jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <AK/CharacterTypes.h>
8#include <LibIMAP/QuotedPrintable.h>
9#include <LibTest/TestCase.h>
10
11TEST_CASE(test_decode)
12{
13 auto decode_equal = [](StringView input, StringView expected) {
14 auto decoded = MUST(IMAP::decode_quoted_printable(input));
15 EXPECT(decoded.bytes() == expected.bytes());
16 };
17
18 auto decode_equal_byte_buffer = [](StringView input, StringView expected) {
19 auto decoded = MUST(IMAP::decode_quoted_printable(input));
20 EXPECT(decoded.bytes() == expected.bytes());
21 };
22
23 decode_equal("hello world"sv, "hello world"sv);
24 decode_equal("=3D"sv, "="sv);
25 decode_equal("hello=\r\n world"sv, "hello world"sv);
26 decode_equal("=68=65=6C=6C=6F=20=\r\n=77=6F=72=6C=64"sv, "hello world"sv);
27
28 // Doesn't mistake hex sequences without a preceding '=' as an escape sequence.
29 decode_equal("4A=4B=4C4D"sv, "4AKL4D"sv);
30
31 // Allows lowercase escape sequences.
32 decode_equal("=4a=4b=4c=4d=4e=4f"sv, "JKLMNO"sv);
33
34 // Bytes for U+1F41E LADY BEETLE
35 decode_equal_byte_buffer("=F0=9F=90=9E"sv, "\xF0\x9F\x90\x9E"sv);
36
37 // Illegal characters. If these aren't escaped, they are simply ignored.
38 // Illegal characters are:
39 // - ASCII control bytes that aren't tab, carriage return or new line
40 // - Any byte above 0x7E
41 StringBuilder illegal_character_builder;
42 for (u16 byte = 0; byte <= 0xFF; ++byte) {
43 if (byte > 0x7E || (is_ascii_control(byte) && byte != '\t' && byte != '\r' && byte != '\n'))
44 illegal_character_builder.append(byte);
45 }
46
47 auto illegal_character_decode = MUST(IMAP::decode_quoted_printable(illegal_character_builder.to_deprecated_string()));
48 EXPECT(illegal_character_decode.is_empty());
49}