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提交 308dbf32 编写于 作者: I iignatyev
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8038186: [TESTBUG] improvements of test j.l.i.MethodHandles 

Reviewed-by: iveresov, twisti, vlivanov
上级 0f6f7e79
隐藏空白更改
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Showing with 846 addition and 102 deletion
test/java/lang/invoke/MethodHandles/CatchExceptionTest.java 0 → 100644
浏览文件 @ 308dbf32
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package test.java.lang.invoke.MethodHandles;
import com.oracle.testlibrary.jsr292.Helper;
import jdk.testlibrary.Asserts;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.reflect.Array;
import java.util.*;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.function.Supplier;
/* @test
* @library /lib/testlibrary/jsr292 /lib/testlibrary/
* @compile CatchExceptionTest.java
* @run main/othervm -esa test.java.lang.invoke.MethodHandles.CatchExceptionTest
*/
public class CatchExceptionTest {
private static final List<Class<?>> ARGS_CLASSES;
protected static final int MAX_ARITY = Helper.MAX_ARITY - 1;
static {
Class<?> classes[] = {
Object.class,
long.class,
int.class,
byte.class,
Integer[].class,
double[].class,
String.class,
};
List<Class<?>> list = new ArrayList<>(MAX_ARITY);
for (int i = 0; i < MAX_ARITY; ++i) {
list.add(classes[Helper.RNG.nextInt(classes.length)]);
}
ARGS_CLASSES = Collections.unmodifiableList(list);
}
private final TestCase testCase;
private final int nargs;
private final int argsCount;
private final MethodHandle catcher;
private int dropped;
private MethodHandle thrower;
public CatchExceptionTest(TestCase testCase, final boolean isVararg, final int argsCount,
final int catchDrops) {
this.testCase = testCase;
this.dropped = catchDrops;
if (Helper.IS_VERBOSE) {
System.out.printf("CatchException::CatchException(%s, isVararg=%b " +
"argsCount=%d catchDrops=%d)%n",
testCase, isVararg, argsCount, catchDrops
);
}
MethodHandle thrower = testCase.thrower;
int throwerLen = thrower.type().parameterCount();
List<Class<?>> classes;
int extra = Math.max(0, argsCount - throwerLen);
classes = getThrowerParams(isVararg, extra);
this.argsCount = throwerLen + classes.size();
thrower = Helper.addTrailingArgs(thrower, this.argsCount, classes);
if (isVararg && argsCount > throwerLen) {
MethodType mt = thrower.type();
Class<?> lastParam = mt.parameterType(mt.parameterCount() - 1);
thrower = thrower.asVarargsCollector(lastParam);
}
this.thrower = thrower;
this.dropped = Math.min(this.argsCount, catchDrops);
catcher = testCase.getCatcher(getCatcherParams());
nargs = Math.max(2, this.argsCount);
}
public static void main(String[] args) throws Throwable {
for (CatchExceptionTest test : TestFactory.MANDATORY_TEST_CASES) {
test.runTest();
}
TestFactory factory = new TestFactory();
CatchExceptionTest test;
while ((test = factory.nextTest()) != null ) {
test.runTest();
}
}
private List<Class<?>> getThrowerParams(boolean isVararg, int argsCount) {
boolean unmodifiable = true;
List<Class<?>> classes;
classes = ARGS_CLASSES.subList(0,
Math.min(argsCount, (MAX_ARITY / 2) - 1));
int extra = 0;
if (argsCount >= MAX_ARITY / 2) {
classes = new ArrayList<>(classes);
unmodifiable = false;
extra = (int) classes.stream().filter(Helper::isDoubleCost).count();
int i = classes.size();
while (classes.size() + extra < argsCount) {
