public async Task CreatorUserNameShouldReturnUserNameOfUserThatCreatedThatAdvertisement() { // Arrange var db = this.Context; this.PopulateData(db); var advertisementsService = new AdvertisementService(db); var advertisementId = 1; // Act var result = await advertisementsService.CreatorUserName(advertisementId); // Assert result .Should() .Be("pesho"); }