@Test public void testInternId() { HashKeyIndex idx = new HashKeyIndex(); assertThat(idx.size(), equalTo(0)); assertThat(idx.tryGetIndex(42), lessThan(0)); assertThat(idx.internId(42), equalTo(0)); assertThat(idx.getKey(0), equalTo(42L)); assertThat(idx.tryGetIndex(42), equalTo(0)); }