v3(),
        getMap()
            .merge(
                getKeyForNullValue(),
                v3(),
                (oldV, newV) -> {
                  throw new AssertionFailedError(
                      "Should not call merge function if key was mapped to null");
                }));
    expectReplacement(entry(getKeyForNullValue(), v3()));
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})

        v3(),
        getMap()
            .merge(
                getKeyForNullValue(),
                v3(),
                (oldV, newV) -> {
                  throw new AssertionFailedError(
                      "Should not call merge function if key was mapped to null");
                }));
    expectReplacement(entry(getKeyForNullValue(), v3()));
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})

        getMap().put(getKeyForNullValue(), null));
    expectContents(createArrayWithNullValue());
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  @CollectionSize.Require(absent = ZERO)
  public void testPut_replaceNullValueWithNonNullSupported() {
    Entry<K, V> newEntry = entry(getKeyForNullValue(), v3());
    initMapWithNullValue();

        getMap().put(getKeyForNullValue(), null));
    expectContents(createArrayWithNullValue());
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
  @CollectionSize.Require(absent = ZERO)
  public void testPut_replaceNullValueWithNonNullSupported() {
    Entry<K, V> newEntry = entry(getKeyForNullValue(), v3());
    initMapWithNullValue();