public async Task ShortenUrl_Success() { DeleteDatabase(); using (var _dbContext = dbContext) { var TestData = GetTestData(); foreach (var Data in TestData) { _dbContext.Urls.Add(Data); } _dbContext.SaveChanges(); _service = new ShortenerService(_dbContext, _config, _clientFactory, _helper); var input = GetShortenUrlInput(); _helper.Encode(Arg.Any <int>()).Returns("hfRd"); _helper.GetTitle(Arg.Any <string>()).Returns("Gmail"); var resp = await _service.ShortenURL(input); Assert.IsNotNull(resp); Assert.IsNull(resp.Message); Assert.IsNotNull(resp.Url); Assert.AreEqual(resp.Url.OrignalUrl, input.Url); } }