如何获取测试类实例JUnit从ClassRunner内部运行测试用例？

Question

我有一个扩展BlockJUnit4ClassRunner的自定义测试运行器，我想获得在我的自定义测试运行器中的BlockJUnit4ClassRunner中实例化的测试类的实例。

Answer 1

I figured this one out.

What you can do is override createTest() in BlockJUnit4ClassRunner, and pass the result of super.createTest() to a method of your choice. For example:

public class CustomTestRunner extends AbstractTestRunner {

    @Override
    public abstract void prepareTest(final Object test) {
     // have your way with the test object
    }
}

public abstract class AbstractTestRunner extends BlockJUnit4ClassRunner {

    @Override
    public Object createTest() throws Exception {
         Object test = super.createTest();
         prepareTest(test);
         return test;
    }

    public abstract void prepareTest(final Object test);
}