org.junit.internal.runners.ErrorReportingRunner#androidx.test.internal.runner.junit4.AndroidJUnit4ClassRunner源码实例Demo

/** Constructs a new instance of the default runner */
public AndroidJUnit4(Class<?> klass, AndroidRunnerParams runnerParams)
    throws InitializationError {
  // this is expected to be called when in Android environment.
  delegate = new AndroidJUnit4ClassRunner(klass, runnerParams);
}
 

@Test
public void testLoadTests_junit4() {
  assertLoadTestSuccess(JUnit4Test.class, AndroidJUnit4ClassRunner.class);
}
 

@Test
public void testLoadTests_all() {
  Collection<String> classNames =
      Arrays.asList(
          JUnit3Test.class.getName(),
          EmptyJUnit3Test.class.getName(),
          JUnit4Test.class.getName(),
          JUnit4RunTest.class.getName(),
          NotATest.class.getName(),
          CustomTest.class.getName(),
          "notexist",
          AbstractTest.class.getName(),
          SubClassJUnit4Test.class.getName(),
          SubClassAbstractTest.class.getName());

  List<Runner> runners = loader.getRunnersFor(classNames, false);
  List<Class<? extends Runner>> runnerClasses = new ArrayList<>();
  for (Runner runner : runners) {
    runnerClasses.add(runner == null ? null : runner.getClass());
  }

  List<Class<? extends Runner>> expectedRunnerClasses;
  if (scanningPath) {
    // When scanning path TestLoader is stricter about what it will accept as a test.
    expectedRunnerClasses =
        Arrays.asList(
            JUnit38ClassRunner.class,
            AndroidJUnit4ClassRunner.class,
            ErrorReportingRunner.class,
            UnloadableClassRunner.class,
            AndroidJUnit4ClassRunner.class,
            JUnit38ClassRunner.class);
  } else {
    expectedRunnerClasses =
        Arrays.asList(
            JUnit38ClassRunner.class,
            JUnit38ClassRunner.class,
            AndroidJUnit4ClassRunner.class,
            ErrorReportingRunner.class,
            ErrorReportingRunner.class,
            ErrorReportingRunner.class,
            UnloadableClassRunner.class,
            JUnit38ClassRunner.class,
            AndroidJUnit4ClassRunner.class,
            JUnit38ClassRunner.class);
  }
  assertEquals(expectedRunnerClasses, runnerClasses);
}
 

@Test
public void testLoadTests_junit4SubclassAbstract() {
  assertLoadTestSuccess(SubClassJUnit4Test.class, AndroidJUnit4ClassRunner.class);
}