// The following test vectors are specified in RFC 4648 itself
    testEncodingWithCasing(base32Hex(), "", "");
    testEncodingWithCasing(base32Hex(), "f", "CO======");
    testEncodingWithCasing(base32Hex(), "fo", "CPNG====");
    testEncodingWithCasing(base32Hex(), "foo", "CPNMU===");
    testEncodingWithCasing(base32Hex(), "foob", "CPNMUOG=");
    testEncodingWithCasing(base32Hex(), "fooba", "CPNMUOJ1");