public void Halt_SendValidRequest() { //Arrange string commandName = "halt"; IRestRequest sentRequest = null; var commandSenderMock = new Mock <ICommandSender>(); commandSenderMock .Setup(x => x.ExecuteRequest <CommandResponse>(It.IsAny <string>(), It.IsAny <RestRequest>())) .Callback((string baseUrl, IRestRequest request) => sentRequest = request) .Returns(new CommandResponse()); var rotator = new Rotator(_deviceConfiguration, commandSenderMock.Object); //Act rotator.Halt(); //Assert Assert.Equal(Method.PUT, sentRequest.Method); AssertCommonParameters(sentRequest.Parameters, _deviceConfiguration, commandName); }