Question

我遇到的问题是我有一堆继承自父类（BasePage）的类（Pages）。每次初始化子类时，我还需要运行一个名为WaitForLoadingToStop（）的方法。我如何继承此方法并将其实现到我的子类的构造函数中？

这是我需要更改的内容，因为它在所有地方都是重复的，因此，我希望在创建类时自动继承并执行它。

        var assPage = new StudentAssesmentPage(Driver);
        assPage.WaitForLoadingToStop();

这是一个示例子类，我有10个看起来像这样的

    public class StudentAssesmentPage : BasePage<StudentAssesmentPageObjectRepository>
{
    public StudentAssesmentPage(IWebDriver driver) : base(driver, new StudentAssesmentPageObjectRepository(driver))
    {}
}

以下是我的BasePage类

    public abstract class BasePage<TObjectRepository> where TObjectRepository : BasePageObjectRepository
{
    protected WebDriverWait Wait { get; }
    protected IWebDriver Driver { get; }
    protected ApplicationUrls ApplicationUrls { get; }
    public IJavaScriptExecutor JavascriptExecutor { get; }
    protected Actions UserInteractions { get; private set; }

    protected By _loadingSpinnerLocator = By.Id("spinner");
    private readonly double LOADING_SPINNER_TIMEOUT = 60;
    private TObjectRepository _objectRepository;

    public BasePage(IWebDriver driver, TObjectRepository repository)
    {
        Driver = driver;
        _objectRepository = repository;
        UserInteractions = new Actions(Driver);
        ApplicationUrls = new ApplicationUrls();
        Wait = new WebDriverWait(Driver, TimeSpan.FromSeconds(GetPageTimeout()));
        JavascriptExecutor = Driver as IJavaScriptExecutor;
    }

    internal TObjectRepository ObjectRepository
    {
        get { return _objectRepository; }
    }

    protected bool WaitForLoadingToStop(int secondsToSleep = 5)
    {
        var sleepTime = TimeSpan.FromSeconds(secondsToSleep);
        Reporter.Debug($"{Helpers.GetCurrentMethodName()}. Going to sleep for:{sleepTime.Seconds}");
        Thread.Sleep(sleepTime);
        Reporter.Debug($"Now, going to wait for loading spinner for:{LOADING_SPINNER_TIMEOUT} seconds.");
        var basePageWait = new WebDriverWait(Driver, TimeSpan.FromSeconds(LOADING_SPINNER_TIMEOUT));
        basePageWait.Message =
            $"Waited for {LOADING_SPINNER_TIMEOUT}sec for the spinner. However, it took longer than that for the application to load.";


        return basePageWait.Until(ExpectedConditions.InvisibilityOfElementLocated(By.XPath("//img[@src='/Content/images/spinner.gif']")));
    }
}

Answer 1

只需从构造函数中为您工作的基类实现BasePageThatWaitsForLoadingToStop继承。剩下的唯一样板代码是将特定实现的构造函数参数（例如StudentAssesmentPage）传递给此基类）

public class StudentAssesmentPage : BasePageThatWaitsForLoadingToStop
{
     public StudentAssesmentPage(IWebDriver driver) : base(driver, new StudentAssesmentPageObjectRepository(driver)) // this is the only boilerplate code that is left
     {

     }
}

public class BasePageThatWaitsForLoadingToStop : BasePage<StudentAssesmentPageObjectRepository>
{
     public BasePageThatWaitsForLoadingToStop(IWebDriver driver) : base(driver, new StudentAssesmentPageObjectRepository(driver))
     {
         base.WaitForLoadingToStop();
     }
}

然后您可以按照以下方式调用它，它会自动为您完成工作：

var assPage = new StudentAssesmentPage(Driver);

但是，请注意，从测试的角度来看，在构造函数中进行工作并不理想。

Answer 2

public class StudentAssesmentPage : BasePage<StudentAssesmentPageObjectRepository>
{
    public StudentAssesmentPage(IWebDriver driver) : base(driver, new StudentAssesmentPageObjectRepository(driver))
    {
        base.WaitForLoadingToStop();
    }
}

如何强制继承类在其构造函数中实现方法？

2 个答案: