public async Task ByIdShouldReturnItemWithThatId() { // Arrange //Mapper.Initialize(config => config.AddProfile<AutoMapperProfile>()); var db = this.Context; this.PopulateData(db); var advertisementsService = new AdvertisementService(db); var advertisementId = 1; // Act var result = await advertisementsService.ById(advertisementId); // Assert result .Name .Should() .Be("very good one"); result .Description .Should() .Be("need to be in that site"); result .Price .Should() .Be(300); }