java有没有一种方法可以预期超时？

Question

目前，我正在编写一些集成测试，我需要断言对方法的调用至少会阻止调用线程x秒。问题是，我有一个方法将永远阻止，我需要声明它已被阻止至少x秒。有办法吗？唯一的另一个答案是关于JUnit4的，我们正在使用JUnit5。。。提前谢谢你的回答

Answer 1

最后，我选择了不同的策略。您可以看到，我的用例是测试一些JDBCPostgres事务是否会阻塞。相反，我将只等待事务超时开始，并断言从测试开始到超时触发之间的时间。谢谢大家抽出宝贵的时间回答我的问题

Answer 2

您可以使用assertTimeout(Duration timeout, Executable executable)解决您的问题。有关更多信息，请访问JUnit 5 User Guide

    @Test
    void timeoutNotExceeded() {
        // The following assertion succeeds.
        assertTimeout(ofMinutes(2), () -> {
            // Perform task that takes less than 2 minutes.
        });
    }

    @Test
    void timeoutNotExceededWithResult() {
        // The following assertion succeeds, and returns the supplied object.
        String actualResult = assertTimeout(ofMinutes(2), () -> {
            return "a result";
        });
        assertEquals("a result", actualResult);
    }

    @Test
    void timeoutNotExceededWithMethod() {
        // The following assertion invokes a method reference and returns an object.
        String actualGreeting = assertTimeout(ofMinutes(2), AssertionsDemo::greeting);
        assertEquals("Hello, World!", actualGreeting);
    }

    @Test
    void timeoutExceeded() {
        // The following assertion fails with an error message similar to:
        // execution exceeded timeout of 10 ms by 91 ms
        assertTimeout(ofMillis(10), () -> {
            // Simulate task that takes more than 10 ms.
            Thread.sleep(100);
        });
    }

    @Test
    void timeoutExceededWithPreemptiveTermination() {
        // The following assertion fails with an error message similar to:
        // execution timed out after 10 ms
        assertTimeoutPreemptively(ofMillis(10), () -> {
            // Simulate task that takes more than 10 ms.
            new CountDownLatch(1).await();
        });
    }