Class<?> aClass = ARGS_CLASSES.get(i);
if (Helper.isDoubleCost(aClass)) {
++extra;
if (classes.size() + extra >= argsCount) {
break;
}
}
classes.add(aClass);
}
}
if (isVararg && classes.size() > 0) {
if (unmodifiable) {
classes = new ArrayList<>(classes);
}
int last = classes.size() - 1;
Class<?> aClass = classes.get(classes.size() - 1);
aClass = Array.newInstance(aClass, 2).getClass();
classes.set(last, aClass);
}
return classes;
}
private List<Class<?>> getCatcherParams() {
int catchArgc = 1 + this.argsCount - dropped;
List<Class<?>> result = new ArrayList<>(
thrower.type().parameterList().subList(0, catchArgc - 1));
// prepend throwable
result.add(0, testCase.throwableClass);
return result;
}
private void runTest() {
Helper.clear();
Object[] args = Helper.randomArgs(
argsCount, thrower.type().parameterArray());
Object arg0 = Helper.MISSING_ARG;
Object arg1 = testCase.thrown;
if (argsCount > 0) {
arg0 = args[0];
}
if (argsCount > 1) {
args[1] = arg1;
}
Asserts.assertEQ(nargs, thrower.type().parameterCount());
if (argsCount < nargs) {
Object[] appendArgs = {arg0, arg1};
appendArgs = Arrays.copyOfRange(appendArgs, argsCount, nargs);
thrower = MethodHandles.insertArguments(
thrower, argsCount, appendArgs);
}
Asserts.assertEQ(argsCount, thrower.type().parameterCount());
MethodHandle target = MethodHandles.catchException(
testCase.filter(thrower), testCase.throwableClass,
testCase.filter(catcher));
Asserts.assertEQ(thrower.type(), target.type());
Asserts.assertEQ(argsCount, target.type().parameterCount());
Object returned;
try {
returned = target.invokeWithArguments(args);
} catch (Throwable ex) {
testCase.assertCatch(ex);
returned = ex;
}
testCase.assertReturn(returned, arg0, arg1, dropped, args);
}
}
class TestFactory {
public static final List<CatchExceptionTest> MANDATORY_TEST_CASES = new ArrayList<>();
private static final int MIN_TESTED_ARITY = 10;
static {
for (int[] args : new int[][]{
{0, 0},
{MIN_TESTED_ARITY, 0},
{MIN_TESTED_ARITY, MIN_TESTED_ARITY},
{CatchExceptionTest.MAX_ARITY, 0},
{CatchExceptionTest.MAX_ARITY, CatchExceptionTest.MAX_ARITY},
}) {
MANDATORY_TEST_CASES.addAll(createTests(args[0], args[1]));
}
}
private int count;
private int args;
private int dropArgs;
private int currentMaxDrops;
private int maxArgs;
private int maxDrops;
private int constructor;
private int constructorSize;
private boolean isVararg;
public TestFactory() {
if (Helper.IS_THOROUGH) {
maxArgs = maxDrops = CatchExceptionTest.MAX_ARITY;
} else {
maxArgs = MIN_TESTED_ARITY
+ Helper.RNG.nextInt(CatchExceptionTest.MAX_ARITY
- MIN_TESTED_ARITY)
+ 1;
maxDrops = MIN_TESTED_ARITY
+ Helper.RNG.nextInt(maxArgs - MIN_TESTED_ARITY)
+ 1;
args = 1;
}
if (Helper.IS_VERBOSE) {
System.out.printf("maxArgs = %d%nmaxDrops = %d%n",
maxArgs, maxDrops);
}
constructorSize = TestCase.CONSTRUCTORS.size();
}
private static List<CatchExceptionTest> createTests(int argsCount,
int catchDrops) {
if (catchDrops > argsCount || argsCount < 0 || catchDrops < 0) {
throw new IllegalArgumentException("argsCount = " + argsCount
+ ", catchDrops = " + catchDrops
);
}
List<CatchExceptionTest> result = new ArrayList<>(
TestCase.CONSTRUCTORS.size());
for (Supplier<TestCase> constructor : TestCase.CONSTRUCTORS) {
result.add(new CatchExceptionTest(constructor.get(),
/* isVararg = */ true,
argsCount,
catchDrops));
result.add(new CatchExceptionTest(constructor.get(),
/* isVararg = */ false,
argsCount,
catchDrops));
}
return result;
}
/**
* @return next test from test matrix:
* {varArgs, noVarArgs} x TestCase.rtypes x TestCase.THROWABLES x {1, .., maxArgs } x {1, .., maxDrops}
*/
public CatchExceptionTest nextTest() {
if (constructor < constructorSize) {
return createTest();
}
constructor = 0;
count++;
if (!Helper.IS_THOROUGH && count > Helper.TEST_LIMIT) {
System.out.println("test limit is exceeded");
return null;
}
if (dropArgs <= currentMaxDrops) {
if (dropArgs == 1) {
if (Helper.IS_THOROUGH || Helper.RNG.nextBoolean()) {
++dropArgs;
return createTest();
} else if (Helper.IS_VERBOSE) {
System.out.printf(
"argsCount=%d : \"drop\" scenarios are skipped%n",
args);
}
} else {
++dropArgs;
return createTest();
}
}
if (args <= maxArgs) {
dropArgs = 1;
currentMaxDrops = Math.min(args, maxDrops);
++args;
return createTest();
}
return null;
}
private CatchExceptionTest createTest() {
if (!Helper.IS_THOROUGH) {
return new CatchExceptionTest(
TestCase.CONSTRUCTORS.get(constructor++).get(),
Helper.RNG.nextBoolean(), args, dropArgs);
} else {
if (isVararg) {
isVararg = false;
return new CatchExceptionTest(
TestCase.CONSTRUCTORS.get(constructor++).get(),
isVararg, args, dropArgs);
} else {
isVararg = true;
return new CatchExceptionTest(
TestCase.CONSTRUCTORS.get(constructor).get(),
isVararg, args, dropArgs);
}
}
}
}
class TestCase<T> {
private static enum ThrowMode {
NOTHING,
CAUGHT,
UNCAUGHT,
ADAPTER
}
@SuppressWarnings("unchecked")
public static final List<Supplier<TestCase>> CONSTRUCTORS;
private static final MethodHandle FAKE_IDENTITY;
private static final MethodHandle THROW_OR_RETURN;
private static final MethodHandle CATCHER;
static {
try {
MethodHandles.Lookup lookup = MethodHandles.lookup();
THROW_OR_RETURN = lookup.findStatic(
TestCase.class,
"throwOrReturn",
MethodType.methodType(Object.class, Object.class,
Throwable.class)
);
CATCHER = lookup.findStatic(
TestCase.class,
"catcher",
MethodType.methodType(Object.class, Object.class));
FAKE_IDENTITY = lookup.findVirtual(
TestCase.class, "fakeIdentity",
MethodType.methodType(Object.class, Object.class));
} catch (NoSuchMethodException | IllegalAccessException e) {
throw new Error(e);
}
PartialConstructor[] constructors = {
create(Object.class, Object.class::cast),
create(String.class, Objects::toString),
create(int[].class, x -> new int[]{Objects.hashCode(x)}),
create(long.class,
x -> Objects.hashCode(x) & (-1L >>> 32)),
create(void.class, TestCase::noop)};
Throwable[] throwables = {
new ClassCastException("testing"),
new java.io.IOException("testing"),
new LinkageError("testing")};
List<Supplier<TestCase>> list = new ArrayList<>(constructors.length *
throwables.length * ThrowMode.values().length);
//noinspection unchecked
for (PartialConstructor f : constructors) {
for (ThrowMode mode : ThrowMode.values()) {
for (Throwable t : throwables) {
list.add(f.apply(mode, t));
}
}
}
CONSTRUCTORS = Collections.unmodifiableList(list);
}
public final Class<T> rtype;
public final ThrowMode throwMode;
public final Throwable thrown;
public final Class<? extends Throwable> throwableClass;
/**
* MH which takes 2 args (Object,Throwable), 1st is the return value,
* 2nd is the exception which will be thrown, if it's supposed in current
* {@link #throwMode}.
