JUnit vs Fest by example

I assume you know what a Junit assertion is (assertEquals, assertSame, …). Fest assertions is a mini framework that increases readability of our assertions. Some people still use Hamcrest, but it has many disadvantages when you compare it to fest. (I was using Hamcrest for 6 months, then switched to Fest. Now I use Hamcrest only when I have to. For example when I work on an old codebase, etc.)

Please find a simple and quick comparison of pure Junit asserions and Fest assertions below.



The most important things I would say about Fest is:

  1. you don’t have to think about the order of parameters (which one is expected, which one is the actual one)
  2. is has a fluent interface, eg. assertThat(obj).hasSomething(a).hasSomethingElse(b).doesNotContain(b)
  3. when you use it for some time you realize that hamcrest and pure junit offer very poor usability
  4. the assertions are a lot more readable then junit and hamcrest ones