public void AddHistoryObject_When_history_Then_added_history() { // Arrange var reducedForecastPerDay = new ReducedForecastPerDay { Time = 444, DayTemp = 1, NightTemp = 2, EveningTemp = 3, MorningTemp = 4, Rain = "rain", Pressure = 1000, Humidity = 57, WindSpeed = 12, WindDirection = 234, Clouds = 65 }; var history1 = new HistoryWeatherDataObject { Id = 1, City = "city1", CountDays = 1, RequestTime = DateTime.Now, ReducedForecastPerDay = reducedForecastPerDay }; // Act _weatherService.AddHistoryObject(history1); // Assert using (var db = new WeatherContext()) { Assert.IsNotNull(db.History.FirstOrDefault(h => h.City == history1.City)); } }