*/
public final MethodHandle thrower;
private final Function<Object, T> cast;
protected MethodHandle filter;
private int fakeIdentityCount;
private TestCase(Class<T> rtype, Function<Object, T> cast,
ThrowMode throwMode, Throwable thrown)
throws NoSuchMethodException, IllegalAccessException {
this.cast = cast;
filter = MethodHandles.lookup().findVirtual(
Function.class,
"apply",
MethodType.methodType(Object.class, Object.class))
.bindTo(cast);
this.rtype = rtype;
this.throwMode = throwMode;
this.throwableClass = thrown.getClass();
switch (throwMode) {
case NOTHING:
this.thrown = null;
break;
case ADAPTER:
case UNCAUGHT:
this.thrown = new Error("do not catch this");
break;
default:
this.thrown = thrown;
}
MethodHandle throwOrReturn = THROW_OR_RETURN;
if (throwMode == ThrowMode.ADAPTER) {
MethodHandle fakeIdentity = FAKE_IDENTITY.bindTo(this);
for (int i = 0; i < 10; ++i) {
throwOrReturn = MethodHandles.filterReturnValue(
throwOrReturn, fakeIdentity);
}
}
thrower = throwOrReturn.asType(MethodType.genericMethodType(2));
}
private static Void noop(Object x) {
return null;
}
private static <T2> PartialConstructor create(
Class<T2> rtype, Function<Object, T2> cast) {
return (t, u) -> () -> {
try {
return new TestCase<>(rtype, cast, t, u);
} catch (NoSuchMethodException | IllegalAccessException e) {
throw new Error(e);
}
};
}
private static <T extends Throwable>
Object throwOrReturn(Object normal, T exception) throws T {
if (exception != null) {
Helper.called("throwOrReturn/throw", normal, exception);
throw exception;
}
Helper.called("throwOrReturn/normal", normal, exception);
return normal;
}
private static <T extends Throwable>
Object catcher(Object o) {
Helper.called("catcher", o);
return o;
}
public MethodHandle filter(MethodHandle target) {
return MethodHandles.filterReturnValue(target, filter);
}
public MethodHandle getCatcher(List<Class<?>> classes) {
return MethodHandles.filterReturnValue(Helper.AS_LIST.asType(
MethodType.methodType(Object.class, classes)),
CATCHER
);
}
@Override
public String toString() {
return "TestCase{" +
"rtype=" + rtype +
", throwMode=" + throwMode +
", throwableClass=" + throwableClass +
'}';
}
public String callName() {
return "throwOrReturn/" +
(throwMode == ThrowMode.NOTHING
? "normal"
: "throw");
}
public void assertReturn(Object returned, Object arg0, Object arg1,
int catchDrops, Object... args) {
int lag = 0;
if (throwMode == ThrowMode.CAUGHT) {
lag = 1;
}
Helper.assertCalled(lag, callName(), arg0, arg1);
if (throwMode == ThrowMode.NOTHING) {
assertEQ(cast.apply(arg0), returned);
} else if (throwMode == ThrowMode.CAUGHT) {
List<Object> catchArgs = new ArrayList<>(Arrays.asList(args));
// catcher receives an initial subsequence of target arguments:
catchArgs.subList(args.length - catchDrops, args.length).clear();
// catcher also receives the exception, prepended:
catchArgs.add(0, thrown);
Helper.assertCalled("catcher", catchArgs);
assertEQ(cast.apply(catchArgs), returned);
}
Asserts.assertEQ(0, fakeIdentityCount);
}
private void assertEQ(T t, Object returned) {
if (rtype.isArray()) {
Asserts.assertEQ(t.getClass(), returned.getClass());
int n = Array.getLength(t);
Asserts.assertEQ(n, Array.getLength(returned));
for (int i = 0; i < n; ++i) {
Asserts.assertEQ(Array.get(t, i), Array.get(returned, i));
}
} else {
Asserts.assertEQ(t, returned);
}
}
private Object fakeIdentity(Object x) {
System.out.println("should throw through this!");
++fakeIdentityCount;
return x;
}
public void assertCatch(Throwable ex) {
try {
Asserts.assertSame(thrown, ex,
"must get the out-of-band exception");
} catch (Throwable t) {
ex.printStackTrace();
}
}
public interface PartialConstructor
extends BiFunction<ThrowMode, Throwable, Supplier<TestCase>> {
}
}
test/java/lang/invoke/MethodHandlesTest.java
浏览文件 @ 308dbf32
......@@ -2405,108 +2405,6 @@ public class MethodHandlesTest {
}
}
@Test
public void testCatchException() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("catchException");
for (int nargs = 0; nargs < 40; nargs++) {
if (CAN_TEST_LIGHTLY && nargs > 11) break;
for (int throwMode = 0; throwMode < THROW_MODE_LIMIT; throwMode++) {
testCatchException(int.class, new ClassCastException("testing"), throwMode, nargs);
