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/*
* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/CharacterTypes.h>
#include <LibIMAP/QuotedPrintable.h>
#include <LibTest/TestCase.h>
TEST_CASE(test_decode)
{
auto decode_equal = [](StringView input, StringView expected) {
auto decoded = MUST(IMAP::decode_quoted_printable(input));
EXPECT(decoded.bytes() == expected.bytes());
};
auto decode_equal_byte_buffer = [](StringView input, StringView expected) {
auto decoded = MUST(IMAP::decode_quoted_printable(input));
EXPECT(decoded.bytes() == expected.bytes());
};
decode_equal("hello world"sv, "hello world"sv);
decode_equal("=3D"sv, "="sv);
decode_equal("hello=\r\n world"sv, "hello world"sv);
decode_equal("=68=65=6C=6C=6F=20=\r\n=77=6F=72=6C=64"sv, "hello world"sv);
// Doesn't mistake hex sequences without a preceding '=' as an escape sequence.
decode_equal("4A=4B=4C4D"sv, "4AKL4D"sv);
// Allows lowercase escape sequences.
decode_equal("=4a=4b=4c=4d=4e=4f"sv, "JKLMNO"sv);
// Bytes for U+1F41E LADY BEETLE
decode_equal_byte_buffer("=F0=9F=90=9E"sv, "\xF0\x9F\x90\x9E"sv);
// Illegal characters. If these aren't escaped, they are simply ignored.
// Illegal characters are:
// - ASCII control bytes that aren't tab, carriage return or new line
// - Any byte above 0x7E
StringBuilder illegal_character_builder;
for (u16 byte = 0; byte <= 0xFF; ++byte) {
if (byte > 0x7E || (is_ascii_control(byte) && byte != '\t' && byte != '\r' && byte != '\n'))
illegal_character_builder.append(byte);
}
auto illegal_character_decode = MUST(IMAP::decode_quoted_printable(illegal_character_builder.to_deprecated_string()));
EXPECT(illegal_character_decode.is_empty());
}
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