Packages 
Package Description
org.junit
Provides JUnit core classes and annotations.
org.junit.experimental  
org.junit.experimental.categories  
org.junit.experimental.max  
org.junit.experimental.results  
org.junit.experimental.runners  
org.junit.experimental.theories  
org.junit.experimental.theories.suppliers  
org.junit.matchers
Provides useful additional org.hamcrest.Matchers for use with the org.junit.Assert#assertThat(Object, org.hamcrest.Matcher) statement
org.junit.rules  
org.junit.runner
Provides classes used to describe, collect, run and analyze multiple tests.
org.junit.runner.manipulation
Provides classes to filter or sort tests.
org.junit.runner.notification
Provides information about a test run.
org.junit.runners
Provides standard Runner implementations.
org.junit.runners.model