.args))
+	for i, arg := range c.args {
+		args[i] = arg.String()
+	}
+	arguments := strings.Join(args, ", ")
+	return fmt.Sprintf("%T.%v(%s) %s", c.receiver, c.method, arguments, c.origin)
+}
+
+// Tests if the given call matches the expected call.
+// If yes, returns nil. If no, returns error with message explaining why it does not match.
+func (c *Call) matches(args []interface{}) error {
+	if !c.methodType.IsVariadic() {
+		if len(args) != len(c.args) {
+			return fmt.Errorf("Expected call at %s has the wrong number of arguments. Got: %d, want: %d",
+				c.origin, len(args), len(c.args))
+		}
+
+		for i, m := range c.args {
+			if !m.Matches(args[i]) {
+				return fmt.Errorf("Expected call at %s doesn't match the argument at index %s.\nGot: %v\nWant: %v",
+					c.origin, strconv.Itoa(i), args[i], m)
+			}
+		}
+	} else {
+		if len(c.args) < c.methodType.NumIn()-1 {
+			return fmt.Errorf("Expected call at %s has the wrong number of matchers. Got: %d, want: %d",
+				c.origin, len(c.args), c.methodType.NumIn()-1)
+		}
+		if len(c.args) != c.methodType.NumIn() && len(args) != len(c.args) {
+			return fmt.Errorf("Expected call at %s has the wrong number of arguments. Got: %d, want: %d",
+				c.origin, len(args), len(c.args))
+		}
+		if len(args) < len(c.args)-1 {
+			return fmt.Errorf("Expected call at %s has the wrong number of arguments. Got: %d, want: greater than or equal to %d",
+				c.origin, len(args), len(c.args)-1)
+		}
+
+		for i, m := range c.args {
+			if i < c.methodType.NumIn()-1 {
+				// Non-variadic args
+				if !m.Matches(args[i]) {
+					return fmt.Errorf("Expected call at %s doesn't match the argument at index %s.\nGot: %v\nWant: %v",
+						c.origin, strconv.Itoa(i), args[i], m)
+				}
+				continue
+			}
+			// The last arg has a possibility of a variadic argument, so let it branch
+
+			// sample: Foo(a int, b int, c ...int)
+			if i < len(c.args) && i < len(args) {
+				if m.Matches(args[i]) {
+					// Got Foo(a, b, c) want Foo(matcherA, matcherB, gomock.Any())
+					// Got Foo(a, b, c) want Foo(matcherA, matcherB, someSliceMatcher)
+					// Got Foo(a, b, c) want Foo(matcherA, matcherB, matcherC)
+					// Got Foo(a, b) want Foo(matcherA, matcherB)
+					// Got Foo(a, b, c, d) want Foo(matcherA, matcherB, matcherC, matcherD)
+					continue
+				}
+			}
+
+			// The number of actual args don't match the number of matchers,
+			// or the last matcher is a slice and the last arg is not.
+			// If this function still matches it is because the last matcher
+			// matches all the remaining arguments or the lack of any.
+			// Convert the remaining arguments, if any, into a slice of the
+			// expected type.
+			vargsType := c.methodType.In(c.methodType.NumIn() - 1)
+			vargs := reflect.MakeSlice(vargsType, 0, len(args)-i)
+			for _, arg := range args[i:] {
+				vargs = reflect.Append(vargs, reflect.ValueOf(arg))
+			}
+			if m.Matches(vargs.Interface()) {
+				// Got Foo(a, b, c, d, e) want Foo(matcherA, matcherB, gomock.Any())
+				// Got Foo(a, b, c, d, e) want Foo(matcherA, matcherB, someSliceMatcher)
+				// Got Foo(a, b) want Foo(matcherA, matcherB, gomock.Any())
+				// Got Foo(a, b) want Foo(matcherA, matcherB, someEmptySliceMatcher)
+				break
+			}
+			// Wrong number of matchers or not match. Fail.
+			// Got Foo(a, b) want Foo(matcherA, matcherB, matcherC, matcherD)
+			// Got Foo(a, b, c) want Foo(matcherA, matcherB, matcherC, matcherD)
+			// Got Foo(a, b, c, d) want Foo(matcherA, matcherB, matcherC, matcherD, matcherE)
+			// Got Foo(a, b, c, d, e) want Foo(matcherA, matcherB, matcherC, matcherD)
+			// Got Foo(a, b, c) want Foo(matcherA, matcherB)
+			return fmt.Errorf("Expected call at %s doesn't match the argument at index %s.\nGot: %v\nWant: %v",
+				c.origin, strconv.Itoa(i), args[i:], c.args[i])
+
+		}
+	}
+
+	// Check that all prerequisite calls have been satisfied.
+	for _, preReqCall := range c.preReqs {
+		if !preReqCall.satisfied() {
+			return fmt.Errorf("Expected call at %s doesn't have a prerequisite call satisfied:\n%v\nshould be called before:\n%v",
+				c.origin, preReqCall, c)
+		}
+	}
+
+	// Check that the call is not exhausted.
+	if c.exhausted() {
+		return fmt.Errorf("Expected call at %s has already been called the max number of times.", c.origin)
+	}
+
+	return nil
+}
+
+// dropPrereqs tells the expected Call to not re-check prerequisite calls any
+// longer, and to return its current set.
+func (c *Call) dropPrereqs() (preReqs []*Call) {
+	preReqs = c.preReqs
+	c.preReqs = nil
+	return
+}
+
+func (c *Call) call(args []interface{}) []func([]interface{}) []interface{} {
+	c.numCalls++
+	return c.actions
+}
+
+// InOrder declares that the given calls should occur in order.
+func InOrder(calls ...*Call) {
+	for i := 1; i < len(calls); i++ {
+		calls[i].After(calls[i-1])
+	}
+}
+
+func setSlice(arg interface{}, v reflect.Value) {
+	va := reflect.ValueOf(arg)
+	for i := 0; i < v.Len(); i++ {
+		va.Index(i).Set(v.Index(i))
+	}
+}
+
+func (c *Call) addAction(action func([]interface{}) []interface{}) {
+	c.actions = append(c.actions, action)
+}

vendor/github.com/golang/mock/gomock/call_test.go

+package gomock
+
+import (
+	"testing"
+)
+
+type mockTestReporter struct {
+	errorCalls int
+	fatalCalls int
+}
+
+func (o *mockTestReporter) Errorf(format string, args ...interface{}) {
+	o.errorCalls++
+}
+
+func (o *mockTestReporter) Fatalf(format string, args ...interface{}) {
+	o.fatalCalls++
+}
+
+func (o *mockTestReporter) Helper() {}
+
+func TestCall_After(t *testing.T) {
+	t.Run("SelfPrereqCallsFatalf", func(t *testing.T) {
+		tr1 := &mockTestReporter{}
+
+		c := &Call{t: tr1}
+		c.After(c)
+
+		if tr1.fatalCalls != 1 {
+			t.Errorf("number of fatal calls == %v, want 1", tr1.fatalCalls)
+		}
+	})
+
+	t.Run("LoopInCallOrderCallsFatalf", func(t *testing.T) {
+		tr1 := &mockTestReporter{}
+		tr2 := &mockTestReporter{}
+
+		c1 := &Call{t: tr1}
+		c2 := &Call{t: tr2}
+		c1.After(c2)
+		c2.After(c1)
+
+		if tr1.errorCalls != 0 || tr1.fatalCalls != 0 {
+			t.Error("unexpected errors")
+		}
+
+		if tr2.fatalCalls != 1 {
+			t.Errorf("number of fatal calls == %v, want 1", tr2.fatalCalls)
+		}
+	})
+}

vendor/github.com/golang/mock/gomock/callset.go

+// Copyright 2011 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package gomock
+
+import (
+	"bytes"
+	"fmt"
+)
+
+// callSet represents a set of expected calls, indexed by receiver and method
+// name.
+type callSet struct {
+	// Calls that are still expected.
+	expected map[callSetKey][]*Call
+	// Calls that have been exhausted.
+	exhausted map[callSetKey][]*Call
+}
+
+// callSetKey is the key in the maps in callSet
+type callSetKey struct {
+	receiver interface{}
+	fname    string
+}
+
+func newCallSet() *callSet {
+	return &callSet{make(map[callSetKey][]*Call), make(map[callSetKey][]*Call)}
+}
+
+// Add adds a new expected call.
+func (cs callSet) Add(call *Call) {
+	key := callSetKey{call.receiver, call.method}
+	m := cs.expected
+	if call.exhausted() {
+		m = cs.exhausted
+	}
+	m[key] = append(m[key], call)
+}
+
+// Remove removes an expected call.
+func (cs callSet) Remove(call *Call) {
+	key := callSetKey{call.receiver, call.method}
+	calls := cs.expected[key]
+	for i, c := range calls {
+		if c == call {
+			// maintain order for remaining calls
+			cs.expected[key] = append(calls[:i], calls[i+1:]...)
+			cs.exhausted[key] = append(cs.exhausted[key], call)
+			break
+		}
+	}
+}
+
+// FindMatch searches for a matching call. Returns error with explanation message if no call matched.
+func (cs callSet) FindMatch(receiver interface{}, method string, args []interface{}) (*Call, error) {
+	key := callSetKey{receiver, method}
+
+	// Search through the expected calls.
+	expected := cs.expected[key]
+	var callsErrors bytes.Buffer
+	for _, call := range expected {
+		err := call.matches(args)
+		if err != nil {
+			fmt.Fprintf(&callsErrors, "\n%v", err)
+		} else {
+			return call, nil
+		}
+	}
+
+	// If we haven't found a match then search through the exhausted calls so we
+	// get useful error messages.
+	exhausted := cs.exhausted[key]
+	for _, call := range exhausted {
+		if err := call.matches(args); err != nil {
+			fmt.Fprintf(&callsErrors, "\n%v", err)
+		}
+	}
+
+	if len(expected)+len(exhausted) == 0 {
+		fmt.Fprintf(&callsErrors, "there are no expected calls of the method %q for that receiver", method)
+	}
+
+	return nil, fmt.Errorf(callsErrors.String())
+}
+
+// Failures returns the calls that are not satisfied.
+func (cs callSet) Failures() []*Call {
+	failures := make([]*Call, 0, len(cs.expected))
+	for _, calls := range cs.expected {
+		for _, call := range calls {
+			if !call.satisfied() {
+				failures = append(failures, call)
+			}
+		}
+	}
+	return failures
+}

vendor/github.com/golang/mock/gomock/callset_test.go

+// Copyright 2011 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package gomock
+
+import (
+	"reflect"
+	"testing"
+)
+
+type receiverType struct{}
+
+func (receiverType) Func() {}
+
+func TestCallSetAdd(t *testing.T) {
+	method := "TestMethod"
+	var receiver interface{} = "TestReceiver"
+	cs := newCallSet()
+
+	numCalls := 10
+	for i := 0; i < numCalls; i++ {
+		cs.Add(newCall(t, receiver, method, reflect.TypeOf(receiverType{}.Func)))
+	}
+
+	call, err := cs.FindMatch(receiver, method, []interface{}{})
+	if err != nil {
+		t.Fatalf("FindMatch: %v", err)
+	}
+	if call == nil {
+		t.Fatalf("FindMatch: Got nil, want non-nil *Call")
+	}
+}
+
+func TestCallSetRemove(t *testing.T) {
+	method := "TestMethod"
+	var receiver interface{} = "TestReceiver"
+
+	cs := newCallSet()
+	ourCalls := []*Call{}
+
+	numCalls := 10
+	for i := 0; i < numCalls; i++ {
+		// NOTE: abuse the `numCalls` value to convey initial ordering of mocked calls
+		generatedCall := &Call{receiver: receiver, method: method, numCalls: i}
+		cs.Add(generatedCall)
+		ourCalls = append(ourCalls, generatedCall)
+	}
+
+	// validateOrder validates that the calls in the array are ordered as they were added
+	validateOrder := func(calls []*Call) {
+		// lastNum tracks the last `numCalls` (call order) value seen
+		lastNum := -1
+		for _, c := range calls {
+			if lastNum >= c.numCalls {
+				t.Errorf("found call %d after call %d", c.numCalls, lastNum)
+			}
+			lastNum = c.numCalls
+		}
+	}
+
+	for _, c := range ourCalls {
+		validateOrder(cs.expected[callSetKey{receiver, method}])
+		cs.Remove(c)
+	}
+}

vendor/github.com/golang/mock/gomock/controller.go

+// Copyright 2010 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package gomock is a mock framework for Go.
+//
+// Standard usage:
+//   (1) Define an interface that you wish to mock.
+//         type MyInterface interface {
+//           SomeMethod(x int64, y string)
+//         }
+//   (2) Use mockgen to generate a mock from the interface.
+//   (3) Use the mock in a test:
+//         func TestMyThing(t *testing.T) {
+//           mockCtrl := gomock.NewController(t)
+//           defer mockCtrl.Finish()
+//
+//           mockObj := something.NewMockMyInterface(mockCtrl)
+//           mockObj.EXPECT().SomeMethod(4, "blah")
+//           // pass mockObj to a real object and play with it.
+//         }
+//
+// By default, expected calls are not enforced to run in any particular order.
+// Call order dependency can be enforced by use of InOrder and/or Call.After.
+// Call.After can create more varied call order dependencies, but InOrder is
+// often more convenient.
+//
+// The following examples create equivalent call order dependencies.
+//
+// Example of using Call.After to chain expected call order:
+//
+//     firstCall := mockObj.EXPECT().SomeMethod(1, "first")
+//     secondCall := mockObj.EXPECT().SomeMethod(2, "second").After(firstCall)
+//     mockObj.EXPECT().SomeMethod(3, "third").After(secondCall)
+//
+// Example of using InOrder to declare expected call order:
+//
+//     gomock.InOrder(
+//         mockObj.EXPECT().SomeMethod(1, "first"),
+//         mockObj.EXPECT().SomeMethod(2, "second"),
+//         mockObj.EXPECT().SomeMethod(3, "third"),
+//     )
+//
+// TODO:
+//	- Handle different argument/return types (e.g. ..., chan, map, interface).
+package gomock
+
+import (
+	"context"
+	"fmt"
+	"reflect"
+	"runtime"
+	"sync"
+)
+
+// A TestReporter is something that can be used to report test failures.  It
+// is satisfied by the standard library's *testing.T.
+type TestReporter interface {
+	Errorf(format string, args ...interface{})
+	Fatalf(format string, args ...interface{})
+}
+
+// TestHelper is a TestReporter that has the Helper method.  It is satisfied
+// by the standard library's *testing.T.
+type TestHelper interface {
+	TestReporter
+	Helper()
+}
+
+// A Controller represents the top-level control of a mock ecosystem.  It
+// defines the scope and lifetime of mock objects, as well as their
+// expectations.  It is safe to call Controller's methods from multiple
+// goroutines. Each test should create a new Controller and invoke Finish via
+// defer.
+//
+//   func TestFoo(t *testing.T) {
+//     ctrl := gomock.NewController(t)
+//     defer ctrl.Finish()
+//     // ..
+//   }
+//
+//   func TestBar(t *testing.T) {
+//     t.Run("Sub-Test-1", st) {
+//       ctrl := gomock.NewController(st)
+//       defer ctrl.Finish()
+//       // ..
+//     })
+//     t.Run("Sub-Test-2", st) {
+//       ctrl := gomock.NewController(st)
+//       defer ctrl.Finish()
+//       // ..
+//     })
+//   })
+type Controller struct {
+	// T should only be called within a generated mock. It is not intended to
+	// be used in user code and may be changed in future versions. T is the
+	// TestReporter passed in when creating the Controller via NewController.
+	// If the TestReporter does not implement a TestHelper it will be wrapped
+	// with a nopTestHelper.
+	T             TestHelper
+	mu            sync.Mutex
+	expectedCalls *callSet
+	finished      bool
+}
+
+// NewController returns a new Controller. It is the preferred way to create a
+// Controller.
+func NewController(t TestReporter) *Controller {
+	h, ok := t.(TestHelper)
+	if !ok {
+		h = nopTestHelper{t}
+	}
+
+	return &Controller{
+		T:             h,
+		expectedCalls: newCallSet(),
+	}
+}
+
+type cancelReporter struct {
+	TestHelper
+	cancel func()
+}
+
+func (r *cancelReporter) Errorf(format string, args ...interface{}) {
+	r.TestHelper.Errorf(format, args...)
+}
+func (r *cancelReporter) Fatalf(format string, args ...interface{}) {
+	defer r.cancel()
+	r.TestHelper.Fatalf(format, args...)
+}
+
+// WithContext returns a new Controller and a Context, which is cancelled on any
+// fatal failure.
+func WithContext(ctx context.Context, t TestReporter) (*Controller, context.Context) {
+	h, ok := t.(TestHelper)
+	if !ok {
+		h = nopTestHelper{t}
+	}
+
+	ctx, cancel := context.WithCancel(ctx)
+	return NewController(&cancelReporter{h, cancel}), ctx
+}
+
+type nopTestHelper struct {
+	TestReporter
+}
+
+func (h nopTestHelper) Helper() {}
+
+// RecordCall is called by a mock. It should not be called by user code.
+func (ctrl *Controller) RecordCall(receiver interface{}, method string, args ...interface{}) *Call {
+	ctrl.T.Helper()
+
+	recv := reflect.ValueOf(receiver)
+	for i := 0; i < recv.Type().NumMethod(); i++ {
+		if recv.Type().Method(i).Name == method {
+			return ctrl.RecordCallWithMethodType(receiver, method, recv.Method(i).Type(), args...)
+		}
+	}
+	ctrl.T.Fatalf("gomock: failed finding method %s on %T", method, receiver)
+	panic("unreachable")
+}
+
+// RecordCallWithMethodType is called by a mock. It should not be called by user code.
+func (ctrl *Controller) RecordCallWithMethodType(receiver interface{}, method string, methodType reflect.Type, args ...interface{}) *Call {
+	ctrl.T.Helper()
+
+	call := newCall(ctrl.T, receiver, method, methodType, args...)
+
+	ctrl.mu.Lock()
+	defer ctrl.mu.Unlock()
+	ctrl.expectedCalls.Add(call)
+
+	return call
+}
+
+// Call is called by a mock. It should not be called by user code.
+func (ctrl *Controller) Call(receiver interface{}, method string, args ...interface{}) []interface{} {
+	ctrl.T.Helper()
+
+	// Nest this code so we can use defer to make sure the lock is released.
+	actions := func() []func([]interface{}) []interface{} {
+		ctrl.T.Helper()
+		ctrl.mu.Lock()
+		defer ctrl.mu.Unlock()
+
+		expected, err := ctrl.expectedCalls.FindMatch(receiver, method, args)
+		if err != nil {
+			origin := callerInfo(2)
+			ctrl.T.Fatalf("Unexpected call to %T.%v(%v) at %s because: %s", receiver, method, args, origin, err)
+		}
+
+		// Two things happen here:
+		// * the matching call no longer needs to check prerequite calls,
+		// * and the prerequite calls are no longer expected, so remove them.
+		preReqCalls := expected.dropPrereqs()
+		for _, preReqCall := range preReqCalls {
+			ctrl.expectedCalls.Remove(preReqCall)
+		}
+
+		actions := expected.call(args)
+		if expected.exhausted() {
+			ctrl.expectedCalls.Remove(expected)
+		}
+		return actions
+	}()
+
+	var rets []interface{}
+	for _, action := range actions {
+		if r := action(args); r != nil {
+			rets = r
+		}
+	}
+
+	return rets
+}
+
+// Finish checks to see if all the methods that were expected to be called
+// were called. It should be invoked for each Controller. It is not idempotent
+// and therefore can only be invoked once.
+func (ctrl *Controller) Finish() {
+	ctrl.T.Helper()
+
+	ctrl.mu.Lock()
+	defer ctrl.mu.Unlock()
+
+	if ctrl.finished {
+		ctrl.T.Fatalf("Controller.Finish was called more than once. It has to be called exactly once.")
+	}
+	ctrl.finished = true
+
+	// If we're currently panicking, probably because this is a deferred call,
+	// pass through the panic.
+	if err := recover(); err != nil {
+		panic(err)
+	}
+
+	// Check that all remaining expected calls are satisfied.
+	failures := ctrl.expectedCalls.Failures()
+	for _, call := range failures {
+		ctrl.T.Errorf("missing call(s) to %v", call)
+	}
+	if len(failures) != 0 {
+		ctrl.T.Fatalf("aborting test due to missing call(s)")
+	}
+}
+
+func callerInfo(skip int) string {
+	if _, file, line, ok := runtime.Caller(skip + 1); ok {
+		return fmt.Sprintf("%s:%d", file, line)
+	}
+	return "unknown file"
+}

vendor/github.com/golang/mock/gomock/internal/mock_gomock/mock_matcher.go

+// Code generated by MockGen. DO NOT EDIT.
+// Source: github.com/golang/mock/gomock (interfaces: Matcher)
+
+// Package mock_gomock is a generated GoMock package.
+package mock_gomock
+
+import (
+	gomock "github.com/golang/mock/gomock"
+	reflect "reflect"
+)
+
+// MockMatcher is a mock of Matcher interface
+type MockMatcher struct {
+	ctrl     *gomock.Controller
+	recorder *MockMatcherMockRecorder
+}
+
+// MockMatcherMockRecorder is the mock recorder for MockMatcher
+type MockMatcherMockRecorder struct {
+	mock *MockMatcher
+}
+
+// NewMockMatcher creates a new mock instance
+func NewMockMatcher(ctrl *gomock.Controller) *MockMatcher {
+	mock := &MockMatcher{ctrl: ctrl}
+	mock.recorder = &MockMatcherMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use
+func (m *MockMatcher) EXPECT() *MockMatcherMockRecorder {
+	return m.recorder
+}
+
+// Matches mocks base method
+func (m *MockMatcher) Matches(arg0 interface{}) bool {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Matches", arg0)
+	ret0, _ := ret[0].(bool)
+	return ret0
+}
+
+// Matches indicates an expected call of Matches
+func (mr *MockMatcherMockRecorder) Matches(arg0 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Matches", reflect.TypeOf((*MockMatcher)(nil).Matches), arg0)
+}
+
+// String mocks base method
+func (m *MockMatcher) String() string {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "String")
+	ret0, _ := ret[0].(string)
+	return ret0
+}
+
+// String indicates an expected call of String
+func (mr *MockMatcherMockRecorder) String() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "String", reflect.TypeOf((*MockMatcher)(nil).String))
+}

vendor/github.com/golang/mock/gomock/matchers.go

+// Copyright 2010 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package gomock
+
+import (
+	"fmt"
+	"reflect"
+)
+
+// A Matcher is a representation of a class of values.
+// It is used to represent the valid or expected arguments to a mocked method.
+type Matcher interface {
+	// Matches returns whether x is a match.
+	Matches(x interface{}) bool
+
+	// String describes what the matcher matches.
+	String() string
+}
+
+type anyMatcher struct{}
+
+func (anyMatcher) Matches(x interface{}) bool {
+	return true
+}
+
+func (anyMatcher) String() string {
+	return "is anything"
+}
+
+type eqMatcher struct {
+	x interface{}
+}
+
+func (e eqMatcher) Matches(x interface{}) bool {
+	return reflect.DeepEqual(e.x, x)
+}
+
+func (e eqMatcher) String() string {
+	return fmt.Sprintf("is equal to %v", e.x)
+}
+
+type nilMatcher struct{}
+
+func (nilMatcher) Matches(x interface{}) bool {
+	if x == nil {
+		return true
+	}
+
+	v := reflect.ValueOf(x)
+	switch v.Kind() {
+	case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map,
+		reflect.Ptr, reflect.Slice:
+		return v.IsNil()
+	}
+
+	return false
+}
+
+func (nilMatcher) String() string {
+	return "is nil"
+}
+
+type notMatcher struct {
+	m Matcher
+}
+
+func (n notMatcher) Matches(x interface{}) bool {
+	return !n.m.Matches(x)
+}
+
+func (n notMatcher) String() string {
+	// TODO: Improve this if we add a NotString method to the Matcher interface.
+	return "not(" + n.m.String() + ")"
+}
+
+type assignableToTypeOfMatcher struct {
+	targetType reflect.Type
+}
+
+func (m assignableToTypeOfMatcher) Matches(x interface{}) bool {
+	return reflect.TypeOf(x).AssignableTo(m.targetType)
+}
+
+func (m assignableToTypeOfMatcher) String() string {
+	return "is assignable to " + m.targetType.Name()
+}
+
+// Constructors
+// Any returns a matcher that always matches.
+func Any() Matcher { return anyMatcher{} }
+
+// Eq returns a matcher that matches on equality.
+//
+// Example usage:
+//   Eq(5).Matches(5) // returns true
+//   Eq(5).Matches(4) // returns false
+func Eq(x interface{}) Matcher { return eqMatcher{x} }
+
+// Nil returns a matcher that matches if the received value is nil.
+//
+// Example usage:
+//   var x *bytes.Buffer
+//   Nil().Matches(x) // returns true
+//   x = &bytes.Buffer{}
+//   Nil().Matches(x) // returns false
+func Nil() Matcher { return nilMatcher{} }
+
+// Not reverses the results of its given child matcher.
+//
+// Example usage:
+//   Not(Eq(5)).Matches(4) // returns true
+//   Not(Eq(5)).Matches(5) // returns false
+func Not(x interface{}) Matcher {
+	if m, ok := x.(Matcher); ok {
+		return notMatcher{m}
+	}
+	return notMatcher{Eq(x)}
+}
+
+// AssignableToTypeOf is a Matcher that matches if the parameter to the mock
+// function is assignable to the type of the parameter to this function.
+//
+// Example usage:
+//   var s fmt.Stringer = &bytes.Buffer{}
+//   AssignableToTypeOf(s).Matches(time.Second) // returns true
+//   AssignableToTypeOf(s).Matches(99) // returns false
+func AssignableToTypeOf(x interface{}) Matcher {
+	return assignableToTypeOfMatcher{reflect.TypeOf(x)}
+}

