public void Add_NoExistingValues_AddsElementToTheRepository(TestType value, Guid tag, long timestamp) { _ourSetService.DownstreamAdd(value, tag, timestamp); var repositoryValues = _repository.GetElements(); var actualValues = repositoryValues.Where(v => Equals(v.Value, value) && v.Tag == tag && v.Timestamp == timestamp); Assert.Single(actualValues); }