C# 最小起订量：不可覆盖成员上的无效设置：x => x.GetByTitle("asdf")
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Moq: Invalid setup on a non-overridable member: x => x.GetByTitle("asdf")
提问by mrblah
Not sure how I can fix this, trying to do a unit test on the method "GetByTitle"
不知道如何解决这个问题，尝试对方法“GetByTitle”进行单元测试
Here are my definitions:
以下是我的定义：
public class ArticleDAO : GenericNHibernateDAO(IArticle, int>, IArticleDAO
{
public IArticle GetByTitle(string title)
{
IQuery query = Session.CreateQuery("...")
return query.UniqueResult<IArticle>();
}
}
public interface IArticleDAO
{
IArticle GetByTitle(string title);
}
unit test:
单元测试：
[Test]
public void can_load_by_title()
{
_mockDaoFactory.Setup(x => x.GetArticleDao())
.Returns(_mockArticleDao.Object);
_mockArticleDao.Setup(x => x.GetByTitle("some title"))
.Returns(article1.Object);
_articleManager.LoadArticle("some title");
Assert.IsNotNull(_articleManager.Article);
}
Running the test gives me the error:
运行测试给了我错误：
System.ArgumentException: Invalid setup on a non-overridable member:
x => x.GetByTitle("some title")
Update
更新
My [Setup]looks like:
我的[Setup]样子：
[Setup]
public void SetUp()
{
_mockDaoFactory = new Mock<IDaoFactory>();
_mockArticleDao = new Mock<ArticleDao>();
_articleManager = new ArticleManager(_mockDaoFactory.Object);
}
回答by Tomas Aschan
In order to control the behavior of a mock object (in Moq, at least), you either need to mock an interface, or make sure that the behavior you're trying to control is marked virtual. In your comment, I understand it so that the instantiating of _mockArticleDaois done something like this:
为了控制模拟对象的行为（至少在 Moq 中），您要么需要模拟接口，要么确保您尝试控制的行为被标记为虚拟。在您的评论中，我理解它的实例化_mockArticleDao是这样完成的：
_mockArticleDao = new Mock<ArticleDAO>();
If you want to keep it as so, you need to mark the GetArticlemethod virtual:
如果要保持原样，则需要标记GetArticle方法virtual：
public class ArticleDAO : GenericNHibernateDAO(IArticle, int>, IArticleDAO
{
public virtual IArticle GetByTitle(string title)
{
// ...
}
}
Otherwise (and this is what I recommend), mock the interface instead.
否则（这是我推荐的），而是模拟界面。
_mockArticleDao = new Mock<IArticleDAO>();