vendor/github.com/golang/mock/gomock/matchers_test.go

+// Copyright 2010 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:generate mockgen -destination internal/mock_gomock/mock_matcher.go github.com/golang/mock/gomock Matcher
+
+package gomock_test
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/golang/mock/gomock"
+	"github.com/golang/mock/gomock/internal/mock_gomock"
+)
+
+func TestMatchers(t *testing.T) {
+	type e interface{}
+	type testCase struct {
+		matcher gomock.Matcher
+		yes, no []e
+	}
+	tests := []testCase{
+		{gomock.Any(), []e{3, nil, "foo"}, nil},
+		{gomock.Eq(4), []e{4}, []e{3, "blah", nil, int64(4)}},
+		{gomock.Nil(),
+			[]e{nil, (error)(nil), (chan bool)(nil), (*int)(nil)},
+			[]e{"", 0, make(chan bool), errors.New("err"), new(int)}},
+		{gomock.Not(gomock.Eq(4)), []e{3, "blah", nil, int64(4)}, []e{4}},
+	}
+	for i, test := range tests {
+		for _, x := range test.yes {
+			if !test.matcher.Matches(x) {
+				t.Errorf(`test %d: "%v %s" should be true.`, i, x, test.matcher)
+			}
+		}
+		for _, x := range test.no {
+			if test.matcher.Matches(x) {
+				t.Errorf(`test %d: "%v %s" should be false.`, i, x, test.matcher)
+			}
+		}
+	}
+}
+
+// A more thorough test of notMatcher
+func TestNotMatcher(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	mockMatcher := mock_gomock.NewMockMatcher(ctrl)
+	notMatcher := gomock.Not(mockMatcher)
+
+	mockMatcher.EXPECT().Matches(4).Return(true)
+	if match := notMatcher.Matches(4); match {
+		t.Errorf("notMatcher should not match 4")
+	}
+
+	mockMatcher.EXPECT().Matches(5).Return(false)
+	if match := notMatcher.Matches(5); !match {
+		t.Errorf("notMatcher should match 5")
+	}
+}
+
+type Dog struct {
+	Breed, Name string
+}
+
+// A thorough test of assignableToTypeOfMatcher
+func TestAssignableToTypeOfMatcher(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	aStr := "def"
+	anotherStr := "ghi"
+
+	if match := gomock.AssignableToTypeOf("abc").Matches(4); match {
+		t.Errorf(`AssignableToTypeOf("abc") should not match 4`)
+	}
+	if match := gomock.AssignableToTypeOf("abc").Matches(&aStr); match {
+		t.Errorf(`AssignableToTypeOf("abc") should not match &aStr (*string)`)
+	}
+	if match := gomock.AssignableToTypeOf("abc").Matches("def"); !match {
+		t.Errorf(`AssignableToTypeOf("abc") should match "def"`)
+	}
+	if match := gomock.AssignableToTypeOf(&aStr).Matches("abc"); match {
+		t.Errorf(`AssignableToTypeOf(&aStr) should not match "abc"`)
+	}
+	if match := gomock.AssignableToTypeOf(&aStr).Matches(&anotherStr); !match {
+		t.Errorf(`AssignableToTypeOf(&aStr) should match &anotherStr`)
+	}
+	if match := gomock.AssignableToTypeOf(0).Matches(4); !match {
+		t.Errorf(`AssignableToTypeOf(0) should match 4`)
+	}
+	if match := gomock.AssignableToTypeOf(0).Matches("def"); match {
+		t.Errorf(`AssignableToTypeOf(0) should not match "def"`)
+	}
+	if match := gomock.AssignableToTypeOf(Dog{}).Matches(&Dog{}); match {
+		t.Errorf(`AssignableToTypeOf(Dog{}) should not match &Dog{}`)
+	}
+	if match := gomock.AssignableToTypeOf(Dog{}).Matches(Dog{Breed: "pug", Name: "Fido"}); !match {
+		t.Errorf(`AssignableToTypeOf(Dog{}) should match Dog{Breed: "pug", Name: "Fido"}`)
+	}
+	if match := gomock.AssignableToTypeOf(&Dog{}).Matches(Dog{}); match {
+		t.Errorf(`AssignableToTypeOf(&Dog{}) should not match Dog{}`)
+	}
+	if match := gomock.AssignableToTypeOf(&Dog{}).Matches(&Dog{Breed: "pug", Name: "Fido"}); !match {
+		t.Errorf(`AssignableToTypeOf(&Dog{}) should match &Dog{Breed: "pug", Name: "Fido"}`)
+	}
+}

vendor/github.com/neo4j-drivers/gobolt/LICENSE

+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
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+      where such license applies only to those patent claims licensable
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+      Contribution(s) alone or by combination of their Contribution(s)
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+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
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+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
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+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
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+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
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+          as part of the Derivative Works; within the Source form or
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+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
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+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/neo4j-drivers/gobolt/README.md

+# neo4j-go-connector
+
+This package is an internal dependency being used by [Neo4j Go Driver](https://github.com/neo4j/neo4j-go-driver).
\ No newline at end of file

vendor/github.com/neo4j-drivers/gobolt/config.go

+/*
+ * Copyright (c) 2002-2019 "Neo4j,"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package gobolt
+
+/*
+#include <stdlib.h>
+
+#include "bolt/bolt.h"
+*/
+import "C"
+import (
+	"bytes"
+	"crypto/x509"
+	"encoding/pem"
+	"net/url"
+	"time"
+	"unsafe"
+)
+
+// Config holds the available configurations options applicable to the connector
+type Config struct {
+	Encryption             bool
+	TLSCertificates        []*x509.Certificate
+	TLSSkipVerify          bool
+	TLSSkipVerifyHostname  bool
+	MaxPoolSize            int
+	MaxConnLifetime        time.Duration
+	ConnAcquisitionTimeout time.Duration
+	SockConnectTimeout     time.Duration
+	SockKeepalive          bool
+	ConnectorErrorFactory  func(state, code int, codeText, context, description string) ConnectorError
+	DatabaseErrorFactory   func(classification, code, message string) DatabaseError
+	GenericErrorFactory    func(format string, args ...interface{}) GenericError
+	Log                    Logging
+	AddressResolver        URLAddressResolver
+	ValueHandlers          []ValueHandler
+}
+
+func pemEncodeCerts(certs []*x509.Certificate) (*bytes.Buffer, error) {
+	if len(certs) == 0 {
+		return nil, nil
+	}
+
+	var buf = &bytes.Buffer{}
+	for _, cert := range certs {
+		if err := pem.Encode(buf, &pem.Block{Type: "CERTIFICATE", Bytes: cert.Raw}); err != nil {
+			return nil, err
+		}
+	}
+	return buf, nil
+}
+
+func createConfig(key int, uri *url.URL, config *Config, valueSystem *boltValueSystem) (*C.struct_BoltConfig, error) {
+	var err error
+	var cTrust *C.struct_BoltTrust
+	var cSocketOpts *C.struct_BoltSocketOptions
+	var cRoutingContext *C.struct_BoltValue
+	var cUserAgent *C.char
+	var cConfig *C.struct_BoltConfig
+
+	if cTrust, err = createTrust(config); err != nil {
+		return nil, valueSystem.genericErrorFactory("unable to create trust settings: %v", err)
+	}
+	defer C.BoltTrust_destroy(cTrust)
+
+	if cRoutingContext, err = createRoutingContext(uri, valueSystem); err != nil {
+		return nil, valueSystem.genericErrorFactory("unable to extract routing context: %v", err)
+	}
+	defer C.BoltValue_destroy(cRoutingContext)
+
+	cSocketOpts = createSocketOptions(config)
+	defer C.BoltSocketOptions_destroy(cSocketOpts)
+
+	cUserAgent = C.CString("Go Driver/1.7")
+	defer C.free(unsafe.Pointer(cUserAgent))
+
+	var cLogger = registerLogging(key, config.Log)
+	defer C.BoltLog_destroy(cLogger)
+
+	var cResolver = registerResolver(key, config.AddressResolver)
+	defer C.BoltAddressResolver_destroy(cResolver)
+
+	cConfig = C.BoltConfig_create()
+	C.BoltConfig_set_scheme(cConfig, scheme(uri))
+	C.BoltConfig_set_transport(cConfig, transport(config))
+	C.BoltConfig_set_trust(cConfig, cTrust)
+	C.BoltConfig_set_user_agent(cConfig, cUserAgent)
+	C.BoltConfig_set_routing_context(cConfig, cRoutingContext)
+	C.BoltConfig_set_address_resolver(cConfig, cResolver)
+	C.BoltConfig_set_log(cConfig, cLogger)
+	C.BoltConfig_set_max_pool_size(cConfig, C.int32_t(config.MaxPoolSize))
+	C.BoltConfig_set_max_connection_life_time(cConfig, C.int32_t(config.MaxConnLifetime/time.Millisecond))
+	C.BoltConfig_set_max_connection_acquisition_time(cConfig, C.int32_t(config.ConnAcquisitionTimeout/time.Millisecond))
+	C.BoltConfig_set_socket_options(cConfig, cSocketOpts)
+	return cConfig, nil
+}
+
+func scheme(uri *url.URL) C.BoltScheme {
+	var mode C.BoltScheme = C.BOLT_SCHEME_DIRECT
+	if uri.Scheme == "bolt+routing" {
+		mode = C.BOLT_SCHEME_ROUTING
+	}
+	if uri.Scheme == "neo4j" {
+		mode = C.BOLT_SCHEME_NEO4J
+	}
+
+	return mode
+}
+
+func transport(config *Config) C.BoltTransport {
+	var transport C.BoltTransport = C.BOLT_TRANSPORT_PLAINTEXT
+	if config.Encryption {
+		transport = C.BOLT_TRANSPORT_ENCRYPTED
+	}
+	return transport
+}
+
+func createSocketOptions(config *Config) *C.struct_BoltSocketOptions {
+	var cSocketOpts = C.BoltSocketOptions_create()
+
+	C.BoltSocketOptions_set_connect_timeout(cSocketOpts, C.int32_t(config.SockConnectTimeout/time.Millisecond))
+	C.BoltSocketOptions_set_keep_alive(cSocketOpts, 1)
+	if !config.SockKeepalive {
+		C.BoltSocketOptions_set_keep_alive(cSocketOpts, 0)
+	}
+
+	return cSocketOpts
+}
+
+func createTrust(config *Config) (*C.struct_BoltTrust, error) {
+	var cTrust = C.BoltTrust_create()
+	C.BoltTrust_set_certs(cTrust, nil, 0)
+	C.BoltTrust_set_skip_verify(cTrust, 0)
+	C.BoltTrust_set_skip_verify_hostname(cTrust, 0)
+
+	certsBuf, err := pemEncodeCerts(config.TLSCertificates)
+	if err != nil {
+		C.BoltTrust_destroy(cTrust)
+
+		return nil, err
+	}
+
+	if certsBuf != nil {
+		certsBytes := certsBuf.String()
+		C.BoltTrust_set_certs(cTrust, C.CString(certsBytes), C.uint64_t(certsBuf.Len()))
+	}
+
+	if config.TLSSkipVerify {
+		C.BoltTrust_set_skip_verify(cTrust, 1)
+	}
+
+	if config.TLSSkipVerifyHostname {
+		C.BoltTrust_set_skip_verify_hostname(cTrust, 1)
+	}
+
+	return cTrust, nil
+}
+
+func createRoutingContext(source *url.URL, valueSystem *boltValueSystem) (*C.struct_BoltValue, error) {
+	var err error
+	var values url.Values
+	var result map[string]string
+
+	if values, err = url.ParseQuery(source.RawQuery); err != nil {
+		return nil, valueSystem.genericErrorFactory("unable to parse routing context '%s'", source.RawQuery)
+	}
+
+	if len(values) == 0 {
+		return nil, nil
+	}
+
+	result = make(map[string]string, len(values))
+	for key, value := range values {
+		if len(value) > 1 {
+			return nil, valueSystem.genericErrorFactory("duplicate value specified for '%s' as routing context", key)
+		}
+
+		result[key] = value[0]
+	}
+
+	return valueSystem.valueToConnector(result)
+}

