Pragmatic Unit Testing in Java with JUnit, 3rd Edition

Other Common JUnit Assertion Forms

While assertEquals and assertTrue would cover almost all the assertions you’ll need to write, you’ll want to learn about the other forms that JUnit supports. Choosing the best assertion for the job will keep your tests concise and clear.

In this section, you’ll be introduced to the majority of JUnit’s other assertion forms, including assertFalse, assertNotEquals, assertSame, assertNotSame, assertNull, and assertNotNull. You’ll also get an experience-based opinion on the value and best uses for each variant.

assertFalse

Nobody doesn’t dislike double negatives (or triple negatives, so says my editor). To help you say things “straight up” in your tests, JUnit provides some inverse assertions. Here’s assertFalse ...