Interners.newBuilder().strong().concurrencyLevel(concurrencyLevel).build();
    InternerImpl<Object> internerImpl = (InternerImpl<Object>) interner;
    assertEquals(Strength.STRONG, internerImpl.map.keyStrength());
  }

  public void testWeak_simplistic() {
    String canonical = "a";
    String not = new String("a");

    Interner<String> pool = Interners.newWeakInterner();

  }

  private static void checkStrength(
      LocalCache<Object, Object> map, Strength keyStrength, Strength valueStrength) {
    assertThat(map.keyStrength).isEqualTo(keyStrength);
    assertThat(map.valueStrength).isEqualTo(valueStrength);
    assertThat(map.keyEquivalence).isSameInstanceAs(keyStrength.defaultEquivalence());
    assertThat(map.valueEquivalence).isSameInstanceAs(valueStrength.defaultEquivalence());
  }

  }

  private static void checkStrength(
      LocalCache<Object, Object> map, Strength keyStrength, Strength valueStrength) {
    assertThat(map.keyStrength).isEqualTo(keyStrength);
    assertThat(map.valueStrength).isEqualTo(valueStrength);
    assertThat(map.keyEquivalence).isSameInstanceAs(keyStrength.defaultEquivalence());
    assertThat(map.valueEquivalence).isSameInstanceAs(valueStrength.defaultEquivalence());
  }

        Interners.newBuilder().strong().concurrencyLevel(concurrencyLevel).build();
    InternerImpl<Object> internerImpl = (InternerImpl<Object>) interner;
    assertEquals(Strength.STRONG, internerImpl.map.keyStrength());
  }

  public void testWeak_simplistic() {
    String canonical = "a";
    String not = new String("a");

    Interner<String> pool = Interners.newWeakInterner();

  public void testIdentityKeyEquality_weakKeys() {
    testIdentityKeyEquality(WEAK);
  }

  private void testIdentityKeyEquality(MapMakerInternalMap.Strength keyStrength) {

    ConcurrentMap<String, AtomicInteger> map =
        new MapMaker().setKeyStrength(keyStrength).keyEquivalence(Equivalence.identity()).makeMap();

    ConcurrentHashMultiset<String> multiset = ConcurrentHashMultiset.create(map);

  }

  private static void checkStrength(
      MapMakerInternalMap<Object, Object, ?, ?> map, Strength keyStrength, Strength valueStrength) {
    assertThat(map.keyStrength()).isEqualTo(keyStrength);
    assertThat(map.valueStrength()).isEqualTo(valueStrength);
    assertSame(keyStrength.defaultEquivalence(), map.keyEquivalence);
    assertSame(valueStrength.defaultEquivalence(), map.valueEquivalence());
  }

  }

  private static void checkStrength(
      MapMakerInternalMap<Object, Object, ?, ?> map, Strength keyStrength, Strength valueStrength) {
    assertThat(map.keyStrength()).isEqualTo(keyStrength);
    assertThat(map.valueStrength()).isEqualTo(valueStrength);
    assertSame(keyStrength.defaultEquivalence(), map.keyEquivalence);
    assertSame(valueStrength.defaultEquivalence(), map.valueEquivalence());
  }