vendor/github.com/neo4j-drivers/gobolt/connection.go

+/*
+ * Copyright (c) 2002-2019 "Neo4j,"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package gobolt
+
+import (
+	"time"
+)
+
+// RequestHandle identifies an individual request sent to server
+type RequestHandle int64
+
+// FetchType identifies the type of the result fetched via Fetch() call
+type FetchType int
+
+const (
+	// FetchTypeRecord tells that fetched data is record
+	FetchTypeRecord FetchType = 1
+	// FetchTypeMetadata tells that fetched data is metadata
+	FetchTypeMetadata FetchType = 0
+	// FetchTypeError tells that fetch was not successful
+	FetchTypeError FetchType = -1
+)
+
+// Connection represents an active seabolt connection
+type Connection interface {
+	Id() (string, error)
+	RemoteAddress() (string, error)
+	Server() (string, error)
+
+	Begin(bookmarks []string, txTimeout time.Duration, txMetadata map[string]interface{}) (RequestHandle, error)
+	Commit() (RequestHandle, error)
+	Rollback() (RequestHandle, error)
+	Run(cypher string, parameters map[string]interface{}, bookmarks []string, txTimeout time.Duration, txMetadata map[string]interface{}) (RequestHandle, error)
+	PullAll() (RequestHandle, error)
+	DiscardAll() (RequestHandle, error)
+	Reset() (RequestHandle, error)
+	Flush() error
+	Fetch(request RequestHandle) (FetchType, error)  // return type ?
+	FetchSummary(request RequestHandle) (int, error) // return type ?
+
+	LastBookmark() (string, error)
+	Fields() ([]string, error)
+	Metadata() (map[string]interface{}, error)
+	Data() ([]interface{}, error)
+
+	Close() error
+}

vendor/github.com/neo4j-drivers/gobolt/connection_mock_test.go

+/*
+ * Copyright (c) 2002-2019 "Neo4j,"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package gobolt
+
+import (
+	"time"
+
+	"github.com/stretchr/testify/mock"
+)
+
+type mockConnection struct {
+	mock.Mock
+}
+
+func (m *mockConnection) Id() (string, error) {
+	args := m.Called()
+	return args.String(0), args.Error(1)
+}
+
+func (m *mockConnection) RemoteAddress() (string, error) {
+	args := m.Called()
+	return args.String(0), args.Error(1)
+}
+
+func (m *mockConnection) Server() (string, error) {
+	args := m.Called()
+	return args.String(0), args.Error(1)
+}
+
+func (m *mockConnection) Begin(bookmarks []string, txTimeout time.Duration, txMetadata map[string]interface{}) (RequestHandle, error) {
+	args := m.Called(bookmarks, txTimeout, txMetadata)
+	return args.Get(0).(RequestHandle), args.Error(1)
+}
+
+func (m *mockConnection) Commit() (RequestHandle, error) {
+	args := m.Called()
+	return args.Get(0).(RequestHandle), args.Error(1)
+}
+
+func (m *mockConnection) Rollback() (RequestHandle, error) {
+	args := m.Called()
+	return args.Get(0).(RequestHandle), args.Error(1)
+}
+
+func (m *mockConnection) Run(cypher string, parameters map[string]interface{}, bookmarks []string, txTimeout time.Duration, txMetadata map[string]interface{}) (RequestHandle, error) {
+	args := m.Called(cypher, parameters, bookmarks, txTimeout, txMetadata)
+	return args.Get(0).(RequestHandle), args.Error(1)
+}
+
+func (m *mockConnection) PullAll() (RequestHandle, error) {
+	args := m.Called()
+	return args.Get(0).(RequestHandle), args.Error(1)
+}
+
+func (m *mockConnection) DiscardAll() (RequestHandle, error) {
+	args := m.Called()
+	return args.Get(0).(RequestHandle), args.Error(1)
+}
+
+func (m *mockConnection) Reset() (RequestHandle, error) {
+	args := m.Called()
+	return args.Get(0).(RequestHandle), args.Error(1)
+}
+
+func (m *mockConnection) Flush() error {
+	args := m.Called()
+	return args.Error(0)
+}
+
+func (m *mockConnection) Fetch(request RequestHandle) (FetchType, error) {
+	args := m.Called(request)
+	return args.Get(0).(FetchType), args.Error(1)
+}
+
+func (m *mockConnection) FetchSummary(request RequestHandle) (int, error) {
+	args := m.Called(request)
+	return args.Int(0), args.Error(1)
+}
+
+func (m *mockConnection) LastBookmark() (string, error) {
+	args := m.Called()
+	return args.String(0), args.Error(1)
+}
+
+func (m *mockConnection) Fields() ([]string, error) {
+	args := m.Called()
+	return args.Get(0).([]string), args.Error(1)
+}
+
+func (m *mockConnection) Metadata() (map[string]interface{}, error) {
+	args := m.Called()
+	return args.Get(0).(map[string]interface{}), args.Error(1)
+}
+
+func (m *mockConnection) Data() ([]interface{}, error) {
+	args := m.Called()
+	return args.Get(0).([]interface{}), args.Error(1)
+}
+
+func (m *mockConnection) Close() error {
+	args := m.Called()
+	return args.Error(0)
+}