if (CAN_TEST_LIGHTLY && nargs > 3) continue;
testCatchException(void.class, new java.io.IOException("testing"), throwMode, nargs);
testCatchException(String.class, new LinkageError("testing"), throwMode, nargs);
}
}
}
static final int THROW_NOTHING = 0, THROW_CAUGHT = 1, THROW_UNCAUGHT = 2, THROW_THROUGH_ADAPTER = 3, THROW_MODE_LIMIT = 4;
void testCatchException(Class<?> returnType, Throwable thrown, int throwMode, int nargs) throws Throwable {
testCatchException(returnType, thrown, throwMode, nargs, 0);
if (nargs <= 5 || nargs % 10 == 3) {
for (int catchDrops = 1; catchDrops <= nargs; catchDrops++)
testCatchException(returnType, thrown, throwMode, nargs, catchDrops);
}
}
private static <T extends Throwable>
Object throwOrReturn(Object normal, T exception) throws T {
if (exception != null) {
called("throwOrReturn/throw", normal, exception);
throw exception;
}
called("throwOrReturn/normal", normal, exception);
return normal;
}
private int fakeIdentityCount;
private Object fakeIdentity(Object x) {
System.out.println("should throw through this!");
fakeIdentityCount++;
return x;
}
void testCatchException(Class<?> returnType, Throwable thrown, int throwMode, int nargs, int catchDrops) throws Throwable {
countTest();
if (verbosity >= 3)
System.out.println("catchException rt="+returnType+" throw="+throwMode+" nargs="+nargs+" drops="+catchDrops);
Class<? extends Throwable> exType = thrown.getClass();
if (throwMode > THROW_CAUGHT) thrown = new UnsupportedOperationException("do not catch this");
MethodHandle throwOrReturn
= PRIVATE.findStatic(MethodHandlesTest.class, "throwOrReturn",
MethodType.methodType(Object.class, Object.class, Throwable.class));
if (throwMode == THROW_THROUGH_ADAPTER) {
MethodHandle fakeIdentity
= PRIVATE.findVirtual(MethodHandlesTest.class, "fakeIdentity",
MethodType.methodType(Object.class, Object.class)).bindTo(this);
for (int i = 0; i < 10; i++)
throwOrReturn = MethodHandles.filterReturnValue(throwOrReturn, fakeIdentity);
}
int nargs1 = Math.max(2, nargs);
MethodHandle thrower = throwOrReturn.asType(MethodType.genericMethodType(2));
thrower = addTrailingArgs(thrower, nargs, Object.class);
int catchArgc = 1 + nargs - catchDrops;
MethodHandle catcher = varargsList(catchArgc).asType(MethodType.genericMethodType(catchArgc));
Object[] args = randomArgs(nargs, Object.class);
Object arg0 = MISSING_ARG;
Object arg1 = (throwMode == THROW_NOTHING) ? (Throwable) null : thrown;
if (nargs > 0) arg0 = args[0];
if (nargs > 1) args[1] = arg1;
assertEquals(nargs1, thrower.type().parameterCount());
if (nargs < nargs1) {
Object[] appendArgs = { arg0, arg1 };
appendArgs = Arrays.copyOfRange(appendArgs, nargs, nargs1);
thrower = MethodHandles.insertArguments(thrower, nargs, appendArgs);
}
assertEquals(nargs, thrower.type().parameterCount());
MethodHandle target = MethodHandles.catchException(thrower, exType, catcher);
assertEquals(thrower.type(), target.type());
assertEquals(nargs, target.type().parameterCount());
//System.out.println("catching with "+target+" : "+throwOrReturn);
Object returned;
try {
returned = target.invokeWithArguments(args);
} catch (Throwable ex) {
assertSame("must get the out-of-band exception", thrown, ex);
if (throwMode <= THROW_CAUGHT)
assertEquals(THROW_UNCAUGHT, throwMode);
returned = ex;
}
assertCalled("throwOrReturn/"+(throwMode == THROW_NOTHING ? "normal" : "throw"), arg0, arg1);
//System.out.println("return from "+target+" : "+returned);
if (throwMode == THROW_NOTHING) {
assertSame(arg0, returned);
} else if (throwMode == THROW_CAUGHT) {
List<Object> catchArgs = new ArrayList<>(Arrays.asList(args));
// catcher receives an initial subsequence of target arguments:
catchArgs.subList(nargs - catchDrops, nargs).clear();
// catcher also receives the exception, prepended:
catchArgs.add(0, thrown);
assertEquals(catchArgs, returned);
}
assertEquals(0, fakeIdentityCount);
}
@Test
public void testThrowException() throws Throwable {
if (CAN_SKIP_WORKING) return;
......
test/lib/testlibrary/jdk/testlibrary/Asserts.java
浏览文件 @ 308dbf32
......@@ -170,6 +170,34 @@ public class Asserts {
}
}
/**
* Calls {@link #assertSame(java.lang.Object, java.lang.Object, java.lang.String)} with a default message.
