相关疑难解决方法(0)

我有一个单元测试,我必须模拟一个返回bool类型的非虚方法

public class XmlCupboardAccess
{
    public bool IsDataEntityInXmlCupboard(string dataId,
                                          out string nameInCupboard,
                                          out string refTypeInCupboard,
                                          string nameTemplate = null)
    {
        return IsDataEntityInXmlCupboard(_theDb, dataId, out nameInCupboard, out refTypeInCupboard, nameTemplate);
    }
}

所以我有一个XmlCupboardAccess类的模拟对象,我试图在我的测试用例中为这个方法设置mock,如下所示

[TestMethod]
Public void Test()
{
    private string temp1;
    private string temp2;
    private Mock<XmlCupboardAccess> _xmlCupboardAccess = new Mock<XmlCupboardAccess>();
    _xmlCupboardAccess.Setup(x => x.IsDataEntityInXmlCupboard(It.IsAny<string>(), out temp1, out temp2, It.IsAny<string>())).Returns(false); 
    //exception is thrown by this line of code
}

但是这条线引发了异常

Invalid setup on a non-virtual (overridable in VB) member: 
x => x.IsDataEntityInXmlCupboard(It.IsAny<String>(), …

使用Moq进行单元测试时,出现以下错误:

Message: System.NotSupportedException : 
    Invalid setup on non-virtual (overridable in VB) member: 
    cm => cm.AppSettings[It.IsAny<string>()]

根据这些发现,我理解最好使用Moq的抽象类或接口.

• 为什么我想要模拟的属性需要是虚拟的？
• 当类在Service Project中时,Moq会在不可覆盖的成员上抛出无效设置
• 非虚拟(在VB中可覆盖)成员上的设置无效
• Moq:非可覆盖成员的设置无效:x => x.GetByTitle("asdf")

简而言之,我完成了我的作业.=)

但是,如果我实际使用的是接口呢？

ConfigurationServiceTests

[TestFixture]
public class ConfigurationServiceTests {
    [Test]
    public void DialectShouldQueryConfigurationManagerAppSettings() {
        // Given
        configurationManagerMock
            .Setup(cm => cm.AppSettings[It.IsAny<string>()])
            .Returns(It.IsAny<string>());

        // When
        var dialect = configurationService.Dialect;

        // Then
        dialect.Should().BeOfType<string>();
        configurationManagerMock.Verify(cm => cm.AppSettings[It.IsAny<string>()]);
    }

    [SetUp]
    public void ConfigurationServiceSetUp() {
        configurationManagerMock = new Mock<IConfigurationManager>();
        configurationService = 
            new ConfigurationService(configurationManagerMock.Object);
    }

    private Mock<IConfigurationManager> configurationManagerMock;
    private IConfigurationService configurationService;
}

IConfigurationManager

public interface …