public void DeleteTest() { _dataManage.Delete("drink", -1); _dataManage.Delete("drink", 0); _dataManage.Delete("addition", -1); _dataManage.Delete("addition", 0); _dataManage.AddData("ddd", 894, "drink"); _dataManage.AddData("aaa", 894, "addition"); Assert.AreNotEqual(_dataManage.ExistItem("ddd"), null); Assert.AreNotEqual(_dataManage.ExistItem("aaa"), null); _dataManage.Delete("drink", 0); Assert.AreEqual(_dataManage.ExistItem("ddd"), null); _dataManage.Delete("addition", 0); Assert.AreEqual(_dataManage.ExistItem("aaa"), null); }