JUnit 4.4

JUnit is a simple framework for writing and running automated tests. As a political gesture, it celebrates programmers testing their own software.
JUnit 4.4 includes several major new features designed to even better capture developer intent:

- New assertion syntax

assertThat(string, containsString("abc"));

- Explicit support for environment assumptions:

assumeThat(File.separatorChar, is(/));

- Theories (globally true statements):

@Theory public void filenameIncludesUsername(String username) {
assumeThat(username, not(containsString("/")));
assertThat(new User(username).configFileName(), containsString(username));
}