*
* @param lhs The left hand side of the comparison.
* @param rhs The right hand side of the comparison.
* @see #assertSame(Object, Object, String)
*/
public static void assertSame(Object lhs, Object rhs) {
assertSame(lhs, rhs, null);
}
/**
* Asserts that {@code lhs} is the same as {@code rhs}.
*
* @param lhs The left hand side of the comparison.
* @param rhs The right hand side of the comparison.
* @param msg A description of the assumption; {@code null} for a default message.
* @throws RuntimeException if the assertion is not true.
*/
public static void assertSame(Object lhs, Object rhs, String msg) {
if (lhs != rhs) {
msg = Objects.toString(msg, "assertSame")
+ ": expected " + Objects.toString(lhs)
+ " to equal " + Objects.toString(rhs);
fail(msg);
}
}
/**
* Shorthand for {@link #assertGreaterThanOrEqual(T, T)}.
*
......
test/lib/testlibrary/jsr292/com/oracle/testlibrary/jsr292/Helper.java 0 → 100644
浏览文件 @ 308dbf32
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.oracle.testlibrary.jsr292;
import jdk.testlibrary.Asserts;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.reflect.Array;
import java.util.*;
public class Helper {
/** Flag for verbose output, true if {@code -Dverbose} specified */
public static final boolean IS_VERBOSE
= System.getProperty("verbose") != null;
/**
* Flag for thorough testing -- all test will be executed,
* true if {@code -Dthorough} specified. */
public static final boolean IS_THOROUGH
= System.getProperty("thorough") != null;
/** Random number generator w/ initial seed equal to {@code -Dseed} */
public static final Random RNG;
static {
String str = System.getProperty("seed");
long seed = str != null ? Long.parseLong(str) : new Random().nextLong();
RNG = new Random(seed);
System.out.printf("-Dseed=%d%n", seed);
}
public static final long TEST_LIMIT;
static {
String str = System.getProperty("testLimit");
TEST_LIMIT = str != null ? Long.parseUnsignedLong(str) : 2_000L;
System.out.printf("-DtestLimit=%d%n", TEST_LIMIT);
}
public static final int MAX_ARITY = 254;
public static final String MISSING_ARG = "missingArg";
public static final String MISSING_ARG_2 = "missingArg#2";
private static final int
// first int value
ONE_MILLION = (1000 * 1000),
// scale factor to reach upper 32 bits
TEN_BILLION = (10 * 1000 * 1000 * 1000),
// <<1 makes space for sign bit;
INITIAL_ARG_VAL = ONE_MILLION << 1;
public static final MethodHandle AS_LIST;
static {
try {
AS_LIST = MethodHandles.lookup().findStatic(
Arrays.class, "asList",
MethodType.methodType(List.class, Object[].class));
} catch (NoSuchMethodException | IllegalAccessException ex) {
throw new Error(ex);
}
}
public static boolean isDoubleCost(Class<?> aClass) {
return aClass == double.class || aClass == long.class;
}
private static List<List<Object>> calledLog = new ArrayList<>();
private static long nextArgVal;
public static void assertCalled(String name, Object... args) {
assertCalled(0, name, args);
}
public static void assertCalled(int lag, String name, Object... args) {
Object expected = logEntry(name, args);
Object actual = getCalled(lag);
Asserts.assertEQ(expected, actual, "method call w/ lag = " + lag);
}
public static Object called(String name, Object... args) {
List<Object> entry = logEntry(name, args);
calledLog.add(entry);
return entry;
}
private static List<Object> logEntry(String name, Object... args) {
return Arrays.asList(name, Arrays.asList(args));
}
public static void clear() {
calledLog.clear();
}
public static List<Object> getCalled(int lag) {
int size = calledLog.size();
return size <= lag ? null : calledLog.get(size - lag - 1);
}
public static MethodHandle addTrailingArgs(MethodHandle target, int nargs,
List<Class<?>> classes) {
int targetLen = target.type().parameterCount();
int extra = (nargs - targetLen);
if (extra <= 0) {
return target;
}
List<Class<?>> fakeArgs = new ArrayList<>(extra);
for (int i = 0; i < extra; ++i) {
fakeArgs.add(classes.get(i % classes.size()));
}
return MethodHandles.dropArguments(target, targetLen, fakeArgs);
}
public static MethodHandle varargsList(int arity) {
return AS_LIST.asCollector(Object[].class, arity);
}
private static long nextArg(boolean moreBits) {
long val = nextArgVal++;
long sign = -(val & 1); // alternate signs
val >>= 1;
if (moreBits)
// Guarantee some bits in the high word.
