Question

我有一个自定义视图，我需要调用一个特定的方法来打开一个活动。在浓缩咖啡测试中，这样做的正确方法是什么？我只需要膨胀这个视图，或者我需要编写一个自定义的ViewAction？

Answer 1

您可以像这样创建自定义ViewAction

public class MyCustomViewAction implements ViewAction{

    @Override
    public Matcher<View> getConstraints(){
        return isAssignableFrom(YourCustomView.class);
    }


    @Override
    public String getDescription(){
        return "whatever";
    }

    @Override
    public void perform(UiController uiController, View view){
        YourCustomView yourCustomView = (YourCustomView) view;
        yourCustomView.yourCustomMethod();
        // tadaaa
    }

}

并像往常一样使用它，例如

onView(withId(whatever)).perform(new MyCustomViewAction());

Answer 2

为了在断言中使用自定义方法的结果，我提出了对lellomans答案的以下修改：

public class MyCustomViewAction implements ViewAction{
    MyReturnObject returnValue = null;

    @Override
    public Matcher<View> getConstraints(){
        return isAssignableFrom(YourCustomView.class);
    }


    @Override
    public String getDescription(){
        return "whatever";
    }

    @Override
    public void perform(UiController uiController, View view){
        YourCustomView yourCustomView = (YourCustomView) view;
        // store the returnValue   
        returnValue = yourCustomView.yourCustomMethod();
    }   
}

我创建了一个myAction对象供以后重用，而不是创建一个新的MyCustomViewAction（）。

MyCustomViewAction myAction = new MyCustomViewAction();
onView(withId(whatever)).perform(myAction);
MyReturnObject returnValueForSpecialAssertions = myAction.returnValue;
// assert something with returnValueForSpecialAssertions

如何在espresso测试中调用自定义视图上的方法？

2 个答案: