k -> {
              assertNull(k);
              return v3();
            });
    expectAdded(entry(null, v3()));
  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testComputeIfAbsent_functionThrows() {
    assertThrows(
        SomeUncheckedException.class,
        () ->
            getMap()
                .computeIfAbsent(
                    k3(),
                    k -> {