public void Not_Process_If_Cancelled_Before_Processing_Starts()
{
// arrange
var sut = new AnalyzerTaskFactory();
var cts = new CancellationTokenSource();
var badAnalyzer = new Mock <IAnalyzer>();
badAnalyzer.Setup(analyzer => analyzer.Setup(It.IsAny <CancellationToken>()))
.Callback(() =>
{
cts.Cancel();
});
badAnalyzer.Setup(analyzer => analyzer.Process(It.IsAny <CancellationToken>())).Verifiable();
// act
bool cancelled = false;
try
{
sut.StartAnalyzers(new[] { badAnalyzer.Object }, cts.Token).Wait();
}
catch (Exception)
{
cancelled = true;
}
// assert
badAnalyzer.Verify(analyzer => analyzer.Setup(cts.Token), Times.Exactly(1));
badAnalyzer.Verify(analyzer => analyzer.Process(cts.Token), Times.Exactly(0));
}
public void Not_Do_Anything_If_Immediately_Cancelled()
{
// arrange
var sut = new AnalyzerTaskFactory();
var cts = new CancellationTokenSource();
var badAnalyzer = new Mock <IAnalyzer>();
var normalAnalyzer = new Mock <IAnalyzer>();
sut.StartTestingAction = cts.Cancel;
badAnalyzer.Setup(analyzer => analyzer.Setup(It.IsAny <CancellationToken>())).Verifiable();
badAnalyzer.Setup(analyzer => analyzer.Process(It.IsAny <CancellationToken>())).Verifiable();
// act
try
{
sut.StartAnalyzers(new[] { badAnalyzer.Object, normalAnalyzer.Object }, cts.Token).Wait();
}
catch (Exception)
{
;
}
// assert
badAnalyzer.Verify(analyzer => analyzer.Setup(cts.Token), Times.Exactly(0));
badAnalyzer.Verify(analyzer => analyzer.Process(cts.Token), Times.Exactly(0));
}
public void Not_Throw_If_Processing_Fails()
{
// arrange
var sut = new AnalyzerTaskFactory();
var badAnalyzer = new Mock <IAnalyzer>();
badAnalyzer.Setup(analyzer => analyzer.Process(CancellationToken.None)).Throws <FileNotFoundException>();
Action throws = () => sut.StartAnalyzers(new[] { badAnalyzer.Object }, CancellationToken.None);
// act
// assert
throws.Should().NotThrow();
}
public void Wait_For_All_Tasks_To_Finish()
{
// arrange
var sut = new AnalyzerTaskFactory();
var cts = new CancellationTokenSource();
var slowTime = DateTime.MinValue;
var fastTime = DateTime.MinValue;
Func <CancellationToken, Task <object> > slow = async ct =>
{
await Task.Delay(1000);
slowTime = DateTime.Now;
return(null);
};
var slowAnalyzer = new Mock <IAnalyzer>();
slowAnalyzer.Setup(analyzer => analyzer.Setup(It.IsAny <CancellationToken>())).Returns(slow);
slowAnalyzer.Setup(analyzer => analyzer.Process(It.IsAny <CancellationToken>())).Returns(slow);
Func <CancellationToken, Task <object> > fast = async ct =>
{
await Task.Delay(100);
fastTime = DateTime.Now;
return(null);
};
var fastAnalyzer = new Mock <IAnalyzer>();
fastAnalyzer.Setup(analyzer => analyzer.Setup(It.IsAny <CancellationToken>())).Returns(fast);
fastAnalyzer.Setup(analyzer => analyzer.Process(It.IsAny <CancellationToken>())).Returns(fast);
// act
sut.StartAnalyzers(new[] { slowAnalyzer.Object, fastAnalyzer.Object }, cts.Token).Wait();
// assert
slowTime.Should().NotBe(DateTime.MinValue);
fastTime.Should().NotBe(DateTime.MinValue);
(slowTime > fastTime).Should().BeTrue();
}
public async Task Return_A_Task_That_Throws_If_The_Cancellation_Token_Is_Set()
{
// arrange
var fac = new AnalyzerTaskFactory();
var analyzers = new[] { new Mock <IAnalyzer>().Object };
var cancellationTokenSource = new CancellationTokenSource();
cancellationTokenSource.Cancel(true);
// act
var task = fac.StartAnalyzers(analyzers, cancellationTokenSource.Token);
// assert
try
{
await Task.Delay(1000);
await task;
}
catch (Exception e)
{
e.Should().BeOfType <TaskCanceledException>();
}
}
