使用Log4j时，如何在测试失败时写入日志文件

Question

I want to achieve writing to log file with Log4j .

I have found one easy solution - surround test body with try - catch :

@Test(groups = "GMAIL_PAGE")
public void testAllMailLink() {
    try {
        List<WebElement> allMessages = page.takeAllMessage();
        page.clickInboxLink();
        List<WebElement> inboxMessages = page.takeInboxMessage();
        page.clickDraftLink();
        List<WebElement> draftMessages = page.takeDraftMessage();

        Assert.assertTrue(allMessages.containsAll(inboxMessages),
                "All messages doesn't contains all inbox messages");
        Assert.assertTrue(allMessages.containsAll(draftMessages),
                "All messages doesn't contains all draft messages");
        log.info("test is passed");
    } catch (Exception e) {
        log.error(e);
    }
}

But it has some drawbacks - this test is always passed, even if it fails.

It is ok if I work on my machine and able to see console. But what to do when this test is pushed to Continuous Integration server?

Does exist any other way to write info into log file, when test fail?

Answer 1

Add Assert.fail() below your log.error(e) :

catch (Exception e) {
    log.error(e);
    Assert.fail();
}

By the way, you're calling Logger#error(Object) , which uses e.toString() . In this case, it is better to use a descriptive message and then pass the exception to get the respective stacktrace:

catch (Exception e) {
    log.error("Some descriptive message should go here.", e);
    Assert.fail("Some descriptive message should go here as well.");
}