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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
using
System
;
using
System
.
Collections
.
Generic
;
using
System
.
Runtime
;
using
System
.
Threading
;
using
Microsoft
.
ClearScript
.
V8
;
using
Microsoft
.
VisualStudio
.
TestTools
.
UnitTesting
;
using
System
.
Threading
.
Tasks
;
namespace
Microsoft
.
ClearScript
.
Test
{
// ReSharper disable once PartialTypeWithSinglePart
public
partial
class
V8ScriptEngineTest
{
#region test methods
// ReSharper disable InconsistentNaming
[
TestMethod
,
TestCategory
(
"V8ScriptEngine"
)
]
public
void
V8ScriptEngine_ValueTaskPromiseConversion
(
)
{
engine
.
Script
.
value
=
new
ValueTask
<
string
>
(
"foo"
)
;
Assert
.
AreEqual
(
"HostObject"
,
engine
.
Evaluate
(
"value.constructor.name"
)
)
;
Assert
.
IsInstanceOfType
(
engine
.
Evaluate
(
"Promise.resolve(123)"
)
,
typeof
(
ScriptObject
)
)
;
engine
.
Dispose
(
)
;
engine
=
new
V8ScriptEngine
(
V8ScriptEngineFlags
.
EnableDebugging
|
V8ScriptEngineFlags
.
EnableTaskPromiseConversion
|
V8ScriptEngineFlags
.
EnableValueTaskPromiseConversion
)
;
engine
.
Script
.
value
=
new
ValueTask
<
string
>
(
"bar"
)
;
Assert
.
AreEqual
(
"Promise"
,
engine
.
Evaluate
(
"value.constructor.name"
)
)
;
Assert
.
IsInstanceOfType
(
engine
.
Evaluate
(
"Promise.resolve(123)"
)
,
typeof
(
Task
)
)
;
var
task
=
new
Func
<
Task
<
object
>
>
(
async
(
)
=>
await
(
Task
<
object
>
)
engine
.
Evaluate
(
"Promise.resolve(123)"
)
)
(
)
;
Assert
.
AreEqual
(
123
,
task
.
Result
)
;
engine
.
Script
.
promise
=
new
ValueTask
<
int
>
(
456
)
;
engine
.
Execute
(
"promise.then(value => result = value);"
)
;
Assert
.
AreEqual
(
456
,
engine
.
Script
.
result
)
;
var
cancelSource
=
new
CancellationTokenSource
(
)
;
cancelSource
.
Cancel
(
)
;
engine
.
Script
.
promise
=
new
ValueTask
<
string
>
(
Task
<
string
>
.
Factory
.
StartNew
(
(
)
=>
"baz"
,
cancelSource
.
Token
)
)
;
Thread
.
Sleep
(
250
)
;
engine
.
Execute
(
"promise.then(value => result = value, value => error = value);"
)
;
Assert
.
IsInstanceOfType
(
engine
.
Script
.
error
.
hostException
.
GetBaseException
(
)
,
typeof
(
TaskCanceledException
)
)
;
cancelSource
=
new
CancellationTokenSource
(
)
;
engine
.
Script
.
promise
=
new
ValueTask
<
double
>
(
Task
<
double
>
.
Factory
.
StartNew
(
(
)
=>
throw
new
AmbiguousImplementationException
(
)
,
cancelSource
.
Token
)
)
;
Thread
.
Sleep
(
250
)
;
engine
.
Execute
(
"promise.then(value => result = value, value => error = value);"
)
;
Assert
.
IsInstanceOfType
(
engine
.
Script
.
error
.
hostException
.
GetBaseException
(
)
,
typeof
(
AmbiguousImplementationException
)
)
;
}
[
TestMethod
,
TestCategory
(
"V8ScriptEngine"
)
]
public
void
V8ScriptEngine_ValueTaskPromiseConversion_NoResult
(
)
{
engine
.
Script
.
value
=
new
ValueTask
(
Task
.
CompletedTask
)
;
Assert
.
AreEqual
(
"HostObject"
,
engine
.
Evaluate
(
"value.constructor.name"
)
)
;
Assert
.
IsInstanceOfType
(
engine
.
Evaluate
(
"Promise.resolve(123)"
)
,
typeof
(
ScriptObject
)
)
;
engine
.
Dispose
(
)
;
engine
=
new
V8ScriptEngine
(
V8ScriptEngineFlags
.
EnableDebugging
|
V8ScriptEngineFlags
.
EnableTaskPromiseConversion
|
V8ScriptEngineFlags
.
EnableValueTaskPromiseConversion
)
;
engine
.
Script
.
value
=
new
ValueTask
(
Task
.
CompletedTask
)
;
Assert
.
AreEqual
(
"Promise"
,
engine
.
Evaluate
(
"value.constructor.name"
)
)
;
Assert
.
IsInstanceOfType
(
engine
.
Evaluate
(
"Promise.resolve(123)"
)
,
typeof
(
Task
)
)
;
var
task
=
new
Func
<
Task
<
object
>
>
(
async
(
)
=>
await
(
Task
<
object
>
)
engine
.
Evaluate
(
"Promise.resolve(123)"
)
)
(
)
;
Assert
.
AreEqual
(
123
,
task
.
Result
)
;
engine
.