vendor/github.com/neo4j-drivers/gobolt/connection_seabolt.go

+/*
+ * Copyright (c) 2002-2019 "Neo4j,"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package gobolt
+
+/*
+#include <stdlib.h>
+
+#include "bolt/bolt.h"
+*/
+import "C"
+import (
+	"fmt"
+	"time"
+	"unsafe"
+)
+
+type seaboltConnection struct {
+	connector   *seaboltConnector
+	cInstance   *C.struct_BoltConnection
+	valueSystem *boltValueSystem
+}
+
+var newSeaboltConnection = func(connector *seaboltConnector, mode AccessMode) (*seaboltConnection, error) {
+	var cMode uint32 = C.BOLT_ACCESS_MODE_WRITE
+	if mode == AccessModeRead {
+		cMode = C.BOLT_ACCESS_MODE_READ
+	}
+
+	cStatus := C.BoltStatus_create()
+	defer C.BoltStatus_destroy(cStatus)
+	cConnection := C.BoltConnector_acquire(connector.cInstance, C.BoltAccessMode(cMode), cStatus)
+	if cConnection == nil {
+		state := C.BoltStatus_get_state(cStatus)
+		code := C.BoltStatus_get_error(cStatus)
+		codeText := C.GoString(C.BoltError_get_string(code))
+		context := C.GoString(C.BoltStatus_get_error_context(cStatus))
+
+		return nil, newConnectorError(int(state), int(code), codeText, context, "unable to acquire connection from connector")
+	}
+
+	return &seaboltConnection{connector: connector, cInstance: cConnection, valueSystem: connector.valueSystem}, nil
+}
+
+func (connection *seaboltConnection) Id() (string, error) {
+	return C.GoString(C.BoltConnection_id(connection.cInstance)), nil
+}
+
+func (connection *seaboltConnection) RemoteAddress() (string, error) {
+	connectedAddress := C.BoltConnection_remote_endpoint(connection.cInstance)
+	if connectedAddress == nil {
+		return "UNKNOWN", nil
+	}
+
+	return fmt.Sprintf("%s:%s", C.GoString(C.BoltAddress_host(connectedAddress)), C.GoString(C.BoltAddress_port(connectedAddress))), nil
+}
+
+func (connection *seaboltConnection) Server() (string, error) {
+	server := C.BoltConnection_server(connection.cInstance)
+	if server == nil {
+		return "UNKNOWN", nil
+	}
+
+	return C.GoString(server), nil
+}
+
+func (connection *seaboltConnection) Begin(bookmarks []string, txTimeout time.Duration, txMetadata map[string]interface{}) (RequestHandle, error) {
+	var res C.int32_t
+
+	res = C.BoltConnection_clear_begin(connection.cInstance)
+	if res != C.BOLT_SUCCESS {
+		return -1, newError(connection, "unable to clear begin message")
+	}
+
+	if len(bookmarks) > 0 {
+		bookmarksValue, err := connection.valueSystem.valueToConnector(bookmarks)
+		if err != nil {
+			return -1, connection.valueSystem.genericErrorFactory("unable to convert bookmarks to connector value for begin message: %v", err)
+		}
+		res := C.BoltConnection_set_begin_bookmarks(connection.cInstance, bookmarksValue)
+		C.BoltValue_destroy(bookmarksValue)
+		if res != C.BOLT_SUCCESS {
+			return -1, newError(connection, "unable to set bookmarks for begin message")
+		}
+	}
+
+	if txTimeout > 0 {
+		timeOut := C.int64_t(txTimeout / time.Millisecond)
+		res := C.BoltConnection_set_begin_tx_timeout(connection.cInstance, timeOut)
+		if res != C.BOLT_SUCCESS {
+			return -1, newError(connection, "unable to set tx timeout for begin message")
+		}
+	}
+
+	if len(txMetadata) > 0 {
+		metadataValue, err := connection.valueSystem.valueToConnector(txMetadata)
+		if err != nil {
+			return -1, connection.valueSystem.genericErrorFactory("unable to convert tx metadata to connector value for begin message: %v", err)
+		}
+		res := C.BoltConnection_set_begin_tx_metadata(connection.cInstance, metadataValue)
+		C.BoltValue_destroy(metadataValue)
+		if res != C.BOLT_SUCCESS {
+			return -1, newError(connection, "unable to set tx metadata for begin message")
+		}
+	}
+
+	res = C.BoltConnection_load_begin_request(connection.cInstance)
+	if res != C.BOLT_SUCCESS {
+		return -1, newError(connection, "unable to generate begin message")
+	}
+
+	return RequestHandle(C.BoltConnection_last_request(connection.cInstance)), nil
+}
+
+func (connection *seaboltConnection) Commit() (RequestHandle, error) {
+	res := C.BoltConnection_load_commit_request(connection.cInstance)
+	if res != C.BOLT_SUCCESS {
+		return -1, newError(connection, "unable to generate commit message")
+	}
+
+	return RequestHandle(C.BoltConnection_last_request(connection.cInstance)), nil
+}
+
+func (connection *seaboltConnection) Rollback() (RequestHandle, error) {
+	res := C.BoltConnection_load_rollback_request(connection.cInstance)
+	if res != C.BOLT_SUCCESS {
+		return -1, newError(connection, "unable to generate rollback message")
+	}
+
+	return RequestHandle(C.BoltConnection_last_request(connection.cInstance)), nil
+}
+
+func (connection *seaboltConnection) Run(cypher string, params map[string]interface{}, bookmarks []string, txTimeout time.Duration, txMetadata map[string]interface{}) (RequestHandle, error) {
+	var res C.int32_t
+
+	res = C.BoltConnection_clear_run(connection.cInstance)
+	if res != C.BOLT_SUCCESS {
+		return -1, newError(connection, "unable to clear run message")
+	}
+
+	cypherStr := C.CString(cypher)
+	res = C.BoltConnection_set_run_cypher(connection.cInstance, cypherStr, C.uint64_t(len(cypher)), C.int32_t(len(params)))
+	C.free(unsafe.Pointer(cypherStr))
+	if res != C.BOLT_SUCCESS {
+		return -1, newError(connection, "unable to set cypher statement")
+	}
+
+	var index C.int32_t
+	for paramName, paramValue := range params {
+		paramNameLen := C.uint64_t(len(paramName))
+		paramNameStr := C.CString(paramName)
+
+		boltValue := C.BoltConnection_set_run_cypher_parameter(connection.cInstance, index, paramNameStr, paramNameLen)
+		C.free(unsafe.Pointer(paramNameStr))
+		if boltValue == nil {
+			return -1, newError(connection, "unable to retrieve reference to cypher statement parameter value")
+		}
+
+		if err := connection.valueSystem.valueAsConnector(boltValue, paramValue); err != nil {
+			return -1, connection.valueSystem.genericErrorFactory("unable to convert parameter %q to connector value for run message: %v", paramName, err)
+		}
+
+		index++
+	}
+
+	if len(bookmarks) > 0 {
+		bookmarksValue, err := connection.valueSystem.valueToConnector(bookmarks)
+		if err != nil {
+			return -1, connection.valueSystem.genericErrorFactory("unable to convert bookmarks to connector value for run message: %v", err)
+		}
+		res := C.BoltConnection_set_run_bookmarks(connection.cInstance, bookmarksValue)
+		C.BoltValue_destroy(bookmarksValue)
+		if res != C.BOLT_SUCCESS {
+			return -1, newError(connection, "unable to set bookmarks for run message")
+		}
+	}
+
+	if txTimeout > 0 {
+		timeOut := C.int64_t(txTimeout / time.Millisecond)
+		res := C.BoltConnection_set_run_tx_timeout(connection.cInstance, timeOut)
+		if res != C.BOLT_SUCCESS {
+			return -1, newError(connection, "unable to set tx timeout for run message")
+		}
+	}
+
+	if len(txMetadata) > 0 {
+		metadataValue, err := connection.valueSystem.valueToConnector(txMetadata)
+		if err != nil {
+			return -1, connection.valueSystem.genericErrorFactory("unable to convert tx metadata to connector value for run message: %v", err)
+		}
+		res := C.BoltConnection_set_run_tx_metadata(connection.cInstance, metadataValue)
+		C.BoltValue_destroy(metadataValue)
+		if res != C.BOLT_SUCCESS {
+			return -1, newError(connection, "unable to set tx metadata for run message")
+		}
+	}
+
+	res = C.BoltConnection_load_run_request(connection.cInstance)
+	if res != C.BOLT_SUCCESS {
+		return -1, newError(connection, "unable to generate run message")
+	}
+
+	return RequestHandle(C.BoltConnection_last_request(connection.cInstance)), nil
+}
+
+func (connection *seaboltConnection) PullAll() (RequestHandle, error) {
+	res := C.BoltConnection_load_pull_request(connection.cInstance, -1)
+	if res != C.BOLT_SUCCESS {
+		return -1, newError(connection, "unable to generate pullall message")
+	}
+	return RequestHandle(C.BoltConnection_last_request(connection.cInstance)), nil
+}
+
+func (connection *seaboltConnection) DiscardAll() (RequestHandle, error) {
+	res := C.BoltConnection_load_discard_request(connection.cInstance, -1)
+	if res != C.BOLT_SUCCESS {
+		return -1, newError(connection, "unable to generate discardall message")
+	}
+	return RequestHandle(C.BoltConnection_last_request(connection.cInstance)), nil
+}
+
+func (connection *seaboltConnection) assertReadyState() error {
+	cStatus := C.BoltConnection_status(connection.cInstance)
+
+	if C.BoltStatus_get_state(cStatus) != C.BOLT_CONNECTION_STATE_READY {
+		return newError(connection, "unexpected connection state")
+	}
+
+	return nil
+}
+
+func (connection *seaboltConnection) Flush() error {
+	res := C.BoltConnection_send(connection.cInstance)
+	if res < 0 {
+		return newError(connection, "unable to flush")
+	}
+
+	return connection.assertReadyState()
+}
+
+func (connection *seaboltConnection) Fetch(request RequestHandle) (FetchType, error) {
+	res := C.BoltConnection_fetch(connection.cInstance, C.BoltRequest(request))
+
+	if err := connection.assertReadyState(); err != nil {
+		return FetchTypeError, err
+	}
+
+	return FetchType(res), nil
+}
+
+func (connection *seaboltConnection) FetchSummary(request RequestHandle) (int, error) {
+	res := C.BoltConnection_fetch_summary(connection.cInstance, C.BoltRequest(request))
+	if res < 0 {
+		return -1, newError(connection, "unable to fetch summary")
+	}
+
+	err := connection.assertReadyState()
+	if err != nil {
+		return -1, err
+	}
+
+	return int(res), nil
+}
+
+func (connection *seaboltConnection) LastBookmark() (string, error) {
+	bookmark := C.BoltConnection_last_bookmark(connection.cInstance)
+	if bookmark != nil {
+		return C.GoString(bookmark), nil
+	}
+
+	return "", nil
+}
+
+func (connection *seaboltConnection) Fields() ([]string, error) {
+	fields, err := connection.valueSystem.valueAsGo(C.BoltConnection_field_names(connection.cInstance))
+	if err != nil {
+		return nil, err
+	}
+
+	if fields != nil {
+		fieldsAsList := fields.([]interface{})
+		fieldsAsStr := make([]string, len(fieldsAsList))
+		for i := range fieldsAsList {
+			fieldsAsStr[i] = fieldsAsList[i].(string)
+		}
+		return fieldsAsStr, nil
+	}
+
+	return nil, connection.valueSystem.genericErrorFactory("field names not available")
+}
+
+func (connection *seaboltConnection) Metadata() (map[string]interface{}, error) {
+	metadata, err := connection.valueSystem.valueAsGo(C.BoltConnection_metadata(connection.cInstance))
+	if err != nil {
+		return nil, err
+	}
+
+	if metadataAsGenericMap, ok := metadata.(map[string]interface{}); ok {
+		return metadataAsGenericMap, nil
+	}
+
+	return nil, connection.valueSystem.genericErrorFactory("metadata is not of expected type")
+}
+
+func (connection *seaboltConnection) Data() ([]interface{}, error) {
+	fields, err := connection.valueSystem.valueAsGo(C.BoltConnection_field_values(connection.cInstance))
+	if err != nil {
+		return nil, err
+	}
+
+	return fields.([]interface{}), nil
+}
+
+func (connection *seaboltConnection) Reset() (RequestHandle, error) {
+	res := C.BoltConnection_load_reset_request(connection.cInstance)
+	if res != C.BOLT_SUCCESS {
+		return -1, newError(connection, "unable to generate reset message")
+	}
+	return RequestHandle(C.BoltConnection_last_request(connection.cInstance)), nil
+}
+
+func (connection *seaboltConnection) Close() error {
+	C.BoltConnector_release(connection.connector.cInstance, connection.cInstance)
+	return nil
+}

vendor/github.com/neo4j-drivers/gobolt/connection_worker.go

+/*
+ * Copyright (c) 2002-2019 "Neo4j,"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package gobolt
+
+import (
+	"sync/atomic"
+	"time"
+)
+
+type job func()
+
+type workerConnection struct {
+	connector *workerConnector
+	pool      *workerPool
+	delegate  Connection
+	active    int32
+}
+
+var newWorkerConnection = func(connector *workerConnector, mode AccessMode) (*workerConnection, error) {
+	var err error
+	var startTime time.Time
+	var delegate *seaboltConnection
+	var connection *workerConnection
+
+	connection = &workerConnection{
+		connector: connector,
+		pool:      connector.pool,
+		delegate:  nil,
+		active:    0,
+	}
+
+	for connection.delegate == nil {
+		if startTime.IsZero() {
+			startTime = time.Now()
+		} else if time.Since(startTime) > connector.config.ConnAcquisitionTimeout {
+			return nil, newConnectionAcquisitionTimedOutError(connector.delegate.valueSystem)
+		}
+
+		if poolError := connection.queueJob(func() {
+			delegate, err = newSeaboltConnection(connector.delegate, mode)
+		}); poolError != nil {
+			err = poolError
+		}
+
+		if err != nil {
+			if isPoolFullError(err) && connector.config.ConnAcquisitionTimeout > 0 {
+				if waitClosed(connection, connector.config.ConnAcquisitionTimeout-time.Since(startTime)) {
+					continue
+				} else {
+					return nil, newConnectionAcquisitionTimedOutError(connector.delegate.valueSystem)
+				}
+			}
+
+			return nil, err
+		}
+
+		connection.delegate = delegate
+	}
+
+	return connection, nil
+}
+
+var waitClosed = func(w *workerConnection, timeout time.Duration) bool {
+	if w.connector != nil {
+		select {
+		case <-w.connector.closeSignal:
+			return true
+		case <-time.After(timeout):
+		}
+	}
+
+	return false
+}
+
+var signalClosed = func(w *workerConnection) {
+	if w.connector != nil {
+		select {
+		case w.connector.closeSignal <- signal{}:
+		default:
+		}
+	}
+}
+
+func (w *workerConnection) queueJob(item job) error {
+	if atomic.CompareAndSwapInt32(&w.active, 0, 1) {
+		defer atomic.StoreInt32(&w.active, 0)
+
+		var done = make(chan bool, 1)
+		defer close(done)
+
+		if err := w.pool.submit(func(stopper <-chan signal) {
+			item()
+			done <- true
+		}); err != nil {
+			return err
+		}
+
+		<-done
+
+		return nil
+	}
+
+	return newGenericError("a connection is not thread-safe and thus should not be used concurrently")
+}
+
+func (w *workerConnection) Id() (string, error) {
+	var id string
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		id, err = w.delegate.Id()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return id, err
+}
+
+func (w *workerConnection) RemoteAddress() (string, error) {
+	var remoteAddress string
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		remoteAddress, err = w.delegate.RemoteAddress()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return remoteAddress, err
+}
+
+func (w *workerConnection) Server() (string, error) {
+	var server string
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		server, err = w.delegate.Server()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return server, err
+}
+
+func (w *workerConnection) Begin(bookmarks []string, txTimeout time.Duration, txMetadata map[string]interface{}) (RequestHandle, error) {
+	var handle RequestHandle
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		handle, err = w.delegate.Begin(bookmarks, txTimeout, txMetadata)
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return handle, err
+}
+
+func (w *workerConnection) Commit() (RequestHandle, error) {
+	var handle RequestHandle
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		handle, err = w.delegate.Commit()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return handle, err
+}
+
+func (w *workerConnection) Rollback() (RequestHandle, error) {
+	var handle RequestHandle
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		handle, err = w.delegate.Rollback()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return handle, err
+}
+
+func (w *workerConnection) Run(cypher string, args map[string]interface{}, bookmarks []string, txTimeout time.Duration, txMetadata map[string]interface{}) (RequestHandle, error) {
+	var handle RequestHandle
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		handle, err = w.delegate.Run(cypher, args, bookmarks, txTimeout, txMetadata)
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return handle, err
+}
+
+func (w *workerConnection) PullAll() (RequestHandle, error) {
+	var handle RequestHandle
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		handle, err = w.delegate.PullAll()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return handle, err
+}
+
+func (w *workerConnection) DiscardAll() (RequestHandle, error) {
+	var handle RequestHandle
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		handle, err = w.delegate.DiscardAll()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return handle, err
+}
+
+func (w *workerConnection) Reset() (RequestHandle, error) {
+	var handle RequestHandle
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		handle, err = w.delegate.Reset()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return handle, err
+}
+
+func (w *workerConnection) Flush() error {
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		err = w.delegate.Flush()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return err
+}
+
+func (w *workerConnection) Fetch(request RequestHandle) (FetchType, error) {
+	var fetched FetchType
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		fetched, err = w.delegate.Fetch(request)
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return fetched, err
+}
+
+func (w *workerConnection) FetchSummary(request RequestHandle) (int, error) {
+	var fetched int
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		fetched, err = w.delegate.FetchSummary(request)
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return fetched, err
+}
+
+func (w *workerConnection) LastBookmark() (string, error) {
+	var bookmark string
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		bookmark, err = w.delegate.LastBookmark()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return bookmark, err
+}
+
+func (w *workerConnection) Fields() ([]string, error) {
+	var fields []string
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		fields, err = w.delegate.Fields()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return fields, err
+}
+
+func (w *workerConnection) Metadata() (map[string]interface{}, error) {
+	var metadata map[string]interface{}
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		metadata, err = w.delegate.Metadata()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return metadata, err
+}
+
+func (w *workerConnection) Data() ([]interface{}, error) {
+	var data []interface{}
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		data, err = w.delegate.Data()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	return data, err
+}
+
+func (w *workerConnection) Close() error {
+	var err error
+
+	if otherErr := w.queueJob(func() {
+		err = w.delegate.Close()
+	}); otherErr != nil {
+		err = otherErr
+	}
+
+	signalClosed(w)
+
+	return err
+}

