junit testing - assertEquals for exception

Question

How can I use assertEquals to see if the exception message is correct? The test passes but I don\'t know if it hits the correct error or not.

The test I am running.

Answer 1

This is nice library that allows asserting exceptions in a clean way.

Example:

// given: an empty list
List myList = new ArrayList();

// when: we try to get the first element of the list
when(myList).get(1);

// then: we expect an IndexOutOfBoundsException
then(caughtException())
        .isInstanceOf(IndexOutOfBoundsException.class)
        .hasMessage("Index: 1, Size: 0")
        .hasNoCause();