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Tests: Add MicroLZMA test.
This commit is contained in:
Jia Tan
parent
adaacafde6
commit
39f4a1a86a
2 changed files with 551 additions and 1 deletions
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@ -42,7 +42,8 @@ check_PROGRAMS = \
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test_bcj_exact_size \
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test_memlimit \
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test_lzip_decoder \
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test_vli
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test_vli \
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test_microlzma
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TESTS = \
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test_check \
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@ -57,6 +58,7 @@ TESTS = \
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test_memlimit \
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test_lzip_decoder \
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test_vli \
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test_microlzma \
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test_files.sh \
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test_suffix.sh \
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test_compress_prepared_bcj_sparc \
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548
tests/test_microlzma.c
Normal file
548
tests/test_microlzma.c
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@ -0,0 +1,548 @@
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///////////////////////////////////////////////////////////////////////////////
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//
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/// \file test_microlzma.c
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/// \brief Tests MicroLZMA encoding and decoding
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//
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// Author: Jia Tan
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//
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// This file has been put into the public domain.
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// You can do whatever you want with this file.
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "tests.h"
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#ifdef HAVE_MICROLZMA
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#define BUFFER_SIZE 1024
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#ifdef HAVE_ENCODER_LZMA1
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// MicroLZMA encoded "Hello\nWorld\n" output size in bytes.
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#define ENCODED_OUTPUT_SIZE 17
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// Byte array of "Hello\nWorld\n". This is used for various encoder tests.
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static const uint8_t hello_world[] = { 0x48, 0x65, 0x6C, 0x6C, 0x6F, 0x0A,
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0x57, 0x6F, 0x72, 0x6C, 0x64, 0x0A };
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// This is the CRC32 value of the MicroLZMA encoding of "Hello\nWorld\n".
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// The settings used were based on LZMA_PRESET_DEFAULT as of liblzma 5.6.0.
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// This assumes MicroLZMA is correct in liblzma 5.6.0, which is safe
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// considering the encoded "Hello\nWorld\n" can successfully be decoded at
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// this time. This is to test for regressions that cause MicroLZMA output
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// to change.
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static const uint32_t hello_world_encoded_crc = 0x3CDE40A8;
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// Function implementation borrowed from lzma_decoder.c. It is needed to
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// ensure the first byte of a MicroLZMA stream is set correctly with the
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// negation of the LZMA properties.
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static bool
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lzma_lzma_lclppb_decode(lzma_options_lzma *options, uint8_t byte)
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{
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if (byte > (4 * 5 + 4) * 9 + 8)
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return true;
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// See the file format specification to understand this.
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options->pb = byte / (9 * 5);
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byte -= options->pb * 9 * 5;
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options->lp = byte / 9;
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options->lc = byte - options->lp * 9;
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return options->lc + options->lp > LZMA_LCLP_MAX;
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}
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///////////////////
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// Encoder tests //
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///////////////////
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// This tests a few of the basic options. These options are not unique to
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// MicroLZMA in any way, its mostly ensuring that the options are actually
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// being checked before initializing the decoder internals.
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static void
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test_encode_options(void)
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{
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lzma_stream strm = LZMA_STREAM_INIT;
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lzma_options_lzma opt_lzma;
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// Initialize with default options.
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assert_false(lzma_lzma_preset(&opt_lzma, LZMA_PRESET_DEFAULT));
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// NULL stream
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assert_lzma_ret(lzma_microlzma_encoder(NULL, &opt_lzma),
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LZMA_PROG_ERROR);
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// lc/lp/pb = 5/0/2 (lc invalid)
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opt_lzma.lc = 5;
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opt_lzma.lp = 0;
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opt_lzma.pb = 2;
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assert_lzma_ret(lzma_microlzma_encoder(&strm, &opt_lzma),
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LZMA_OPTIONS_ERROR);
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// lc/lp/pb = 0/5/2 (lp invalid)
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opt_lzma.lc = 0;
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opt_lzma.lp = 5;
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opt_lzma.pb = 2;
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assert_lzma_ret(lzma_microlzma_encoder(&strm, &opt_lzma),
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LZMA_OPTIONS_ERROR);
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// lc/lp/pb = 3/2/2 (lc + lp invalid)
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opt_lzma.lc = 3;
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opt_lzma.lp = 2;
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opt_lzma.pb = 2;
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assert_lzma_ret(lzma_microlzma_encoder(&strm, &opt_lzma),
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LZMA_OPTIONS_ERROR);
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// lc/lp/pb = 3/0/5 (pb invalid)
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opt_lzma.lc = 3;
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opt_lzma.lp = 0;
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opt_lzma.pb = 5;
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assert_lzma_ret(lzma_microlzma_encoder(&strm, &opt_lzma),
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LZMA_OPTIONS_ERROR);
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// Zero out lp, pb, lc options to not interfere with later tests.
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opt_lzma.lp = 0;
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opt_lzma.pb = 0;
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opt_lzma.lc = 0;
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// Set invalid dictionary size.
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opt_lzma.dict_size = LZMA_DICT_SIZE_MIN - 1;
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assert_lzma_ret(lzma_microlzma_encoder(&strm, &opt_lzma),
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LZMA_OPTIONS_ERROR);
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// Maximum dictionary size for the encoder, as described in lzma12.h
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// is 1.5 GiB.
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opt_lzma.dict_size = (UINT32_C(1) << 30) + (UINT32_C(1) << 29) + 1;
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assert_lzma_ret(lzma_microlzma_encoder(&strm, &opt_lzma),
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LZMA_OPTIONS_ERROR);
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lzma_end(&strm);
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}
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static void
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test_encode_basic(void)
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{
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lzma_stream strm = LZMA_STREAM_INIT;
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lzma_options_lzma opt_lzma;
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assert_false(lzma_lzma_preset(&opt_lzma, LZMA_PRESET_DEFAULT));
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// Initialize the encoder using the default options.
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assert_lzma_ret(lzma_microlzma_encoder(&strm, &opt_lzma), LZMA_OK);
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uint8_t output[BUFFER_SIZE];
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strm.next_in = hello_world;
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strm.avail_in = ARRAY_SIZE(hello_world);
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strm.next_out = output;
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strm.avail_out = BUFFER_SIZE;
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// Everything must be encoded in one lzma_code() call.
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assert_lzma_ret(lzma_code(&strm, LZMA_FINISH), LZMA_STREAM_END);
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// Check entire input was consumed.
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assert_uint_eq(strm.total_in, ARRAY_SIZE(hello_world));
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// Check that the first byte in the output stream is not 0x0.
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// In regular .lzma, the first byte is always 0x0. Instead, a
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// feature of MicroLZMA is the first byte is the bitwise-negation
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// of the LZMA properties.
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assert_uint(output[0], !=, 0x0);
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uint8_t props = ~output[0];
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lzma_options_lzma test_options;
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assert_false(lzma_lzma_lclppb_decode(&test_options, props));
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assert_uint_eq(opt_lzma.lc, test_options.lc);
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assert_uint_eq(opt_lzma.lp, test_options.lp);
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assert_uint_eq(opt_lzma.pb, test_options.pb);
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// Compute the check over the output data. This is compared to
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// the expected check value.
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uint32_t check_val = lzma_crc32(output, strm.total_out, 0);
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assert_uint_eq(check_val, hello_world_encoded_crc);
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lzma_end(&strm);
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}
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// This tests the behavior when strm.avail_out is so small it cannot hold
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// the header plus 1 encoded byte (< 6).
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static void
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test_encode_small_out(void)
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{
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lzma_stream strm = LZMA_STREAM_INIT;
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lzma_options_lzma opt_lzma;
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assert_false(lzma_lzma_preset(&opt_lzma, LZMA_PRESET_DEFAULT));
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assert_lzma_ret(lzma_microlzma_encoder(&strm, &opt_lzma), LZMA_OK);
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uint8_t output[BUFFER_SIZE];
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strm.next_in = hello_world;
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strm.avail_in = ARRAY_SIZE(hello_world);
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strm.next_out = output;
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strm.avail_out = 5;
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// LZMA_PROG_ERROR is expected when strm.avail_out < 6
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assert_lzma_ret(lzma_code(&strm, LZMA_FINISH), LZMA_PROG_ERROR);
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// The encoder must be reset because coders cannot be used again
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// after returning LZMA_PROG_ERROR.
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assert_lzma_ret(lzma_microlzma_encoder(&strm, &opt_lzma), LZMA_OK);
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// Reset strm.avail_out to be > 6, but not enough to hold all of the
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// compressed data.
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strm.avail_out = ENCODED_OUTPUT_SIZE - 1;
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// Encoding should not return an error now.
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assert_lzma_ret(lzma_code(&strm, LZMA_FINISH), LZMA_STREAM_END);
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assert_uint(strm.total_in, <, ARRAY_SIZE(hello_world));
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lzma_end(&strm);
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}
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// LZMA_FINISH is the only supported action. All others must
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// return LZMA_PROG_ERROR.
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static void
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test_encode_actions(void)
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{
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lzma_stream strm = LZMA_STREAM_INIT;
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lzma_options_lzma opt_lzma;
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assert_false(lzma_lzma_preset(&opt_lzma, LZMA_PRESET_DEFAULT));
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lzma_action actions[] = { LZMA_RUN, LZMA_SYNC_FLUSH,
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LZMA_FULL_FLUSH, LZMA_FULL_BARRIER };
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for (uint32_t i = 0; i < ARRAY_SIZE(actions); i++) {
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assert_lzma_ret(lzma_microlzma_encoder(&strm, &opt_lzma),
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LZMA_OK);
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uint8_t output[BUFFER_SIZE];
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strm.next_in = hello_world;
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strm.avail_in = ARRAY_SIZE(hello_world);
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strm.next_out = output;
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strm.avail_out = BUFFER_SIZE;
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assert_lzma_ret(lzma_code(&strm, actions[i]),
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LZMA_PROG_ERROR);
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}
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lzma_end(&strm);
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}
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#endif
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///////////////////
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// Decoder tests //
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///////////////////
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#if defined(HAVE_DECODER_LZMA1) && defined(HAVE_ENCODER_LZMA1)
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// Byte array of "Goodbye World!". This is used for various decoder tests.
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static const uint8_t goodbye_world[] = { 0x47, 0x6f, 0x6f, 0x64, 0x62,
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0x79, 0x65, 0x20, 0x57, 0x6f, 0x72, 0x6c, 0x64, 0x21 };
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static uint8_t *goodbye_world_encoded = NULL;
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static uint32_t goodbye_world_encoded_size = 0;
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// Helper function to encode data and return the compressed size.
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static uint32_t
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basic_microlzma_encode(const uint8_t *input, uint32_t in_size,
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uint8_t **compressed)
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{
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lzma_stream strm = LZMA_STREAM_INIT;
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lzma_options_lzma opt_lzma;
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// Lazy way to set the output size since the input should never
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// inflate by much in these simple test cases. This is tested to
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// be large enough after encoding to fit the entire input, so if
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// this assumption does not hold then this will fail.
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const uint32_t out_size = in_size << 1;
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*compressed = tuktest_malloc(out_size);
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// Always encode with the default options for simplicity.
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if (lzma_lzma_preset(&opt_lzma, LZMA_PRESET_DEFAULT))
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goto decoder_setup_error;
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if (lzma_microlzma_encoder(&strm, &opt_lzma) != LZMA_OK)
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goto decoder_setup_error;
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strm.next_in = input;
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strm.avail_in = in_size;
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strm.next_out = *compressed;
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strm.avail_out = out_size;
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if (lzma_code(&strm, LZMA_FINISH) != LZMA_STREAM_END)
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goto decoder_setup_error;
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// Check the entire input was consumed and fit into the output buffer.
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if (strm.total_in != in_size)
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goto decoder_setup_error;
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const uint64_t encoded_count = strm.total_out;
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lzma_end(&strm);
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return encoded_count;
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decoder_setup_error:
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tuktest_error("Failed to initialize decoder tests");
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return 0;
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}
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static void
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test_decode_options(void)
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{
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// NULL stream
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assert_lzma_ret(lzma_microlzma_decoder(NULL, BUFFER_SIZE,
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ARRAY_SIZE(hello_world), true,
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LZMA_DICT_SIZE_DEFAULT), LZMA_PROG_ERROR);
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// Uncompressed size larger than max
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lzma_stream strm = LZMA_STREAM_INIT;
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assert_lzma_ret(lzma_microlzma_decoder(&strm, BUFFER_SIZE,
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LZMA_VLI_MAX + 1, true, LZMA_DICT_SIZE_DEFAULT),
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LZMA_OPTIONS_ERROR);
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}
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// Test decoding succeeds when uncomp_size is correct regardless of
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// the value of uncomp_size_is_exact.
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static void
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test_decode_uncomp_size_is_exact(void)
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{
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lzma_stream strm = LZMA_STREAM_INIT;
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assert_lzma_ret(lzma_microlzma_decoder(&strm,
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goodbye_world_encoded_size,
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ARRAY_SIZE(goodbye_world), true,
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LZMA_DICT_SIZE_DEFAULT), LZMA_OK);
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uint8_t output[BUFFER_SIZE];
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strm.next_in = goodbye_world_encoded;
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strm.next_out = output;
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strm.avail_out = BUFFER_SIZE;
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strm.avail_in = goodbye_world_encoded_size;
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assert_lzma_ret(lzma_code(&strm, LZMA_RUN), LZMA_STREAM_END);
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assert_uint_eq(strm.total_in, goodbye_world_encoded_size);
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assert_uint_eq(strm.total_out, ARRAY_SIZE(goodbye_world));
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assert_array_eq(goodbye_world, output, strm.total_out);
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// Reset decoder with uncomp_size_is_exact set to false and
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// uncomp_size set to correct value. Also test using the
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// uncompressed size as the dictionary size.
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assert_lzma_ret(lzma_microlzma_decoder(&strm,
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goodbye_world_encoded_size,
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ARRAY_SIZE(goodbye_world), false,
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ARRAY_SIZE(goodbye_world)), LZMA_OK);
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strm.next_in = goodbye_world_encoded;
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strm.next_out = output;
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strm.avail_out = BUFFER_SIZE;
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strm.avail_in = goodbye_world_encoded_size;
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assert_lzma_ret(lzma_code(&strm, LZMA_RUN), LZMA_STREAM_END);
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assert_uint_eq(strm.total_in, goodbye_world_encoded_size);
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assert_uint_eq(strm.total_out, ARRAY_SIZE(goodbye_world));
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assert_array_eq(goodbye_world, output, strm.total_out);
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lzma_end(&strm);
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}
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// This tests decoding when MicroLZMA decoder is called with
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// an incorrect uncompressed size.
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static void
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test_decode_uncomp_size_wrong(void)
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{
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lzma_stream strm = LZMA_STREAM_INIT;
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assert_lzma_ret(lzma_microlzma_decoder(&strm,
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goodbye_world_encoded_size,
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ARRAY_SIZE(goodbye_world) + 1, false,
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LZMA_DICT_SIZE_DEFAULT), LZMA_OK);
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uint8_t output[BUFFER_SIZE];
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strm.next_in = goodbye_world_encoded;
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strm.next_out = output;
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strm.avail_out = BUFFER_SIZE;
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strm.avail_in = goodbye_world_encoded_size;
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// LZMA_OK should be returned because the input size given was
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// larger than the actual encoded size. The decoder is expecting
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// more input to possibly fill the uncompressed size that was set.
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assert_lzma_ret(lzma_code(&strm, LZMA_FINISH), LZMA_OK);
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assert_uint_eq(strm.total_out, ARRAY_SIZE(goodbye_world));
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assert_array_eq(goodbye_world, output, strm.total_out);
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// Next, test with uncomp_size_is_exact set.
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assert_lzma_ret(lzma_microlzma_decoder(&strm,
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goodbye_world_encoded_size,
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ARRAY_SIZE(goodbye_world) + 1, true,
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LZMA_DICT_SIZE_DEFAULT), LZMA_OK);
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strm.next_in = goodbye_world_encoded;
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strm.next_out = output;
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strm.avail_out = BUFFER_SIZE;
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strm.avail_in = goodbye_world_encoded_size;
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// No error detected, even though all input was consumed and there
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// is more room in the output buffer.
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assert_lzma_ret(lzma_code(&strm, LZMA_FINISH), LZMA_OK);
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assert_uint_eq(strm.total_out, ARRAY_SIZE(goodbye_world));
|
||||
assert_array_eq(goodbye_world, output, strm.total_out);
|
||||
|
||||
// Reset stream with uncomp_size smaller than the real
|
||||
// uncompressed size.
|
||||
assert_lzma_ret(lzma_microlzma_decoder(&strm,
|
||||
goodbye_world_encoded_size,
|
||||
ARRAY_SIZE(hello_world) - 1, true,
|
||||
LZMA_DICT_SIZE_DEFAULT), LZMA_OK);
|
||||
|
||||
strm.next_in = goodbye_world_encoded;
|
||||
strm.next_out = output;
|
||||
strm.avail_out = BUFFER_SIZE;
|
||||
strm.avail_in = goodbye_world_encoded_size;
|
||||
|
||||
// This case actually results in an error since it decodes the full
|
||||
// uncompressed size but the range coder is not in the proper state
|
||||
// for the stream to end.
|
||||
assert_lzma_ret(lzma_code(&strm, LZMA_RUN), LZMA_DATA_ERROR);
|
||||
|
||||
lzma_end(&strm);
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
test_decode_comp_size_wrong(void)
|
||||
{
|
||||
lzma_stream strm = LZMA_STREAM_INIT;
|
||||
assert_lzma_ret(lzma_microlzma_decoder(&strm,
|
||||
goodbye_world_encoded_size + 1,
|
||||
ARRAY_SIZE(goodbye_world), true,
|
||||
LZMA_DICT_SIZE_DEFAULT), LZMA_OK);
|
||||
|
||||
uint8_t output[BUFFER_SIZE];
|
||||
|
||||
strm.next_in = goodbye_world_encoded;
|
||||
strm.next_out = output;
|
||||
strm.avail_out = BUFFER_SIZE;
|
||||
strm.avail_in = goodbye_world_encoded_size;
|
||||
|
||||
// When uncomp_size_is_exact is set, the compressed size must be
|
||||
// correct or else LZMA_DATA_ERROR is returned.
|
||||
assert_lzma_ret(lzma_code(&strm, LZMA_FINISH), LZMA_DATA_ERROR);
|
||||
|
||||
assert_lzma_ret(lzma_microlzma_decoder(&strm,
|
||||
goodbye_world_encoded_size + 1,
|
||||
ARRAY_SIZE(goodbye_world), false,
|
||||
LZMA_DICT_SIZE_DEFAULT), LZMA_OK);
|
||||
|
||||
strm.next_in = goodbye_world_encoded;
|
||||
strm.next_out = output;
|
||||
strm.avail_out = BUFFER_SIZE;
|
||||
strm.avail_in = goodbye_world_encoded_size;
|
||||
|
||||
// When uncomp_size_is_exact is not set, the decoder does not
|
||||
// detect when the compressed size is wrong as long as all of the
|
||||
// expected output has been decoded.
|
||||
assert_lzma_ret(lzma_code(&strm, LZMA_FINISH), LZMA_STREAM_END);
|
||||
|
||||
lzma_end(&strm);
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
test_decode_bad_lzma_properties(void)
|
||||
{
|
||||
// Alter first byte to encode invalid LZMA properties.
|
||||
uint8_t *compressed = tuktest_malloc(goodbye_world_encoded_size);
|
||||
memcpy(compressed, goodbye_world_encoded, goodbye_world_encoded_size);
|
||||
|
||||
// lc=3, lp=2, pb=2
|
||||
compressed[0] = (uint8_t)~0x6FU;
|
||||
|
||||
lzma_stream strm = LZMA_STREAM_INIT;
|
||||
assert_lzma_ret(lzma_microlzma_decoder(&strm,
|
||||
goodbye_world_encoded_size,
|
||||
ARRAY_SIZE(goodbye_world), false,
|
||||
LZMA_DICT_SIZE_DEFAULT), LZMA_OK);
|
||||
|
||||
uint8_t output[BUFFER_SIZE];
|
||||
|
||||
strm.next_in = compressed;
|
||||
strm.next_out = output;
|
||||
strm.avail_out = BUFFER_SIZE;
|
||||
strm.avail_in = goodbye_world_encoded_size;
|
||||
|
||||
assert_lzma_ret(lzma_code(&strm, LZMA_RUN), LZMA_OPTIONS_ERROR);
|
||||
|
||||
// Use valid, but incorrect LZMA properties.
|
||||
// lc=3, lp=1, pb=2
|
||||
compressed[0] = (uint8_t)~0x66;
|
||||
|
||||
assert_lzma_ret(lzma_microlzma_decoder(&strm,
|
||||
goodbye_world_encoded_size,
|
||||
ARRAY_SIZE(goodbye_world), true,
|
||||
LZMA_DICT_SIZE_DEFAULT), LZMA_OK);
|
||||
|
||||
strm.next_in = compressed;
|
||||
strm.next_out = output;
|
||||
strm.avail_out = BUFFER_SIZE;
|
||||
strm.avail_in = goodbye_world_encoded_size;
|
||||
|
||||
assert_lzma_ret(lzma_code(&strm, LZMA_RUN), LZMA_DATA_ERROR);
|
||||
|
||||
lzma_end(&strm);
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
||||
|
||||
extern int
|
||||
main(int argc, char **argv)
|
||||
{
|
||||
tuktest_start(argc, argv);
|
||||
|
||||
#ifndef HAVE_MICROLZMA
|
||||
tuktest_early_skip("MicroLZMA disabled");
|
||||
#else
|
||||
# ifdef HAVE_ENCODER_LZMA1
|
||||
tuktest_run(test_encode_options);
|
||||
tuktest_run(test_encode_basic);
|
||||
tuktest_run(test_encode_small_out);
|
||||
tuktest_run(test_encode_actions);
|
||||
# endif
|
||||
|
||||
# if defined(HAVE_DECODER_LZMA1) && defined(HAVE_ENCODER_LZMA1)
|
||||
goodbye_world_encoded_size = basic_microlzma_encode(goodbye_world,
|
||||
ARRAY_SIZE(goodbye_world), &goodbye_world_encoded);
|
||||
|
||||
tuktest_run(test_decode_options);
|
||||
tuktest_run(test_decode_uncomp_size_is_exact);
|
||||
tuktest_run(test_decode_uncomp_size_wrong);
|
||||
tuktest_run(test_decode_comp_size_wrong);
|
||||
tuktest_run(test_decode_bad_lzma_properties);
|
||||
# endif
|
||||
|
||||
return tuktest_end();
|
||||
#endif
|
||||
}
|
||||
Loading…
Reference in a new issue