junit源码之Runner

Runner

　　定义了执行用例的执行器方法。

public abstract class Runner implements Describable {
    /*
    获取描述
     */
    public abstract Description getDescription();

    /**
     运行测试用例*/
    public abstract void run(RunNotifier notifier);

    /***/
    public int testCount() {
        return getDescription().testCount();
    }
}

ParentRunner

@Override
    public void run(final RunNotifier notifier) {
        EachTestNotifier testNotifier = new EachTestNotifier(notifier,
                getDescription());
        testNotifier.fireTestSuiteStarted();
        try {
            Statement statement = classBlock(notifier);
            statement.evaluate();
        } catch (AssumptionViolatedException e) {
            testNotifier.addFailedAssumption(e);
        } catch (StoppedByUserException e) {
            throw e;
        } catch (Throwable e) {
            testNotifier.addFailure(e);
        } finally {
            testNotifier.fireTestSuiteFinished();
        }
    }

BlockJUnit4ClassRunner