@Test
public void testAddAll() {

	Vocabulary vocabulary = new Vocabulary();
	vocabulary.addAll(Arrays.asList("only one", "we are 2", "we are 2"));
	assertEquals(1, vocabulary.count("only one").intValue());
	assertEquals(2, vocabulary.count("we are 2").intValue());
	assertEquals(0, vocabulary.count("I'm not here").intValue());
}