// In any case keep the decimal representation simple-looking,
// with lots of zeroes, so as not to make the printed decimal
// strings unnecessarily noisy.
{
val += (val % ONE_MILLION) * TEN_BILLION;
}
return val ^ sign;
}
private static int nextArg() {
// Produce a 32-bit result something like ONE_MILLION+(smallint).
// Example: 1_000_042.
return (int) nextArg(false);
}
private static long nextArg(Class<?> kind) {
if (kind == long.class || kind == Long.class ||
kind == double.class || kind == Double.class)
// produce a 64-bit result something like
// ((TEN_BILLION+1) * (ONE_MILLION+(smallint)))
// Example: 10_000_420_001_000_042.
{
return nextArg(true);
}
return (long) nextArg();
}
private static Object randomArg(Class<?> param) {
Object wrap = castToWrapperOrNull(nextArg(param), param);
if (wrap != null) {
return wrap;
}
if (param.isInterface()) {
for (Class<?> c : param.getClasses()) {
if (param.isAssignableFrom(c) && !c.isInterface()) {
param = c;
break;
}
}
}
if (param.isArray()) {
Class<?> ctype = param.getComponentType();
Object arg = Array.newInstance(ctype, 2);
Array.set(arg, 0, randomArg(ctype));
return arg;
}
if (param.isInterface() && param.isAssignableFrom(List.class)) {
return Arrays.asList("#" + nextArg());
}
if (param.isInterface() || param.isAssignableFrom(String.class)) {
return "#" + nextArg();
}
try {
return param.newInstance();
} catch (InstantiationException | IllegalAccessException ex) {
}
return null; // random class not Object, String, Integer, etc.
}
public static Object[] randomArgs(Class<?>... params) {
Object[] args = new Object[params.length];
for (int i = 0; i < args.length; i++) {
args[i] = randomArg(params[i]);
}
return args;
}
public static Object[] randomArgs(int nargs, Class<?> param) {
Object[] args = new Object[nargs];
for (int i = 0; i < args.length; i++) {
args[i] = randomArg(param);
}
return args;
}
public static Object[] randomArgs(int nargs, Class<?>... params) {
Object[] args = new Object[nargs];
for (int i = 0; i < args.length; i++) {
Class<?> param = params[i % params.length];
args[i] = randomArg(param);
}
return args;
}
public static Object[] randomArgs(List<Class<?>> params) {
return randomArgs(params.toArray(new Class<?>[params.size()]));
}
private static Object castToWrapper(Object value, Class<?> dst) {
Object wrap = null;
if (value instanceof Number) {
wrap = castToWrapperOrNull(((Number) value).longValue(), dst);
}
if (value instanceof Character) {
wrap = castToWrapperOrNull((char) (Character) value, dst);
}
if (wrap != null) {
return wrap;
}
return dst.cast(value);
}
@SuppressWarnings("cast")
// primitive cast to (long) is part of the pattern
private static Object castToWrapperOrNull(long value, Class<?> dst) {
if (dst == int.class || dst == Integer.class) {
return (int) (value);
}
if (dst == long.class || dst == Long.class) {
return (long) (value);
}
if (dst == char.class || dst == Character.class) {
return (char) (value);
}
if (dst == short.class || dst == Short.class) {
return (short) (value);
}
if (dst == float.class || dst == Float.class) {
return (float) (value);
}
if (dst == double.class || dst == Double.class) {
return (double) (value);
}
if (dst == byte.class || dst == Byte.class) {
return (byte) (value);
}
if (dst == boolean.class || dst == boolean.class) {
return ((value % 29) & 1) == 0;
}
return null;
}
}
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