system/serenity
system/serenity
1
0
Fork 0
mirror of https://github.com/SerenityOS/serenity synced 2024-10-07 00:19:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

Tests: Add a test to codify BitStream behavior beyond stream limits

Browse source
This commit is contained in:
Tim Schumacher 2023-11-11 13:21:51 +01:00 committed by Andreas Kling
parent de49413bdf
commit 270b1176de
1 changed files with 47 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

47
Tests/AK/TestBitStream.cpp
View file

@ -132,6 +132,53 @@ TEST_CASE(big_endian_bit_stream_input_output_match)
}
}
TEST_CASE(bit_reads_beyond_stream_limits)
{
Array<u8, 1> const test_data { 0xFF };
{
// LittleEndianInputBitStream allows reading null bits beyond the original data
// for compatibility purposes.
auto memory_stream = make<FixedMemoryStream>(test_data);
auto bit_stream = make<LittleEndianInputBitStream>(move(memory_stream));
{
auto result = TRY_OR_FAIL(bit_stream->read_bits<u8>(6));
EXPECT_EQ(result, 0b111111);
}
{
auto result = TRY_OR_FAIL(bit_stream->read_bits<u8>(6));
EXPECT_EQ(result, 0b000011);
}
{
auto result = TRY_OR_FAIL(bit_stream->read_bits<u8>(6));
EXPECT_EQ(result, 0b000000);
}
}
{
auto memory_stream = make<FixedMemoryStream>(test_data);
auto bit_stream = make<BigEndianInputBitStream>(move(memory_stream));
{
auto result = TRY_OR_FAIL(bit_stream->read_bits<u8>(6));
EXPECT_EQ(result, 0b111111);
}
{
auto result = bit_stream->read_bits<u8>(6);
EXPECT(result.is_error());
}
{
auto result = bit_stream->read_bits<u8>(6);
EXPECT(result.is_error());
}
}
}
RANDOMIZED_TEST_CASE(roundtrip_u8_little_endian)
{
GEN(n, Gen::unsigned_int(NumericLimits<u8>::max()));