@Test public void testEmpty() { KeyIndex empty = new FrozenHashKeyIndex(LongLists.EMPTY_LIST); assertThat(empty.getKeyList(), hasSize(0)); assertThat(empty.containsKey(30), equalTo(false)); assertThat(empty.tryGetIndex(30), equalTo(-1)); try { empty.getIndex(30); fail("getting absent index should fail"); } catch (IllegalArgumentException ex) { /* expected */ } }
@Test public void testSingleton() { KeyIndex idx = new FrozenHashKeyIndex(LongLists.singleton(42)); assertThat(idx.getKeyList(), hasSize(1)); assertThat(idx.getKeyList(), contains(42L)); assertThat(idx.containsKey(30), equalTo(false)); assertThat(idx.containsKey(42), equalTo(true)); assertThat(idx.tryGetIndex(30), equalTo(-1)); assertThat(idx.tryGetIndex(42), equalTo(0)); assertThat(idx.getIndex(42), equalTo(0)); assertThat(idx.getKey(0), equalTo(42L)); try { idx.getIndex(30); fail("getting absent index should fail"); } catch (IllegalArgumentException ex) { /* expected */ } }