Question

我正在尝试验证调用SetFirefoxOptions()时是否调用了GetFirefoxDriver()。但是无论出于什么原因，Moq一直告诉我没有被调用。我在做什么错了？

这是我的考试：

[TestMethod]
public void ShouldSetFirefoxOptions()
{
    var stubCapabilities = new Mock<SauceCaps>().Object;
    var mockManager = new Mock<DriverManager>();
    mockManager.Setup(
        m => m.GetFirefoxDriver(stubCapabilities)).
        Returns(It.IsAny<IWebDriver>());

    mockManager.Verify(
        m => m.SetFirefoxOptions(stubCapabilities));
}

DriverManager.cs：

public class DriverManager : IDriverManager
{
    public virtual Dictionary<string, object> SauceOptions { get; private set; }    

    public DriverManager()
    {
    }

    public virtual IWebDriver GetFirefoxDriver(SauceCaps sauceCaps)
    {
        var browserOptions = SetFirefoxOptions(sauceCaps);

        return new RemoteWebDriver(new Uri("https://ondemand.saucelabs.com/wd/hub"),
            browserOptions.ToCapabilities(), TimeSpan.FromSeconds(600));
    }

    public virtual FirefoxOptions SetFirefoxOptions(SauceCaps sauceCaps)
    {
        return new FirefoxOptions
        {
            BrowserVersion = sauceCaps.BrowserVersion, 
            PlatformName = sauceCaps.Os
        };
    }
}

Answer 1

您的代码存在的问题是，您不清楚受测系统是什么。您正在同时模拟和测试相同的类。尽管使用 moq （使用CallBase）在技术上是可行的，但原则上是错误的方法。

一种可能性是将SetFirefoxOptions提取到单独的interface中，然后将其注入DriverManager中，例如

public interface IFirefoxOptionCreator
{
    FirefoxOptions SetFirefoxOptions(SauceCaps sauceCaps);
}

public DeviceManager(IFirefoxOptionCreator optionCreator)
{
    _optionCreator = optionCreator;
}

public virtual IWebDriver GetFirefoxDriver(SauceCaps sauceCaps)
{
    var browserOptions = _optionCreator.SetFirefoxOptions(sauceCaps);

    return new RemoteWebDriver(new Uri("https://ondemand.saucelabs.com/wd/hub"),
        browserOptions.ToCapabilities(), TimeSpan.FromSeconds(600));
}

然后您可以轻松地验证在单元测试中是否调用了接口方法：

[TestMethod]
public void ShouldSetFirefoxOptions()
{
    // Arrange
    var stubCapabilities = new Mock<SauceCaps>().Object;    
    var optionCreatorMock = new Mock<IFirefoxOptionCreator>();
    optionCreatorMock.Setup(m => m.SetFirefoxOptions(It.IsAny<SauceCaps>()))
                     .Returns(new FirefoxOptions());
    var sut = new DriverManager();    

    // Act
    _ = sut.GetFirefoxDriver(stubCapabilities);

    // Assert
    optionCreatorMock.Verify(m => m.SetFirefoxOptions(stubCapabilities));
}

如何验证Moq是否已调用方法？

1 个答案: