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AK: Add roundtrip tests for BitStream
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@ -8,6 +8,8 @@
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#include <AK/MemoryStream.h>
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#include <LibTest/TestCase.h>
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using namespace Test::Randomized;
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// Note: This does not do any checks on the internal representation, it just ensures that the behavior of the input and output streams match.
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TEST_CASE(little_endian_bit_stream_input_output_match)
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{
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@ -129,3 +131,90 @@ TEST_CASE(big_endian_bit_stream_input_output_match)
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EXPECT_EQ(0b1101001000100001u, result);
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}
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}
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RANDOMIZED_TEST_CASE(roundtrip_u8_little_endian)
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{
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GEN(n, Gen::unsigned_int(NumericLimits<u8>::max()));
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auto memory_stream = make<AllocatingMemoryStream>();
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LittleEndianOutputBitStream sut_write { MaybeOwned<Stream>(*memory_stream) };
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LittleEndianInputBitStream sut_read { MaybeOwned<Stream>(*memory_stream) };
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MUST(sut_write.write_bits(n, 8));
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MUST(sut_write.flush_buffer_to_stream());
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auto result = MUST(sut_read.read_bits<u64>(8));
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EXPECT_EQ(result, n);
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}
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RANDOMIZED_TEST_CASE(roundtrip_u16_little_endian)
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{
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GEN(n, Gen::unsigned_int(NumericLimits<u16>::max()));
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auto memory_stream = make<AllocatingMemoryStream>();
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LittleEndianOutputBitStream sut_write { MaybeOwned<Stream>(*memory_stream) };
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LittleEndianInputBitStream sut_read { MaybeOwned<Stream>(*memory_stream) };
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MUST(sut_write.write_bits(n, 16));
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MUST(sut_write.flush_buffer_to_stream());
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auto result = MUST(sut_read.read_bits<u64>(16));
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EXPECT_EQ(result, n);
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}
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RANDOMIZED_TEST_CASE(roundtrip_u32_little_endian)
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{
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GEN(n, Gen::unsigned_int(NumericLimits<u32>::max()));
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auto memory_stream = make<AllocatingMemoryStream>();
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LittleEndianOutputBitStream sut_write { MaybeOwned<Stream>(*memory_stream) };
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LittleEndianInputBitStream sut_read { MaybeOwned<Stream>(*memory_stream) };
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MUST(sut_write.write_bits(n, 32));
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MUST(sut_write.flush_buffer_to_stream());
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auto result = MUST(sut_read.read_bits<u64>(32));
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EXPECT_EQ(result, n);
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}
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RANDOMIZED_TEST_CASE(roundtrip_u8_big_endian)
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{
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GEN(n, Gen::unsigned_int(NumericLimits<u8>::max()));
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auto memory_stream = make<AllocatingMemoryStream>();
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BigEndianOutputBitStream sut_write { MaybeOwned<Stream>(*memory_stream) };
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BigEndianInputBitStream sut_read { MaybeOwned<Stream>(*memory_stream) };
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MUST(sut_write.write_bits(n, 8));
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auto result = MUST(sut_read.read_bits<u64>(8));
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EXPECT_EQ(result, n);
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}
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RANDOMIZED_TEST_CASE(roundtrip_u16_big_endian)
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{
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GEN(n, Gen::unsigned_int(NumericLimits<u16>::max()));
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auto memory_stream = make<AllocatingMemoryStream>();
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BigEndianOutputBitStream sut_write { MaybeOwned<Stream>(*memory_stream) };
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BigEndianInputBitStream sut_read { MaybeOwned<Stream>(*memory_stream) };
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MUST(sut_write.write_bits(n, 16));
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auto result = MUST(sut_read.read_bits<u64>(16));
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EXPECT_EQ(result, n);
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}
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RANDOMIZED_TEST_CASE(roundtrip_u32_big_endian)
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{
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GEN(n, Gen::unsigned_int(NumericLimits<u32>::max()));
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auto memory_stream = make<AllocatingMemoryStream>();
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BigEndianOutputBitStream sut_write { MaybeOwned<Stream>(*memory_stream) };
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BigEndianInputBitStream sut_read { MaybeOwned<Stream>(*memory_stream) };
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MUST(sut_write.write_bits(n, 32));
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auto result = MUST(sut_read.read_bits<u64>(32));
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EXPECT_EQ(result, n);
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}
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