public async Task GetAvaliableDistrictsAsync_ShouldReturnOnlyWolaAndBemowo() { _notificationSystem = new NotificationSystem(string.Empty); var expectedResult = new List <District> { new District("Bemowo"), new District("Wola") }; var results = await _notificationSystem.GetAvaliableDistrictsAsync(); results.Should().NotBeNull(); results.Should().BeEquivalentTo(expectedResult); }