vendor/github.com/neo4j-drivers/gobolt/connection_worker_test.go

+/*
+ * Copyright (c) 2002-2019 "Neo4j,"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package gobolt
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_WorkerConnection(t *testing.T) {
+	newMockedConnection := func() (*workerConnection, *mockConnection, func()) {
+		pool := newWorkerPool(1, 1, 1*time.Minute)
+		delegate := new(mockConnection)
+		connection := &workerConnection{
+			pool:     pool,
+			delegate: delegate,
+			active:   0,
+		}
+
+		return connection, delegate, func() {
+			pool.close()
+		}
+	}
+
+	newMockedConnectionInUse := func() (*workerConnection, *mockConnection, func()) {
+		conn, mocked, cleanup := newMockedConnection()
+
+		conn.active = 1
+
+		return conn, mocked, cleanup
+	}
+
+	t.Run("newWorkerConnection", func(t *testing.T) {
+		var valueSystem = createValueSystem(&Config{})
+		var someOtherFailure = fmt.Errorf("some other failure")
+		var poolFullError = newPoolFullError(valueSystem)
+		var connectionAcquisitionTimedOutError = newConnectionAcquisitionTimedOutError(valueSystem)
+
+		t.Run("shouldInvokeNewSeaboltConnection", func(t *testing.T) {
+			var cases = []struct {
+				name    string
+				timeout time.Duration
+			}{
+				{"AcquisitionTimeout=0", 0},
+				{"AcquisitionTimeout=5s", 5 * time.Second},
+			}
+
+			for _, testCase := range cases {
+				t.Run(testCase.name, func(t *testing.T) {
+					var originalNewSeaboltConnection = newSeaboltConnection
+					defer func() {
+						newSeaboltConnection = originalNewSeaboltConnection
+					}()
+
+					var newSeaboltConnectionCount = 0
+					newSeaboltConnection = func(connector *seaboltConnector, mode AccessMode) (*seaboltConnection, error) {
+						newSeaboltConnectionCount++
+						return &seaboltConnection{}, nil
+					}
+
+					var connector = &workerConnector{
+						config: Config{ConnAcquisitionTimeout: testCase.timeout},
+						pool:   newWorkerPool(1, 1, 1*time.Minute),
+					}
+					defer connector.pool.close()
+
+					connection, err := newWorkerConnection(connector, AccessModeRead)
+
+					assert.NoError(t, err)
+					assert.NotNil(t, connection)
+					assert.Equal(t, 1, newSeaboltConnectionCount)
+				})
+			}
+		})
+
+		t.Run("shouldReturnErrorFromNewSeaboltConnection", func(t *testing.T) {
+			var originalNewSeaboltConnection = newSeaboltConnection
+			defer func() {
+				newSeaboltConnection = originalNewSeaboltConnection
+			}()
+
+			var newSeaboltConnectionCount = 0
+			newSeaboltConnection = func(connector *seaboltConnector, mode AccessMode) (*seaboltConnection, error) {
+				newSeaboltConnectionCount++
+				return nil, someOtherFailure
+			}
+
+			var connector = &workerConnector{
+				config: Config{ConnAcquisitionTimeout: 0},
+				pool:   newWorkerPool(1, 1, 1*time.Minute),
+			}
+			defer connector.pool.close()
+
+			connection, err := newWorkerConnection(connector, AccessModeRead)
+
+			assert.EqualError(t, err, "some other failure")
+			assert.Nil(t, connection)
+			assert.Equal(t, 1, newSeaboltConnectionCount)
+		})
+
+		t.Run("shouldReturnPoolFullErrorWhenAcquisitionTimeoutIsZero", func(t *testing.T) {
+			var originalNewSeaboltConnection = newSeaboltConnection
+			defer func() {
+				newSeaboltConnection = originalNewSeaboltConnection
+			}()
+
+			var newSeaboltConnectionCount = 0
+			newSeaboltConnection = func(connector *seaboltConnector, mode AccessMode) (*seaboltConnection, error) {
+				newSeaboltConnectionCount++
+				return nil, poolFullError
+			}
+
+			var connector = &workerConnector{
+				config: Config{ConnAcquisitionTimeout: 0},
+				pool:   newWorkerPool(1, 1, 1*time.Minute),
+			}
+			defer connector.pool.close()
+
+			connection, err := newWorkerConnection(connector, AccessModeRead)
+
+			assert.EqualError(t, err, poolFullError.Error())
+			assert.Nil(t, connection)
+			assert.Equal(t, 1, newSeaboltConnectionCount)
+		})
+
+		t.Run("shouldInvokeWaitClosedWhenPoolIsFullAndSucceedWhenWaitSucceeds", func(t *testing.T) {
+			var originalNewSeaboltConnection = newSeaboltConnection
+			var originalWaitClosed = waitClosed
+			defer func() {
+				newSeaboltConnection = originalNewSeaboltConnection
+				waitClosed = originalWaitClosed
+			}()
+
+			var newSeaboltConnectionCount = 0
+			newSeaboltConnection = func(connector *seaboltConnector, mode AccessMode) (*seaboltConnection, error) {
+				newSeaboltConnectionCount++
+				if newSeaboltConnectionCount > 1 {
+					return &seaboltConnection{}, nil
+				}
+				return nil, poolFullError
+			}
+
+			var waitClosedCount = 0
+			waitClosed = func(w *workerConnection, timeout time.Duration) bool {
+				waitClosedCount++
+				return true
+			}
+
+			var connector = &workerConnector{
+				config: Config{ConnAcquisitionTimeout: 5 * time.Second},
+				pool:   newWorkerPool(1, 1, 1*time.Minute),
+			}
+			defer connector.pool.close()
+
+			connection, err := newWorkerConnection(connector, AccessModeRead)
+
+			assert.NoError(t, err)
+			assert.NotNil(t, connection)
+			assert.Equal(t, 1, waitClosedCount)
+			assert.Equal(t, 2, newSeaboltConnectionCount)
+		})
+
+		t.Run("shouldInvokeWaitClosedWhenPoolIsFullAndFailWhenWaitFails", func(t *testing.T) {
+			var originalNewSeaboltConnection = newSeaboltConnection
+			var originalWaitClosed = waitClosed
+			defer func() {
+				newSeaboltConnection = originalNewSeaboltConnection
+				waitClosed = originalWaitClosed
+			}()
+
+			var newSeaboltConnectionCount = 0
+			newSeaboltConnection = func(connector *seaboltConnector, mode AccessMode) (*seaboltConnection, error) {
+				newSeaboltConnectionCount++
+				return nil, poolFullError
+			}
+
+			var waitClosedCount = 0
+			waitClosed = func(w *workerConnection, timeout time.Duration) bool {
+				waitClosedCount++
+				return false
+			}
+
+			var connector = &workerConnector{
+				config: Config{ConnAcquisitionTimeout: 5 * time.Second},
+				pool:   newWorkerPool(1, 1, 1*time.Minute),
+				delegate: &seaboltConnector{
+					valueSystem: valueSystem,
+				},
+			}
+			defer connector.pool.close()
+
+			connection, err := newWorkerConnection(connector, AccessModeRead)
+
+			assert.EqualError(t, err, connectionAcquisitionTimedOutError.Error())
+			assert.Nil(t, connection)
+			assert.Equal(t, 1, waitClosedCount)
+			assert.Equal(t, 1, newSeaboltConnectionCount)
+		})
+	})
+
+	t.Run("shouldInvokeSignalClosedOnClose", func(t *testing.T) {
+		var originalSignalClosed = signalClosed
+		defer func() {
+			signalClosed = originalSignalClosed
+		}()
+
+		var signalClosedCount = 0
+		signalClosed = func(w *workerConnection) {
+			signalClosedCount++
+		}
+
+		conn, delegate, cleanup := newMockedConnection()
+		defer cleanup()
+
+		delegate.On("Close").Return(nil)
+
+		assert.NoError(t, conn.Close())
+		assert.Equal(t, 1, signalClosedCount)
+	})
+
+	t.Run("shouldSurfacePoolFullErrorWhenAcquisitionTimeoutIsZero", func(t *testing.T) {
+
+	})
+
+	t.Run("shouldInterceptPoolFullErrorWhenAcquisitionTimeoutIsNotZero", func(t *testing.T) {
+
+	})
+
+	t.Run("shouldInvokeDelegate", func(t *testing.T) {
+		failure := fmt.Errorf("some error")
+		handle := RequestHandle(500)
+
+		t.Run("Id", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			delegate.On("Id").Return("123", failure)
+
+			id, err := conn.Id()
+			assert.Equal(t, "123", id)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("RemoteAddress", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			delegate.On("RemoteAddress").Return("localhost:7687", failure)
+
+			remoteAddress, err := conn.RemoteAddress()
+			assert.Equal(t, "localhost:7687", remoteAddress)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("Server", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			delegate.On("Server").Return("Neo4j/3.5.0", failure)
+
+			server, err := conn.Server()
+			assert.Equal(t, "Neo4j/3.5.0", server)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("Begin", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			bookmarks := []string{"1", "2", "3"}
+			txTimeout := 5 * time.Minute
+			txMetadata := map[string]interface{}{"a": 1, "b": true, "c": "yes"}
+			delegate.On("Begin", bookmarks, txTimeout, txMetadata).Return(handle, failure)
+
+			beginHandle, err := conn.Begin(bookmarks, txTimeout, txMetadata)
+			assert.Equal(t, handle, beginHandle)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("Commit", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			delegate.On("Commit").Return(handle, failure)
+
+			commitHandle, err := conn.Commit()
+			assert.Equal(t, handle, commitHandle)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("Rollback", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			delegate.On("Rollback").Return(handle, failure)
+
+			rollbackHandle, err := conn.Rollback()
+			assert.Equal(t, handle, rollbackHandle)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("Run", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			cypher := "CREATE (n {id: $x})"
+			parameters := map[string]interface{}{"id": 5000}
+			bookmarks := []string{"1", "2", "3"}
+			txTimeout := 5 * time.Minute
+			txMetadata := map[string]interface{}{"a": 1, "b": true, "c": "yes"}
+			delegate.On("Run", cypher, parameters, bookmarks, txTimeout, txMetadata).Return(handle, failure)
+
+			runHandle, err := conn.Run(cypher, parameters, bookmarks, txTimeout, txMetadata)
+			assert.Equal(t, handle, runHandle)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("PullAll", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			delegate.On("PullAll").Return(handle, failure)
+
+			pullAllHandle, err := conn.PullAll()
+			assert.Equal(t, handle, pullAllHandle)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("DiscardAll", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			delegate.On("DiscardAll").Return(handle, failure)
+
+			discardAllHandle, err := conn.DiscardAll()
+			assert.Equal(t, handle, discardAllHandle)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("Reset", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			delegate.On("Reset").Return(handle, failure)
+
+			resetHandle, err := conn.Reset()
+			assert.Equal(t, handle, resetHandle)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("Flush", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			delegate.On("Flush").Return(failure)
+
+			err := conn.Flush()
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("Fetch", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			delegate.On("Fetch", handle).Return(FetchTypeRecord, failure)
+
+			fetched, err := conn.Fetch(handle)
+			assert.Equal(t, FetchTypeRecord, fetched)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("FetchSummary", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			delegate.On("FetchSummary", handle).Return(50, failure)
+
+			records, err := conn.FetchSummary(handle)
+			assert.Equal(t, 50, records)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("LastBookmark", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			delegate.On("LastBookmark").Return("bookmark:1234", failure)
+
+			bookmark, err := conn.LastBookmark()
+			assert.Equal(t, "bookmark:1234", bookmark)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("Fields", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			fields := []string{"x", "y", "z"}
+			delegate.On("Fields").Return(fields, failure)
+
+			fieldsReturned, err := conn.Fields()
+			assert.Equal(t, fields, fieldsReturned)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("Metadata", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			metadata := map[string]interface{}{"x": 1, "y": "a", "z": false}
+			delegate.On("Metadata").Return(metadata, failure)
+
+			metadataReturned, err := conn.Metadata()
+			assert.Equal(t, metadata, metadataReturned)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("Data", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			data := []interface{}{"1", 2, false}
+			delegate.On("Data").Return(data, failure)
+
+			dataReturned, err := conn.Data()
+			assert.Equal(t, data, dataReturned)
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+		t.Run("Close", func(t *testing.T) {
+			conn, delegate, cleanup := newMockedConnection()
+			defer cleanup()
+
+			delegate.On("Close").Return(failure)
+
+			err := conn.Close()
+			assert.Equal(t, failure, err)
+
+			delegate.AssertExpectations(t)
+		})
+
+	})
+
+	t.Run("shouldPropagateWorkerError", func(t *testing.T) {
+		errText := "a connection is not thread-safe and thus should not be used concurrently"
+		t.Run("Id", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.Id()
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("RemoteAddress", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.RemoteAddress()
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("Server", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.Server()
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("Begin", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.Begin([]string{}, 1*time.Minute, nil)
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("Commit", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.Commit()
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("Rollback", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.Rollback()
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("Run", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.Run("RETURN 1", nil, nil, 1*time.Second, nil)
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("PullAll", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.PullAll()
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("DiscardAll", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.DiscardAll()
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("Reset", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.Reset()
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("Flush", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			err := conn.Flush()
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("Fetch", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.Fetch(RequestHandle(1))
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("FetchSummary", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.FetchSummary(RequestHandle(1))
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("LastBookmark", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.LastBookmark()
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("Fields", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.Fields()
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("Metadata", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.Metadata()
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("Data", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			_, err := conn.Data()
+			assert.EqualError(t, err, errText)
+		})
+
+		t.Run("Close", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnectionInUse()
+			defer cleanup()
+
+			err := conn.Close()
+			assert.EqualError(t, err, errText)
+		})
+
+	})
+
+	t.Run("queueJob", func(t *testing.T) {
+		t.Run("shouldSetReceivingToOneWhenExecuting", func(t *testing.T) {
+			var startEvent = make(chan bool, 1)
+			var waitEvent = make(chan bool, 1)
+			var blockingJob = func() {
+				startEvent <- true
+				<-waitEvent
+			}
+
+			conn, _, cleanup := newMockedConnection()
+			defer cleanup()
+			defer close(waitEvent)
+			defer close(startEvent)
+
+			go conn.queueJob(blockingJob)
+
+			<-startEvent
+
+			assert.Equal(t, int32(1), conn.active)
+		})
+
+		t.Run("shouldSetReceivingToZeroWhenExecutionIsComplete", func(t *testing.T) {
+			conn, _, cleanup := newMockedConnection()
+			defer cleanup()
+
+			conn.queueJob(func() {})
+
+			assert.Equal(t, int32(0), conn.active)
+		})
+
+		t.Run("shouldCheckForConcurrentAccess", func(t *testing.T) {
+			var startEvent = make(chan bool, 1)
+			var waitEvent = make(chan bool, 1)
+			var blockingJob = func() {
+				startEvent <- true
+				<-waitEvent
+			}
+
+			conn, _, cleanup := newMockedConnection()
+			defer cleanup()
+			defer close(waitEvent)
+			defer close(startEvent)
+
+			go conn.queueJob(blockingJob)
+
+			<-startEvent
+
+			err := conn.queueJob(blockingJob)
+
+			assert.EqualError(t, err, "a connection is not thread-safe and thus should not be used concurrently")
+		})
+	})
+}

