*/
    public void testDecode_Null() throws Exception {
        final byte[] result = Base64Util.decode(null);
        assertNull("Null should return null", result);
    }

    /**
     * Test encode/decode round trip with various data
     *
     * @throws Exception
     */
    public void testEncodeDecode_RoundTrip() throws Exception {
        // Test with ASCII text
        final String text = "Hello, World!";

    <sub-class-of type="text/plain"/>
    <glob pattern="*.sfdu"/>
  </mime-type>

  <mime-type type="application/x-spectrum-tzx">
    <_comment>TAP (ZX Spectrum)</_comment>
    <magic priority="50">
      <match value="ZXTape!\x1a" type="string" offset="0"/>
    </magic>
    <glob pattern="*.tzx"/>
  </mime-type>