return maxWeight >= 0;
  }

  boolean customWeigher() {
    return weigher != OneWeigher.INSTANCE;
  }

  boolean expires() {
    return expiresAfterWrite() || expiresAfterAccess();
  }

  boolean expiresAfterWrite() {
    return expireAfterWriteNanos > 0;
  }

  boolean expiresAfterAccess() {
    return expireAfterAccessNanos > 0;
  }

  boolean refreshes() {

    // initial capacity / concurrency level
    assertEquals(16 / map.segments.length, map.segments[0].table.length());

    assertFalse(map.evictsBySize());
    assertFalse(map.expires());
    assertFalse(map.expiresAfterWrite());
    assertFalse(map.expiresAfterAccess());
    assertFalse(map.refreshes());
  }

  public void testSetKeyEquivalence() {
    Equivalence<Object> testEquivalence =
        new Equivalence<Object>() {

    // initial capacity / concurrency level
    assertEquals(16 / map.segments.length, map.segments[0].table.length());

    assertFalse(map.evictsBySize());
    assertFalse(map.expires());
    assertFalse(map.expiresAfterWrite());
    assertFalse(map.expiresAfterAccess());
    assertFalse(map.refreshes());
  }

  public void testSetKeyEquivalence() {
    Equivalence<Object> testEquivalence =
        new Equivalence<Object>() {