.isEqualTo("FooBar");
    assertThat(LOWER_CAMEL.converterTo(UPPER_UNDERSCORE).reverse().convert("FOO_BAR"))
        .isEqualTo("fooBar");
  }

  public void testConverter_nullConversions() {
    for (CaseFormat outer : CaseFormat.values()) {
      for (CaseFormat inner : CaseFormat.values()) {
        assertThat(outer.converterTo(inner).convert(null)).isNull();