public async Task WhenStopCalledWithoutStartingThenShouldNoop()
{
var tcs = new TaskCompletionSource <object>();
var service = new TestProjector(tcs.Task);
await service.StopAsync(CancellationToken.None);
}
public void WhenCancelledThenStartShouldReturnCompletedTask()
{
var tcs = new TaskCompletionSource <object>();
tcs.TrySetCanceled();
var service = new TestProjector(tcs.Task);
var task = service.StartAsync(CancellationToken.None);
task.IsCompleted.Should().BeTrue();
}
public void WhenStartedThenShouldReturnCompletedTaskIfLongRunningTaskIsIncomplete()
{
var tcs = new TaskCompletionSource <object>();
var service = new TestProjector(tcs.Task);
var task = service.StartAsync(CancellationToken.None);
task.IsCompleted.Should().BeTrue();
tcs.Task.IsCompleted.Should().BeFalse();
// Complete the tcs task
tcs.TrySetResult(null);
}
public async Task WhenStopCalledThenShouldAlsoStopBackgroundService()
{
var tcs = new TaskCompletionSource <object>();
var service = new TestProjector(tcs.Task);
await service.StartAsync(CancellationToken.None);
service.ExecutingTask.IsCompleted.Should().BeFalse();
await service.StopAsync(CancellationToken.None);
service.ExecutingTask.IsCompleted.Should().BeTrue();
}
public void WhenFailedThenStartShouldReturnLongRunningTask()
{
var tcs = new TaskCompletionSource <object>();
tcs.TrySetException(new Exception("Failure!"));
var service = new TestProjector(tcs.Task);
Func <Task> act = async() => await service.StartAsync(CancellationToken.None);
act.Should().Throw <Exception>()
.And.Message.Should().Be("Failure!");
}