TestNG: How to test for mandatory exceptions?

Question

I\'d like to write a TestNG test to make sure an exception is thrown under a specific condition, and fail the test if the exception is not thrown. Is there an easy way to do

Answer 1

Use @Test annotation to check expected exceptions.

@Test(
    expectedExceptions = AnyClassThatExtendsException.class,
    expectedExceptionsMessageRegExp = "Exception message regexp"
)

Or if you don't want to check for exception message, only below is enough

@Test(expectedExceptions = AnyClassThatExtendsException.class)

In that way, you don't need to use ugly try catch block, just invoke you exception-thrower method inside the test.