public async Task SetAveragePeriodAsync_SendValidRequest() { //Arrange string commandName = "averageperiod"; string periodParameterName = "AveragePeriod"; double periodParameterValue = 2; IRestRequest sentRequest = null; var commandSenderMock = new Mock <ICommandSender>(); commandSenderMock .Setup(x => x.ExecuteRequestAsync <CommandResponse>(It.IsAny <string>(), It.IsAny <RestRequest>())) .Callback((string baseUrl, IRestRequest request) => sentRequest = request) .Returns(Task.FromResult(new CommandResponse())); var observingConditions = new ObservingConditions(_deviceConfiguration, commandSenderMock.Object); //Act await observingConditions.SetAveragePeriodAsync(periodParameterValue); //Assert Assert.Equal(Method.PUT, sentRequest.Method); AssertCommonParameters(sentRequest.Parameters, _deviceConfiguration, commandName); AssertParameter(sentRequest.Parameters, periodParameterName, periodParameterValue); }