public void GetCitiesReturnsListOfCities()
{
//Arrange
var moq = new Mock <IRegionsRepository>();
moq.Setup(m => m.GetCities(It.IsAny <int>())).Returns(Task.FromResult(new List <City>() as IEnumerable <City>));
RegionsController controller = new RegionsController(moq.Object);
//Act
var result = controller.GetCities(3).Result;
//Arrange
Assert.IsInstanceOfType(result, typeof(IEnumerable <City>));
}