assertSame(testEquivalence, map.keyEquivalence);
    assertSame(map.valueStrength.defaultEquivalence(), map.valueEquivalence);
  }

  public void testSetValueEquivalence() {
    Equivalence<Object> testEquivalence =
        new Equivalence<Object>() {
          @Override
          protected boolean doEquivalent(Object a, Object b) {
            return false;
          }