java - 如何测试 InterruptedException

Question

我有以下方法，效果很好。我正在尝试测试抛出 InterruptedException 的场景。这就是我目前正在测试的方式，如果我只运行这个单一测试，它会起作用。但是如果我要在我的测试类中运行所有剩余的 5 个测试，一些测试就会失败。当我单独运行所有测试时，所有测试都会通过，因此很明显，我在测试中的线程中断正在影响其他测试。我怎样才能以不影响其他测试的方式编写我的测试？

@Component
class A{
    @Autowired
    private Helper helper;

    private static ExecutorService executor = Executors.newFixedThreadPool(10);

    // static variable in class
    private final Future<String> number = executor.submit(() -> helper.method());

    //method to be tested 
    public String getNumber() {
        try {
            return this.number.get();
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            throw new CustomException1();
        } catch (ExecutionException e) {
            throw new CustomException2();
        }
    }
}

@RunWith(MockitoJUnitRunner.class)
clas ATest{

    @InjectMocks
    private A a;

    @Mock
    private Helper helper;

    // this is my test method which passes when ran individually. But will affect other tests if everything is ran same time. 
    @Test
    public void testMethod() {

        when(helper.method()).thenReturn("222");
        String num = a.getNumber();

        // doing this on purpose so I would land inside the catch. This line is causing issues.
        Thread.currentThread().interrupt();

        try {
            assertEquals("222", num);
        }catch (CustomException1 e){
            // I will land here for this test as expected
            // do some assertions
        }

        // Thread.currentThread().interrupt(); // Tried calling it again here to clear the flag but doesn't work. 
    }

    // another few tests ..... 
}

Answer 1

我认为最好的方法是模拟中断的异常

when(helper.method())).thenThrow(InterruptedException.class);

但是你也可以通过调用方法清除中断标志:

Thread.interrupted()