}

  @SuppressWarnings("nullness") // test of a bogus call
  public void testPadStart_null() {
    assertThrows(NullPointerException.class, () -> Strings.padStart(null, 5, '0'));
  }

  public void testPadEnd_noPadding() {
    assertThat(Strings.padEnd("", 0, '-')).isSameInstanceAs("");
    assertThat(Strings.padEnd("x", 0, '-')).isSameInstanceAs("x");
    assertThat(Strings.padEnd("x", 1, '-')).isSameInstanceAs("x");