### Question:
ItemDefinitionStore { public void index(final String uuid, final ItemDefinition itemDefinition) { itemDefinitions.put(uuid, itemDefinition); }  ItemDefinition get(final String uuid); void index(final String uuid,
                      final ItemDefinition itemDefinition); void clear(); void unIndex(final String uuid);  }### Answer:
@Test public void testIndex() { final ItemDefinition itemDefinition = mock(ItemDefinition.class); final String uuid = "789"; store.index(uuid, itemDefinition); assertEquals(itemDefinition, store.get(uuid)); }