testEncodesWithOffset(base32(), "foobar", 2, 3, "N5RGC===");
    testEncodesWithOffset(base32(), "foobar", 3, 1, "MI======");
    testEncodesWithOffset(base32(), "foobar", 4, 0, "");
  }

  public void testBase32Hex() {
    // The following test vectors are specified in RFC 4648 itself
    testEncodingWithCasing(base32Hex(), "", "");
    testEncodingWithCasing(base32Hex(), "f", "CO======");