public void Should_return_ok_result_with_count_equals_to_zero_when_no_devices_exist()
{
var parameters = new DevicesParametersModel();
//Arrange
_deviceApiService.Setup(x => x.GetDevicesCount(null, null, String.Empty)).Returns(0);
//Act
var result = _devicesController.GetDevicesCount(parameters).GetAwaiter().GetResult();
//Assert
Assert.IsInstanceOf <OkObjectResult>(result);
var okObjectResult = result as OkObjectResult;
Assert.NotNull(okObjectResult);
Assert.IsInstanceOf <DevicesCountRootObject>(okObjectResult.Value);
var rootObject = okObjectResult.Value as DevicesCountRootObject;
Assert.NotNull(rootObject);
rootObject.Count.ShouldEqual(0);
}