### Question:
GeneratedKeyHolder { public Collection<Long> keys() { return keys; } GeneratedKeyHolder(final Collection<Long> keys); Collection<Long> keys();  }### Answer:
@Test public void shouldCreateGeneratedKeyHolder_withKeys() { final Collection<Long> keys = Arrays.asList(randomLong(), randomLong(), randomLong()); final GeneratedKeyHolder generatedKeyHolder = new GeneratedKeyHolder(keys); assertEquals(keys, generatedKeyHolder.keys()); }