public void ShouldAddGetDeleteMark() { //arrange var mark = new Mark { UserId = Guid.Parse("3c8fddae-8ebc-4cd4-9eb2-30ce678d6c23") /*Guid.NewGuid()*/, PostId = Guid.Parse("82243a65-d1e6-440c-a906-5dffb9cd653c") /*Guid.NewGuid()*/, }; //act var dataLayer = new DataLayer.Sql.DataLayer(_connectionString); var addMark = dataLayer.AddMark(mark); var dataLayer1 = new DataLayer.Sql.DataLayer(_connectionString); var getMark = dataLayer1.GetMark(addMark.MarkId); var dataLayer2 = new DataLayer.Sql.DataLayer(_connectionString); int isDeleted = dataLayer2.DeleteMark(getMark.MarkId); //asserts Assert.AreEqual(addMark.MarkId, getMark.MarkId); Assert.AreEqual(addMark.UserId, getMark.UserId); Assert.AreEqual(addMark.PostId, getMark.PostId); Assert.IsNotNull(isDeleted); }