vendor/github.com/neo4j-drivers/gobolt/connector.go

+/*
+ * Copyright (c) 2002-2019 "Neo4j,"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package gobolt
+
+import (
+	"net/url"
+)
+
+// AccessMode is used by the routing driver to decide if a transaction should be routed to a write server
+// or a read server in a cluster. When running a transaction, a write transaction requires a server that
+// supports writes. A read transaction, on the other hand, requires a server that supports read operations.
+// This classification is key for routing driver to route transactions to a cluster correctly.
+type AccessMode int
+
+const (
+	// AccessModeWrite makes the driver return a session towards a write server
+	AccessModeWrite AccessMode = 0
+	// AccessModeRead makes the driver return a session towards a follower or a read-replica
+	AccessModeRead AccessMode = 1
+)
+
+// Connector represents an initialised seabolt connector
+type Connector interface {
+	Acquire(mode AccessMode) (Connection, error)
+	Close() error
+}
+
+func NewConnector(uri *url.URL, authToken map[string]interface{}, config *Config) (Connector, error) {
+	if workersEnabled() {
+		return newWorkerConnector(uri, authToken, config)
+	} else {
+		return newSeaboltConnector(uri, authToken, config)
+	}
+}

vendor/github.com/neo4j-drivers/gobolt/connector_seabolt.go

+/*
+ * Copyright (c) 2002-2019 "Neo4j,"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package gobolt
+
+/*
+#include <stdlib.h>
+
+#include "bolt/bolt.h"
+*/
+import "C"
+import (
+	"errors"
+	"net/url"
+	"reflect"
+	"unsafe"
+)
+
+type seaboltConnector struct {
+	key int
+
+	uri       *url.URL
+	authToken map[string]interface{}
+	config    Config
+
+	cAddress    *C.BoltAddress
+	cInstance   *C.BoltConnector
+	valueSystem *boltValueSystem
+}
+
+func (conn *seaboltConnector) Close() error {
+	if conn.cInstance != nil {
+		C.BoltConnector_destroy(conn.cInstance)
+		conn.cInstance = nil
+	}
+
+	if conn.cAddress != nil {
+		C.BoltAddress_destroy(conn.cAddress)
+		conn.cAddress = nil
+	}
+
+	unregisterLogging(conn.key)
+	unregisterResolver(conn.key)
+
+	shutdownLibrary()
+
+	return nil
+}
+
+func (conn *seaboltConnector) Acquire(mode AccessMode) (Connection, error) {
+	return newSeaboltConnection(conn, mode)
+}
+
+// NewConnector returns a new connector instance with given parameters
+func newSeaboltConnector(uri *url.URL, authToken map[string]interface{}, config *Config) (*seaboltConnector, error) {
+	var err error
+	var key int
+	var cAddress *C.struct_BoltAddress
+	var valueSystem *boltValueSystem
+	var cAuthToken *C.struct_BoltValue
+	var cConfig *C.struct_BoltConfig
+
+	if uri == nil {
+		return nil, errors.New("provided uri should not be nil")
+	}
+
+	if config == nil {
+		config = &Config{
+			Encryption:  true,
+			MaxPoolSize: 100,
+		}
+	}
+
+	valueSystem = createValueSystem(config)
+	cAddress = createAddress(uri)
+	key = startupLibrary()
+
+	if cAuthToken, err = valueSystem.valueToConnector(authToken); err != nil {
+		return nil, valueSystem.genericErrorFactory("unable to convert authentication token: %v", err)
+	}
+	defer C.BoltValue_destroy(cAuthToken)
+
+	if cConfig, err = createConfig(key, uri, config, valueSystem); err != nil {
+		return nil, err
+	}
+	defer C.BoltConfig_destroy(cConfig)
+
+	cInstance := C.BoltConnector_create(cAddress, cAuthToken, cConfig)
+	conn := &seaboltConnector{
+		key:         key,
+		uri:         uri,
+		authToken:   authToken,
+		config:      *config,
+		cAddress:    cAddress,
+		valueSystem: valueSystem,
+		cInstance:   cInstance,
+	}
+
+	return conn, nil
+}
+
+func createValueSystem(config *Config) *boltValueSystem {
+	valueHandlersBySignature := make(map[int16]ValueHandler, len(config.ValueHandlers))
+	valueHandlersByType := make(map[reflect.Type]ValueHandler, len(config.ValueHandlers))
+	for _, handler := range config.ValueHandlers {
+		for _, readSignature := range handler.ReadableStructs() {
+			valueHandlersBySignature[readSignature] = handler
+		}
+
+		for _, writeType := range handler.WritableTypes() {
+			valueHandlersByType[writeType] = handler
+		}
+	}
+
+	databaseErrorFactory := newDatabaseError
+	connectorErrorFactory := newConnectorError
+	genericErrorFactory := newGenericError
+	if config.DatabaseErrorFactory != nil {
+		databaseErrorFactory = config.DatabaseErrorFactory
+	}
+	if config.ConnectorErrorFactory != nil {
+		connectorErrorFactory = config.ConnectorErrorFactory
+	}
+	if config.GenericErrorFactory != nil {
+		genericErrorFactory = config.GenericErrorFactory
+	}
+
+	return &boltValueSystem{
+		valueHandlers:            config.ValueHandlers,
+		valueHandlersBySignature: valueHandlersBySignature,
+		valueHandlersByType:      valueHandlersByType,
+		connectorErrorFactory:    connectorErrorFactory,
+		databaseErrorFactory:     databaseErrorFactory,
+		genericErrorFactory:      genericErrorFactory,
+	}
+}
+
+func createAddress(uri *url.URL) *C.struct_BoltAddress {
+	var hostname = C.CString(uri.Hostname())
+	var port = C.CString(uri.Port())
+	defer C.free(unsafe.Pointer(hostname))
+	defer C.free(unsafe.Pointer(port))
+
+	return C.BoltAddress_create(hostname, port)
+}

vendor/github.com/neo4j-drivers/gobolt/connector_worker.go

+/*
+ * Copyright (c) 2002-2019 "Neo4j,"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package gobolt
+
+import (
+	"net/url"
+	"os"
+	"strconv"
+	"time"
+)
+
+type workerConnector struct {
+	config      Config
+	delegate    *seaboltConnector
+	pool        *workerPool
+	closeSignal chan signal
+}
+
+func (w *workerConnector) Acquire(mode AccessMode) (Connection, error) {
+	return newWorkerConnection(w, mode)
+}
+
+func (w *workerConnector) Close() error {
+	var err error
+
+	var done = make(chan bool, 1)
+	if poolErr := w.pool.submit(func(stopper <-chan signal) {
+		err = w.delegate.Close()
+		done <- true
+	}); poolErr != nil {
+		err = poolErr
+		done <- true
+	}
+
+	<-done
+
+	if err != nil {
+		return err
+	}
+
+	w.pool.close()
+	close(w.closeSignal)
+
+	return nil
+}
+
+func newWorkerConnector(url *url.URL, authToken map[string]interface{}, config *Config) (Connector, error) {
+	var err error
+	var connector *seaboltConnector
+	var pool = newWorkerPool(minWorkers(config), maxWorkers(config), keepAlive(config))
+
+	var configOverride = *config
+	configOverride.ConnAcquisitionTimeout = 0
+
+	var done = make(chan bool, 1)
+	if poolErr := pool.submit(func(stopper <-chan signal) {
+		connector, err = newSeaboltConnector(url, authToken, &configOverride)
+		done <- true
+	}); poolErr != nil {
+		err = poolErr
+		done <- true
+	}
+
+	// wait for connector creation to complete
+	<-done
+
+	if err != nil {
+		defer pool.close()
+		return nil, err
+	}
+
+	return &workerConnector{
+		config:      *config,
+		delegate:    connector,
+		pool:        pool,
+		closeSignal: make(chan signal, config.MaxPoolSize),
+	}, nil
+}
+
+func workersEnabled() bool {
+	var workersEnabled = true
+	if val, ok := os.LookupEnv("BOLTWORKERS"); ok {
+		if parsed, err := strconv.ParseBool(val); err == nil {
+			workersEnabled = parsed
+		}
+	}
+	return workersEnabled
+}
+
+func maxWorkers(config *Config) int {
+	var workersMax = int(float64(config.MaxPoolSize) * float64(1.2))
+	if val, ok := os.LookupEnv("BOLTWORKERSMAX"); ok {
+		if parsed, err := strconv.ParseInt(val, 10, 32); err == nil {
+			workersMax = int(parsed)
+		}
+	}
+	return workersMax
+}
+
+func minWorkers(config *Config) int {
+	var workersMin = 0
+	if val, ok := os.LookupEnv("BOLTWORKERSMIN"); ok {
+		if parsed, err := strconv.ParseInt(val, 10, 32); err == nil {
+			workersMin = int(parsed)
+		}
+	}
+	return workersMin
+}
+
+func keepAlive(config *Config) time.Duration {
+	var workersKeepAlive = 5 * time.Minute
+	if val, ok := os.LookupEnv("BOLTWORKERSKEEPALIVE"); ok {
+		if parsed, err := time.ParseDuration(val); err == nil {
+			workersKeepAlive = parsed
+		}
+	}
+	return workersKeepAlive
+}

