getMap().put(k0(), v0());
    getMap().put(k1(), v1());
    expectAdded(e0(), e1());
  }

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(ONE)
  public void testForcePutKeyPresent() {
    getMap().forcePut(k0(), v1());
    expectContents(mapEntry(k0(), v1()));
    assertFalse(getMap().containsValue(v0()));
    assertNull(getMap().inverse().get(v0()));
    assertEquals(1, getMap().size());