assertThrows(IllegalArgumentException.class, () -> Ascii.truncate("foobar", -1, "..."));

    assertThrows(IllegalArgumentException.class, () -> Ascii.truncate("foobar", -1, ""));
  }

  public void testEqualsIgnoreCase() {
    assertTrue(Ascii.equalsIgnoreCase("", ""));
    assertFalse(Ascii.equalsIgnoreCase("", "x"));
    assertFalse(Ascii.equalsIgnoreCase("x", ""));
    assertTrue(Ascii.equalsIgnoreCase(LOWER, UPPER));

        assertEquals("5", false, StringUtil.equals("a", "b"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testEqualsIgnoreCase() throws Exception {
        assertEquals("1", true, StringUtil.equalsIgnoreCase("a", "a"));
        assertEquals("2", true, StringUtil.equalsIgnoreCase("a", "A"));