public async Task AddCity_When_adding_city_Then_Save_of_UnitOfWork_called()
{
var cityRepository = A.Fake <IRepository <CityEntity> >();
var uow = A.Fake <IUnitOfWork>();
A.CallTo(() => uow.Repository <CityEntity>()).Returns(cityRepository);
var weatherService = new WeatherService(uow);
await weatherService.AddCityAsync(new CityEntity { Id = 1, Name = "name" });
A.CallTo(() => uow.Save()).MustHaveHappened(Repeated.Exactly.Once);
}
