@Test
public void toLowerCaseNoReallocation() {

  final MutableCharArray source = new MutableCharArray("ŁÓdŹ");
  final MutableCharArray result = new MutableCharArray("    z");
  Assertions.assertThat(MutableCharArrayUtils.toLowerCase(source, result)).isTrue();
  Assertions.assertThat(result.getBuffer()).isEqualTo("łódźz".toCharArray());
}