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// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Threading;
using Moq;
using Xunit;
using Assert = Microsoft.TestCommon.AssertEx;
namespace System.Web.Mvc.Async.Test
{
public class SynchronizationContextUtilTest
{
[Fact]
public void SyncWithAction()
{
// Arrange
bool actionWasCalled = false;
bool sendWasCalled = false;
Mock<SynchronizationContext> mockSyncContext = new Mock<SynchronizationContext>();
mockSyncContext
.Setup(sc => sc.Send(It.IsAny<SendOrPostCallback>(), null))
.Callback(
delegate(SendOrPostCallback d, object state)
{
sendWasCalled = true;
d(state);
});
// Act
SynchronizationContextUtil.Sync(mockSyncContext.Object, () => { actionWasCalled = true; });
// Assert
Assert.True(actionWasCalled);
Assert.True(sendWasCalled);
}
[Fact]
public void SyncWithActionCapturesException()
{
// Arrange
InvalidOperationException exception = new InvalidOperationException("Some exception text.");
Mock<SynchronizationContext> mockSyncContext = new Mock<SynchronizationContext>();
mockSyncContext
.Setup(sc => sc.Send(It.IsAny<SendOrPostCallback>(), null))
.Callback(
delegate(SendOrPostCallback d, object state)
{
try
{
d(state);
}
catch
{
// swallow exceptions, just like AspNetSynchronizationContext
}
});
// Act & assert
SynchronousOperationException thrownException = Assert.Throws<SynchronousOperationException>(
delegate { SynchronizationContextUtil.Sync(mockSyncContext.Object, () => { throw exception; }); },
@"An operation that crossed a synchronization context failed. See the inner exception for more information.");
Assert.Equal(exception, thrownException.InnerException);
}
[Fact]
public void SyncWithFunc()
{
// Arrange
bool sendWasCalled = false;
Mock<SynchronizationContext> mockSyncContext = new Mock<SynchronizationContext>();
mockSyncContext
.Setup(sc => sc.Send(It.IsAny<SendOrPostCallback>(), null))
.Callback(
delegate(SendOrPostCallback d, object state)
{
sendWasCalled = true;
d(state);
});
// Act
int retVal = SynchronizationContextUtil.Sync(mockSyncContext.Object, () => 42);
// Assert
Assert.Equal(42, retVal);
Assert.True(sendWasCalled);
}
}
}
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