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