public async Task WhenHandlingAnything_ThenThrowsWellKnownException() { var handler = new ThrowsExceptionHandler(); var body = new byte[] { }; var headers = new Dictionary <string, string>(); var context = new ProcessingContext("", "", ""); await AssertExt.ThrowsAsync <JustForTestingException>( () => handler.ExecuteAsync(context, body, headers) ); }