Testing for multiple exceptions with JUnit 4 annotations

Question

Is it possible to test for multiple exceptions in a single JUnit unit test? I know for a single exception one can use, for example

    @Test(expected=Illega         


        

Answer 1

This is not possible with the annotation.

With JUnit 4.7 you can use the new ExpectedException rule

public static class HasExpectedException {
    @Interceptor
    public ExpectedException thrown= new ExpectedException();

    @Test
    public void throwsNothing() {
    }

    @Test
    public void throwsNullPointerException() {
         thrown.expect(NullPointerException.class);
         throw new NullPointerException();
    }

    @Test
    public void throwsNullPointerExceptionWithMessage() {
        thrown.expect(NullPointerException.class);
        thrown.expectMessage("happened?");
        throw new NullPointerException("What happened?");
    }
}

More see

• JUnit 4.7: Interceptors: expected exceptions
• Rules in JUnit 4.7

---

If updating to JUnit 4.7 is not possible for you, you have to write a bare unit test of the form

public test() {
    try {
        methodCall(); // should throw Exception
        fail();
    }
    catch (Exception ex) {
        assert((ex instanceof A) || (ex instanceof B) || ...etc...);
        ...
    }

}