public async Task InvokeAsync_TaskFaultsAndFallbackSucceeds_ReturnsFallbackResult()
{
var command = new FaultingTaskWithSuccessfulFallbackCommand();
var result = await command.InvokeAsync();
Assert.NotNull(result);
}
public async Task InvokeAsync_TaskFaultsAndFallbackSucceeds()
{
var mockStats = new Mock <IStats>();
var command = new FaultingTaskWithSuccessfulFallbackCommand
{
Stats = mockStats.Object,
};
await command.InvokeAsync();
mockStats.Verify(m => m.Elapsed("mjolnir command test.FaultingTaskWithSuccessfulFallback fallback", "Success", It.IsAny <TimeSpan>()), Times.Once);
}
public async Task InvokeAsync_WhenFallbackSemaphoreAvailable_InvokesFallbackAndReleasesSemaphore()
{
var mockSemaphore = new Mock <IIsolationSemaphore>();
mockSemaphore.Setup(m => m.TryEnter()).Returns(true);
var command = new FaultingTaskWithSuccessfulFallbackCommand
{
FallbackSemaphore = mockSemaphore.Object,
};
await command.InvokeAsync(); // Shouldn't throw instigator exception.
mockSemaphore.Verify(m => m.Release(), Times.Once);
}
public async Task InvokeAsync_WhenFallbackSemaphoreNotAvailable_RethrowsInstigatorImmediatelyWithRejectedFallbackStatus()
{
var mockSemaphore = new Mock <IIsolationSemaphore>();
mockSemaphore.Setup(m => m.TryEnter()).Returns(false);
var command = new FaultingTaskWithSuccessfulFallbackCommand
{
FallbackSemaphore = mockSemaphore.Object,
};
try
{
await command.InvokeAsync();
}
catch (CommandFailedException e)
{
mockSemaphore.Verify(m => m.TryEnter(), Times.Once);
Assert.Equal(FallbackStatus.Rejected, e.FallbackStatus);
return;
}
AssertX.FailExpectedException();
}
public async Task InvokeAsync_TaskFaultsAndFallbackSucceeds()
{
var mockStats = new Mock<IStats>();
var command = new FaultingTaskWithSuccessfulFallbackCommand
{
Stats = mockStats.Object,
};
await command.InvokeAsync();
mockStats.Verify(m => m.Elapsed("mjolnir command test.FaultingTaskWithSuccessfulFallback fallback", "Success", It.IsAny<TimeSpan>()), Times.Once);
}
public async Task InvokeAsync_WhenFallbackSemaphoreNotAvailable_RethrowsInstigatorImmediatelyWithRejectedFallbackStatus()
{
var mockSemaphore = new Mock<IIsolationSemaphore>();
mockSemaphore.Setup(m => m.TryEnter()).Returns(false);
var command = new FaultingTaskWithSuccessfulFallbackCommand
{
FallbackSemaphore = mockSemaphore.Object,
};
try
{
await command.InvokeAsync();
}
catch (CommandFailedException e)
{
mockSemaphore.Verify(m => m.TryEnter(), Times.Once);
Assert.Equal(FallbackStatus.Rejected, e.FallbackStatus);
return;
}
AssertX.FailExpectedException();
}
public async Task InvokeAsync_WhenFallbackSemaphoreAvailable_InvokesFallbackAndReleasesSemaphore()
{
var mockSemaphore = new Mock<IIsolationSemaphore>();
mockSemaphore.Setup(m => m.TryEnter()).Returns(true);
var command = new FaultingTaskWithSuccessfulFallbackCommand
{
FallbackSemaphore = mockSemaphore.Object,
};
await command.InvokeAsync(); // Shouldn't throw instigator exception.
mockSemaphore.Verify(m => m.Release(), Times.Once);
}
public async Task InvokeAsync_TaskFaultsAndFallbackSucceeds_ReturnsFallbackResult()
{
var command = new FaultingTaskWithSuccessfulFallbackCommand();
var result = await command.InvokeAsync();
Assert.NotNull(result);
}