assertNull(map.get(keyOne));
        assertEquals(0, map.size());
        assertNull(segment.getValueReferenceQueueForTesting().poll());
      }
    }
  }

  // utility methods

  private static Iterable<MapMaker> allWeakKeyStrengthMakers() {
    return ImmutableList.of(createMapMaker().weakKeys(), createMapMaker().weakKeys().weakValues());
  }

        assertNull(map.get(keyOne));
        assertEquals(0, map.size());
        assertNull(segment.getValueReferenceQueueForTesting().poll());
      }
    }
  }

  // utility methods

  private static Iterable<MapMaker> allWeakKeyStrengthMakers() {
    return ImmutableList.of(createMapMaker().weakKeys(), createMapMaker().weakKeys().weakValues());
  }