How to continue test after JUnit ExpectedException if thrown?

user_1012470 0
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I have set up some JUnit (4.12) test with the ExpectedException feature, and I would like the test to continue after the expected exception. But I never see the log '3', as the execution seems to stop after the exception, event if catch?

Is this actually possible, and how?

@Rule
public ExpectedException exception = ExpectedException.none();

@Test
public void testUserAlreadyExists() throws Exception {
    log.info("1");

    // Create some users
    userService.createUser("toto1");
    userService.createUser("toto2");
    userService.createUser("toto3");
    Assert.assertTrue( userService.userExists("toto1") );
    Assert.assertTrue( userService.userExists("toto2") );
    Assert.assertTrue( userService.userExists("toto3") );

    log.info("2");

    // Try to create an existing user
    exception.expect(AlreadyExistsException.class);
    userService.createUser("toto1");

    log.info("3");
}
expected-exception junit-rule junit4 java
4 Answers

If you don't want to add a lot of similar test methods for something that has many options to throw the expected exception and want to verify that it actually throws on all of the desired cases within a single unit-test instead, I'd suggest this (not pretty maybe) helpful schema:

@Test
public void testThatSomethingExpectedlyFails() {
    for (int i = 1; i <= 3; i++) {
        try {
            switch (i) {
                case 1: // smth here throws the exception when configuration #1;
                case 2: // smth here throws the exception when configuration #2;
                case 3: // smth here throws the exception when configuration #3;
            }
        } catch (ExceptionThatIsExpected expected) {
            continue;
        } catch (Exception unexpected) {
            /* the test must fail when an unexpected exception is thrown */                
            fail("The test has failed due to an unexpected exception: " + unexpected.getMessage()); // or just re-throw this exception
        }

        /* the test must fail when a case completes without the expected exception */
        fail("No expected exception occurred at case " + i);
    }
}

The one could also iterate items (and even execute functions) of some preliminarily prepared list instead of switch-case with hard-coded integers.

user_14446810
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