public async Task StopAsyncWithoutStartAsyncNoops()
{
var tcs = new TaskCompletionSource <object>();
var service = new MyBackgroundService(tcs.Task);
await service.StopAsync(CancellationToken.None);
}
public async Task StartReturnsLongRunningTaskIfFailed()
{
var tcs = new TaskCompletionSource <object>();
tcs.TrySetException(new Exception("fail!"));
var service = new MyBackgroundService(tcs.Task);
var exception = await Assert.ThrowsAsync <Exception>(() => service.StartAsync(CancellationToken.None));
Assert.Equal("fail!", exception.Message);
}
public void StartReturnsCompletedTaskIfCancelled()
{
var tcs = new TaskCompletionSource <object>();
tcs.TrySetCanceled();
var service = new MyBackgroundService(tcs.Task);
var task = service.StartAsync(CancellationToken.None);
Assert.True(task.IsCompleted);
}
public async Task StopAsyncStopsBackgroundService()
{
var tcs = new TaskCompletionSource <object>();
var service = new MyBackgroundService(tcs.Task);
await service.StartAsync(CancellationToken.None);
Assert.False(service.ExecuteTask.IsCompleted);
await service.StopAsync(CancellationToken.None);
Assert.True(service.ExecuteTask.IsCompleted);
}
public void StartReturnsCompletedTaskIfLongRunningTaskIsIncomplete()
{
var tcs = new TaskCompletionSource <object>();
var service = new MyBackgroundService(tcs.Task);
var task = service.StartAsync(CancellationToken.None);
Assert.True(task.IsCompleted);
Assert.False(tcs.Task.IsCompleted);
// Complete the task
tcs.TrySetResult(null);
}
public MyClass(IHostedServiceAccessor <MyBackgroundService> accessor)
{
_service = accessor.Service ?? throw new ArgumentNullException(nameof(accessor));
}