public void DescribeInstances_NoId_InstanceList() { // Arrange var target = new DescribeInstances { AccessKey = string.Empty, SecretKey = string.Empty }; // Act IDictionary<string, object> results = WorkflowInvoker.Invoke(target, new Dictionary<string, object>()); List<Reservation> reservation = results["Reservations"] as List<Reservation>; // Assert Assert.IsNotNull(reservation); }