Script
.
promise
=
new
ValueTask
(
Task
.
CompletedTask
)
;
engine
.
Execute
(
"promise.then(value => result = value);"
)
;
Assert
.
IsInstanceOfType
(
engine
.
Script
.
result
,
typeof
(
Undefined
)
)
;
var
cancelSource
=
new
CancellationTokenSource
(
)
;
cancelSource
.
Cancel
(
)
;
engine
.
Script
.
promise
=
new
ValueTask
(
Task
.
Factory
.
StartNew
(
(
)
=>
{
}
,
cancelSource
.
Token
)
)
;
Thread
.
Sleep
(
250
)
;
engine
.
Execute
(
"promise.then(value => result = value, value => error = value);"
)
;
Assert
.
IsInstanceOfType
(
engine
.
Script
.
error
.
hostException
.
GetBaseException
(
)
,
typeof
(
TaskCanceledException
)
)
;
cancelSource
=
new
CancellationTokenSource
(
)
;
engine
.
Script
.
promise
=
new
ValueTask
(
Task
.
Factory
.
StartNew
(
(
)
=>
throw
new
AmbiguousImplementationException
(
)
,
cancelSource
.
Token
)
)
;
Thread
.
Sleep
(
250
)
;
engine
.
Execute
(
"promise.then(value => result = value, value => error = value);"
)
;
Assert
.
IsInstanceOfType
(
engine
.
Script
.
error
.
hostException
.
GetBaseException
(
)
,
typeof
(
AmbiguousImplementationException
)
)
;
}
[
TestMethod
,
TestCategory
(
"V8ScriptEngine"
)
]
public
void
V8ScriptEngine_NativeEnumerator_Disposal_AsyncSource
(
)
{
var
source
=
TestEnumerable
.
CreateAsync
(
"foo"
,
"bar"
,
"baz"
)
;
engine
.
Script
.
done
=
new
ManualResetEventSlim
(
)
;
engine
.
AddRestrictedHostObject
(
"source"
,
source
)
;
engine
.
Execute
(
@"
result = '';
(async function () {
for await (let item of source) {
result += item;
}
done.Set();
})();
"
)
;
engine
.
Script
.
done
.
Wait
(
)
;
Assert
.
AreEqual
(
"foobarbaz"
,
engine
.
Script
.
result
)
;
Assert
.
AreEqual
(
1
,
(
(
TestEnumerable
.
IDisposableEnumeratorFactory
)
source
)
.
DisposedEnumeratorCount
)
;
}
[
TestMethod
,
TestCategory
(
"V8ScriptEngine"
)
]
public
void
V8ScriptEngine_AsyncIteration_AsyncEnumerable
(
)
{
static
async
IAsyncEnumerable
<
object
>
GetItems
(
)
{
await
Task
.
Delay
(
10
)
;
yield
return
123
;
await
Task
.
Delay
(
10
)
;
yield
return
"blah"
;
}
engine
.
Script
.
done
=
new
ManualResetEventSlim
(
)
;
engine
.
Script
.
enumerable
=
GetItems
(
)
;
engine
.
Execute
(
@"
result = '';
(async function () {
for await (var item of enumerable) {
result += item;
}
done.Set();
})();
"
)
;
engine
.
Script
.
done
.
Wait
(
)
;
var
result
=
(
string
)
engine
.
Script
.
result
;
Assert
.
AreEqual
(
7
,
result
.
Length
)
;
Assert
.
IsTrue
(
result
.
IndexOf
(
"123"
,
StringComparison
.
Ordinal
)
>=
0
)
;
Assert
.
IsTrue
(
result
.
IndexOf
(
"blah"
,
StringComparison
.
Ordinal
)
>=
0
)
;
}
[
TestMethod
,
TestCategory
(
"V8ScriptEngine"
)
]
public
void
V8ScriptEngine_AsyncIteration_AsyncEnumerable_Exception
(
)
{
const
string
errorMessage
=
"Well, this is bogus!"
;
static
async
IAsyncEnumerable
<
object
>
GetItems
(
)
{
await
Task
.
Delay
(
10
)
;
yield
return
123
;
await
Task
.
Delay
(
10
)
;
yield
return
"blah"
;
throw
new
InvalidOperationException
(
errorMessage
)
;
}
engine
.
Script
.
done
=
new
ManualResetEventSlim
(
)
;
engine
.
Script
.
enumerable
=
GetItems
(
)
;
engine
.
Execute
(
@"
result = '';
(async function () {
try {
for await (var item of enumerable) {
result += item;
}
}
catch (error) {
errorMessage = error.message;
throw error;
}
finally {
done.Set();
}
})();
"
)
;
engine
.
Script
.
done
.
Wait
(
)
;
var
result
=
(
string
)
engine
.
Script
.
result
;
Assert
.
AreEqual
(
7
,
result
.
Length
)
;
Assert
.
IsTrue
(
result
.
IndexOf
(
"123"
,
StringComparison
.
Ordinal
)
>=
0
)
;
Assert
.
IsTrue
(
result
.
IndexOf
(
"blah"
,
StringComparison
.
Ordinal
)
>=
0
)
;
Assert
.
AreEqual
(
errorMessage
,
engine
.
Script
.
errorMessage
)
;
}
// ReSharper restore InconsistentNaming
#endregion
}
}
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