public void TestAddSensor_ReturnSensorObject() { // Arrange var sensor = fixture.Create <Sensor>(); sensorService.Setup(ss => ss.AddSensor(sensor)).Returns(sensor); // Act var result = sensorsController.PostSensors(sensor); // Assert Assert.NotNull(result); OkObjectResult okObjResult = Assert.IsType <OkObjectResult>(result); Assert.Equal(200, okObjResult.StatusCode); Assert.NotNull(okObjResult.Value); Assert.IsType <Sensor>(okObjResult.Value); }