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a486f518
编写于
7月 10, 2018
作者:
J
Joao Moreno
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电子邮件补丁
差异文件
async execution order tests
related to #53773
上级
39f976c1
变更
1
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1 changed file
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+89
-0
src/vs/base/test/common/async.test.ts
src/vs/base/test/common/async.test.ts
+89
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未找到文件。
src/vs/base/test/common/async.test.ts
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a486f518
...
...
@@ -41,6 +41,95 @@ suite('Async', () => {
return
result
;
});
// Cancelling a sync cancelable promise will fire the cancelled token.
// Also, every `then` callback runs in another execution frame.
test
(
'
CancelablePromise execution order (sync)
'
,
function
()
{
const
order
=
[];
const
cancellablePromise
=
async
.
createCancelablePromise
(
token
=>
{
order
.
push
(
'
in callback
'
);
token
.
onCancellationRequested
(
_
=>
order
.
push
(
'
cancelled
'
));
return
Promise
.
resolve
(
1234
);
});
order
.
push
(
'
afterCreate
'
);
const
promise
=
cancellablePromise
.
then
(
null
,
err
=>
null
)
.
then
(()
=>
order
.
push
(
'
finally
'
));
cancellablePromise
.
cancel
();
order
.
push
(
'
afterCancel
'
);
return
promise
.
then
(()
=>
assert
.
deepEqual
(
order
,
[
'
in callback
'
,
'
afterCreate
'
,
'
cancelled
'
,
'
afterCancel
'
,
'
finally
'
]));
});
// Cancelling an async cancelable promise is just the same as a sync cancellable promise.
test
(
'
CancelablePromise execution order (async)
'
,
function
()
{
const
order
=
[];
const
cancellablePromise
=
async
.
createCancelablePromise
(
token
=>
{
order
.
push
(
'
in callback
'
);
token
.
onCancellationRequested
(
_
=>
order
.
push
(
'
cancelled
'
));
return
new
Promise
(
c
=>
setTimeout
(
c
(
1234
),
0
));
});
order
.
push
(
'
afterCreate
'
);
const
promise
=
cancellablePromise
.
then
(
null
,
err
=>
null
)
.
then
(()
=>
order
.
push
(
'
finally
'
));
cancellablePromise
.
cancel
();
order
.
push
(
'
afterCancel
'
);
return
promise
.
then
(()
=>
assert
.
deepEqual
(
order
,
[
'
in callback
'
,
'
afterCreate
'
,
'
cancelled
'
,
'
afterCancel
'
,
'
finally
'
]));
});
// Cancelling a sync tpromise will NOT cancel the promise, since it has resolved already.
// Every `then` callback runs sync in the same execution frame, thus `finally` executes
// before `afterCancel`.
test
(
'
TPromise execution order (sync)
'
,
function
()
{
const
order
=
[];
let
promise
=
new
TPromise
(
resolve
=>
{
order
.
push
(
'
in executor
'
);
resolve
(
1234
);
},
()
=>
order
.
push
(
'
cancelled
'
));
order
.
push
(
'
afterCreate
'
);
promise
=
promise
.
then
(
null
,
err
=>
null
)
.
then
(()
=>
order
.
push
(
'
finally
'
));
promise
.
cancel
();
order
.
push
(
'
afterCancel
'
);
return
promise
.
then
(()
=>
assert
.
deepEqual
(
order
,
[
'
in executor
'
,
'
afterCreate
'
,
'
finally
'
,
'
afterCancel
'
]));
});
// Cancelling an async tpromise will cancel the promise.
// Every `then` callback runs sync on the same execution frame as the `cancel` call,
// so finally still executes before `afterCancel`.
test
(
'
TPromise execution order (async)
'
,
function
()
{
const
order
=
[];
let
promise
=
new
TPromise
(
resolve
=>
{
order
.
push
(
'
in executor
'
);
setTimeout
(()
=>
resolve
(
1234
));
},
()
=>
order
.
push
(
'
cancelled
'
));
order
.
push
(
'
afterCreate
'
);
promise
=
promise
.
then
(
null
,
err
=>
null
)
.
then
(()
=>
order
.
push
(
'
finally
'
));
promise
.
cancel
();
order
.
push
(
'
afterCancel
'
);
return
promise
.
then
(()
=>
assert
.
deepEqual
(
order
,
[
'
in executor
'
,
'
afterCreate
'
,
'
cancelled
'
,
'
finally
'
,
'
afterCancel
'
]));
});
test
(
'
cancelablePromise - get inner result
'
,
async
function
()
{
let
promise
=
async
.
createCancelablePromise
(
token
=>
{
return
async
.
timeout
(
12
).
then
(
_
=>
1234
);
...
...
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