@Test
public void testKeys() throws Exception {
BitSetObjectMap<String> map = new BitSetObjectMap<String>(DEFAULT_VALUE).add(bs(1), "55");
assertThat(map.keys(), arrayContaining(bs(1)));
}
@Test
public void testKeysEmpty() throws Exception {
BitSetObjectMap<String> map = new BitSetObjectMap<String>(DEFAULT_VALUE);
assertThat(map.keys().length, equalTo(0));
}