vendor/github.com/neo4j-drivers/gobolt/error.go

+/*
+ * Copyright (c) 2002-2019 "Neo4j,"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package gobolt
+
+/*
+#include "bolt/bolt.h"
+*/
+import "C"
+import (
+	"fmt"
+	"strings"
+)
+
+// BoltError is a marker interface to identify neo4j errors
+type BoltError interface {
+	BoltError() bool
+}
+
+// DatabaseError represents errors returned from the server a FAILURE messages
+type DatabaseError interface {
+	// Classification returns classification of the error returned from the database
+	Classification() string
+	// Code returns code of the error returned from the database
+	Code() string
+	// Message returns message of the error returned from the database
+	Message() string
+	// Error returns textual representation of the error returned from the database
+	Error() string
+}
+
+// ConnectorError represents errors that occur on the connector/client side, like network errors, etc.
+type ConnectorError interface {
+	// State returns the state of the related connection
+	State() int
+	// Code returns the error code set on the related connection
+	Code() int
+	// Context returns the error context set by the connector
+	Context() string
+	// Description returns any additional description set
+	Description() string
+	// Error returns textual representation of the connector level error
+	Error() string
+}
+
+// GenericError represents errors which originates from the connector wrapper itself
+type GenericError interface {
+	// Message returns the underlying error message
+	Message() string
+	// Error returns textual representation of the generic error
+	Error() string
+}
+
+type defaultDatabaseError struct {
+	classification string
+	code           string
+	message        string
+}
+
+type defaultConnectorError struct {
+	state       int
+	code        int
+	codeText    string
+	context     string
+	description string
+}
+
+type defaultGenericError struct {
+	message string
+}
+
+func (failure *defaultDatabaseError) BoltError() bool {
+	return true
+}
+
+func (failure *defaultDatabaseError) Classification() string {
+	return failure.classification
+}
+
+func (failure *defaultDatabaseError) Code() string {
+	return failure.code
+}
+
+func (failure *defaultDatabaseError) Message() string {
+	return failure.message
+}
+
+func (failure *defaultDatabaseError) Error() string {
+	return fmt.Sprintf("database returned error [%s]: %s", failure.code, failure.message)
+}
+
+func (failure *defaultConnectorError) BoltError() bool {
+	return true
+}
+
+func (failure *defaultConnectorError) State() int {
+	return failure.state
+}
+
+func (failure *defaultConnectorError) Code() int {
+	return failure.code
+}
+
+func (failure *defaultConnectorError) Context() string {
+	return failure.context
+}
+
+func (failure *defaultConnectorError) Description() string {
+	return failure.description
+}
+
+func (failure *defaultConnectorError) Error() string {
+	if failure.description != "" {
+		return fmt.Sprintf("%s: error: [%d] %s, state: %d, context: %s", failure.description, failure.code, failure.codeText, failure.state, failure.context)
+	}
+
+	return fmt.Sprintf("error: [%d] %s, state: %d, context: %s", failure.code, failure.codeText, failure.state, failure.context)
+}
+
+func (failure *defaultGenericError) BoltError() bool {
+	return true
+}
+
+func (failure *defaultGenericError) Message() string {
+	return failure.message
+}
+
+func (failure *defaultGenericError) Error() string {
+	return failure.message
+}
+
+func newError(connection *seaboltConnection, description string) error {
+	cStatus := C.BoltConnection_status(connection.cInstance)
+	errorCode := C.BoltStatus_get_error(cStatus)
+
+	if errorCode == C.BOLT_SERVER_FAILURE {
+		failure, err := connection.valueSystem.valueAsDictionary(C.BoltConnection_failure(connection.cInstance))
+		if err != nil {
+			return connection.valueSystem.genericErrorFactory("unable to construct database error: %s", err.Error())
+		}
+
+		var ok bool
+		var codeInt, messageInt interface{}
+		var code, message string
+
+		if codeInt, ok = failure["code"]; !ok {
+			return connection.valueSystem.genericErrorFactory("expected 'code' key to be present in map '%v'", failure)
+		}
+		if code, ok = codeInt.(string); !ok {
+			return connection.valueSystem.genericErrorFactory("expected 'code' value to be of type 'string': '%v'", codeInt)
+		}
+
+		if messageInt, ok = failure["message"]; !ok {
+			return connection.valueSystem.genericErrorFactory("expected 'message' key to be present in map '%v'", failure)
+		}
+		if message, ok = messageInt.(string); !ok {
+			return connection.valueSystem.genericErrorFactory("expected 'message' value to be of type 'string': '%v'", messageInt)
+		}
+
+		classification := ""
+		if codeParts := strings.Split(code, "."); len(codeParts) >= 2 {
+			classification = codeParts[1]
+		}
+
+		return connection.valueSystem.databaseErrorFactory(classification, code, message)
+	}
+
+	state := C.BoltStatus_get_state(cStatus)
+	errorText := C.GoString(C.BoltError_get_string(errorCode))
+	context := C.GoString(C.BoltStatus_get_error_context(cStatus))
+
+	return connection.valueSystem.connectorErrorFactory(int(state), int(errorCode), errorText, context, description)
+}
+
+func newGenericError(format string, args ...interface{}) GenericError {
+	return &defaultGenericError{message: fmt.Sprintf(format, args...)}
+}
+
+func newDatabaseError(classification, code, message string) DatabaseError {
+	return &defaultDatabaseError{code: code, message: message, classification: classification}
+}
+
+func newConnectorError(state int, code int, codeText, context, description string) ConnectorError {
+	return &defaultConnectorError{state: state, code: code, codeText: codeText, context: context, description: description}
+}
+
+// IsDatabaseError checkes whether given err is a DatabaseError
+func IsDatabaseError(err error) bool {
+	if _, ok := err.(DatabaseError); !ok {
+		return false
+	}
+
+	if _, ok := err.(BoltError); !ok {
+		return false
+	}
+
+	return true
+}
+
+// IsConnectorError checkes whether given err is a ConnectorError
+func IsConnectorError(err error) bool {
+	if _, ok := err.(ConnectorError); !ok {
+		return false
+	}
+
+	if _, ok := err.(BoltError); !ok {
+		return false
+	}
+
+	return true
+}
+
+// IsGenericError checkes whether given err is a GenericError
+func IsGenericError(err error) bool {
+	if _, ok := err.(GenericError); !ok {
+		return false
+	}
+
+	if _, ok := err.(BoltError); !ok {
+		return false
+	}
+
+	return true
+}
+
+// IsTransientError checks whether given err is a transient error
+func IsTransientError(err error) bool {
+	if _, ok := err.(BoltError); !ok {
+		return false
+	}
+
+	if dbErr, ok := err.(DatabaseError); ok {
+		if dbErr.Classification() == "TransientError" {
+			switch dbErr.Code() {
+			case "Neo.TransientError.Transaction.Terminated":
+				fallthrough
+			case "Neo.TransientError.Transaction.LockClientStopped":
+				return false
+			}
+
+			return true
+		}
+	}
+
+	return false
+}
+
+// IsWriteError checks whether given err can be classified as a write error
+func IsWriteError(err error) bool {
+	if _, ok := err.(BoltError); !ok {
+		return false
+	}
+
+	if dbErr, ok := err.(DatabaseError); ok {
+		switch dbErr.Code() {
+		case "Neo.ClientError.Cluster.NotALeader":
+			fallthrough
+		case "Neo.ClientError.General.ForbiddenOnReadOnlyDatabase":
+			return true
+		}
+	}
+
+	return false
+}
+
+// IsServiceUnavailable checkes whether given err represents a service unavailable status
+func IsServiceUnavailable(err error) bool {
+	if _, ok := err.(BoltError); !ok {
+		return false
+	}
+
+	if connErr, ok := err.(ConnectorError); ok {
+		switch connErr.Code() {
+		case C.BOLT_INTERRUPTED:
+			fallthrough
+		case C.BOLT_CONNECTION_RESET:
+			fallthrough
+		case C.BOLT_NO_VALID_ADDRESS:
+			fallthrough
+		case C.BOLT_TIMED_OUT:
+			fallthrough
+		case C.BOLT_CONNECTION_REFUSED:
+			fallthrough
+		case C.BOLT_NETWORK_UNREACHABLE:
+			fallthrough
+		case C.BOLT_TLS_ERROR:
+			fallthrough
+		case C.BOLT_END_OF_TRANSMISSION:
+			fallthrough
+		case C.BOLT_POOL_FULL:
+			fallthrough
+		case C.BOLT_ADDRESS_NOT_RESOLVED:
+			fallthrough
+		case C.BOLT_ROUTING_UNABLE_TO_RETRIEVE_ROUTING_TABLE:
+			fallthrough
+		case C.BOLT_ROUTING_UNABLE_TO_REFRESH_ROUTING_TABLE:
+			fallthrough
+		case C.BOLT_ROUTING_NO_SERVERS_TO_SELECT:
+			return true
+		}
+	}
+
+	return false
+}
+
+func IsSecurityError(err error) bool {
+	if _, ok := err.(BoltError); !ok {
+		return false
+	}
+
+	if connErr, ok := err.(ConnectorError); ok {
+		return connErr.Code() == C.BOLT_TLS_ERROR
+	}
+
+	return IsAuthenticationError(err)
+}
+
+func IsAuthenticationError(err error) bool {
+	if _, ok := err.(BoltError); !ok {
+		return false
+	}
+
+	if connErr, ok := err.(ConnectorError); ok {
+		return connErr.Code() == C.BOLT_PERMISSION_DENIED
+	}
+
+	if dbErr, ok := err.(DatabaseError); ok {
+		return dbErr.Code() == "Neo.ClientError.Security.Unauthorized"
+	}
+
+	return false
+}
+
+func IsClientError(err error) bool {
+	if _, ok := err.(BoltError); !ok {
+		return false
+	}
+
+	if dbErr, ok := err.(DatabaseError); ok {
+		if dbErr.Classification() == "ClientError" {
+			return dbErr.Code() != "Neo.ClientError.Security.Unauthorized"
+		}
+
+		return false
+	}
+
+	return IsGenericError(err)
+}
+
+func IsSessionExpired(err error) bool {
+	if _, ok := err.(BoltError); !ok {
+		return false
+	}
+
+	if connErr, ok := err.(ConnectorError); ok {
+		return connErr.Code() == C.BOLT_ROUTING_NO_SERVERS_TO_SELECT
+	}
+
+	return false
+}
+
+func isPoolFullError(err error) bool {
+	if connectorError, ok := err.(ConnectorError); ok {
+		return connectorError.Code() == C.BOLT_POOL_FULL
+	}
+
+	return false
+}
+
+func newConnectionAcquisitionTimedOutError(valueSystem *boltValueSystem) error {
+	return valueSystem.connectorErrorFactory(C.BOLT_CONNECTION_STATE_DISCONNECTED, C.BOLT_POOL_ACQUISITION_TIMED_OUT, C.GoString(C.BoltError_get_string(C.BOLT_POOL_ACQUISITION_TIMED_OUT)), "", "")
+
+}
+
+func newPoolFullError(valueSystem *boltValueSystem) error {
+	return valueSystem.connectorErrorFactory(C.BOLT_CONNECTION_STATE_DISCONNECTED, C.BOLT_POOL_FULL, C.GoString(C.BoltError_get_string(C.BOLT_POOL_FULL)), "", "")
+
+}

vendor/github.com/neo4j-drivers/gobolt/lifecycle.go

+/*
+ * Copyright (c) 2002-2019 "Neo4j,"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package gobolt
+
+/*
+#include <stdlib.h>
+
+#include "bolt/bolt.h"
+*/
+import "C"
+import "sync/atomic"
+
+var initCounter int32
+
+func startupLibrary() int {
+	counter := atomic.AddInt32(&initCounter, 1)
+	if counter == 1 {
+		C.Bolt_startup()
+	}
+	return int(counter)
+}
+
+func shutdownLibrary() {
+	if atomic.AddInt32(&initCounter, -1) == 0 {
+		C.Bolt_shutdown()
+	}
+}

vendor/github.com/neo4j-drivers/gobolt/seabolt-static.go

+// +build seabolt_static
+
+/*
+ * Copyright (c) 2002-2019 "Neo4j,"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package gobolt
+
+// #cgo pkg-config: seabolt17-static
+import "C"

vendor/github.com/neo4j-drivers/gobolt/seabolt.go

+// +build !seabolt_static
+
+/*
+ * Copyright (c) 2002-2019 "Neo4j,"
+ * Neo4j Sweden AB [http://neo4j.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package gobolt
+
+// #cgo pkg-config: seabolt17
+import "C"