ExceptionHandling with TestNG

Question

I referred the below link - http://www.mkyong.com/unittest/testng-tutorial-2-expected-exception-test/ to test exceptions using TestNG. How do I print the message from the calling method? For eg, when orderBo.save(null); is called, how do I print - Order is empty!

Answer 1

You can use, along the expectedExceptions parameter to the @Test annotation, the expectedExceptionsMessageRegEx. However, this becomes quite a messy annotation:

@Test(
    expectedExceptions = MyException.class,
    expectedExceptionsMessageRegEx = "^regex for message here$"
)
public void testWhatever() 
{
    codeThatRaisesSomeException();
}

And note that the parameter value, as the parameter name suggests, is a regular expression...

Rather than that, why not just do this:

@Test
public void testWhatever()
{
    try {
        codeThatRaisesSomeException();
        fail("No exception thrown!");
    catch (MyException e) {
        assertEquals(e.getMessage(), "the expected message here");
    }
}

Ultimately, that is a matter of tastes; yours truly finds the latter more readable...