public void CanSlave_SendValidRequest() { //Arrange string commandName = "canslave"; IRestRequest sentRequest = null; var commandSenderMock = new Mock <ICommandSender>(); commandSenderMock .Setup(x => x.ExecuteRequest <BoolResponse>(It.IsAny <string>(), It.IsAny <RestRequest>())) .Callback((string baseUrl, IRestRequest request) => sentRequest = request) .Returns(new BoolResponse(false)); var dome = new Dome(_deviceConfiguration, commandSenderMock.Object); //Act dome.CanSlave(); //Assert Assert.Equal(Method.GET, sentRequest.Method); AssertCommonParameters(sentRequest.Parameters, _deviceConfiguration, commandName); }