RSpec Style Runner for JUnit

ArrayListTest.java

@RunWith(BehaviourRunner.class)
@ItBehavesLike(ListBehaviours.class)
public class ArrayListTest {
	@Subject ArrayList<String> list(){
		return new ArrayList<String>(); 
	}
}

LinkedListTest.java

@RunWith(BehaviourRunner.class)
@ItBehavesLike(ListBehaviours.class)
public class LinkedListTest {
	@Subject LinkedList<String> list(){
		return new LinkedList<String>(); 
	}
}

ListBehaviours.java

public class ListBehaviours {
	@It void shouldAddElements(List<String> subject){
		assertThat(subject, hasSize(0));
		list.add("An element");
		assertThat(subject, hasSize(1));
	}

	@It void shouldRemoveElements(List<String> subject){
		assertThat(subject, hasSize(0));
		list.add("An element");
		assertThat(subject, hasSize(1));
		assertThat(subject, contains("An element"));
		list.remove(0);
		assertThat(subject, hasSize(0));
	}
}

StringTest.java

@RunWith(BehaviourRunner.class)
public class StringTest {
	@Subject String string(){ return "Some string"; }
	
	@It void shouldStartWithSome(String subject){
		assertThat(subject, startsWith("Some"));
	}
}