assertThat(converter.convert(null)).isNull();
    assertThat(converter.reverse().convert(null)).isNull();
  }

  @J2ktIncompatible
  public void testStringConverter_toString() {
    assertEquals(
        "Enums.stringConverter(com.google.common.base.EnumsTest$TestEnum.class)",
        Enums.stringConverter(TestEnum.class).toString());
  }