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Adding more realistic test for get sequences

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This commit is contained in:
Bimba Shrestha
2019-09-26 15:38:31 -07:00
parent c04245b257
commit bb27472afc
1 changed files with 41 additions and 22 deletions
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63
tests/fuzzer.c
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@@ -304,6 +304,26 @@ static int FUZ_mallocTests(unsigned seed, double compressibility, unsigned part)
#endif
static void FUZ_decodeSequences(BYTE* dst, ZSTD_Sequence* seqs, size_t seqsSize, BYTE* src, size_t size)
{
size_t i;
for(i = 0; i < seqsSize; ++i) {
assert(dst + seqs[i].litLength + seqs[i].matchLength < dst + size);
assert(src + seqs[i].litLength + seqs[i].matchLength < src + size);
memcpy(dst, src, seqs[i].litLength);
dst += seqs[i].litLength;
src += seqs[i].litLength;
size -= seqs[i].litLength;
memcpy(dst, dst-seqs[i].offset, seqs[i].matchLength);
dst += seqs[i].matchLength;
src += seqs[i].matchLength;
size -= seqs[i].matchLength;
}
memcpy(dst, src, size);
}
/*=============================================
* Unit tests
=============================================*/
@@ -1960,32 +1980,31 @@ static int basicUnitTests(U32 const seed, double compressibility)
DISPLAYLEVEL(3, "OK \n");
}
DISPLAYLEVEL(3, "test%3i : ZSTD_getSequences decode from sequences test : ", testNb++);
{
size_t srcSize = sizeof(U32) * 1000;
BYTE* src = (BYTE*)CNBuffer;
BYTE* decoded = (BYTE*)compressedBuffer;
ZSTD_CCtx* cctx = ZSTD_createCCtx();
size_t zerosLength = ZSTD_BLOCKSIZE_MAX * 2 - 1;
size_t expectedOffsets[] = {1, 1};
size_t expectedLitLengths[] = {2, 1};
size_t expectedMatchLengths[] = {ZSTD_BLOCKSIZE_MAX - 2, ZSTD_BLOCKSIZE_MAX - 2};
size_t expectedReps[] = {1, 1};
size_t expectedMatchPos[] = {2, 1};
size_t expectedSequencesSize = 2;
size_t sequencesSize;
size_t i = 0;
ZSTD_Sequence* sequences = (ZSTD_Sequence*)compressedBuffer;
DISPLAYLEVEL(3, "test%3i : ZSTD_getSequences zeros : ", testNb++);
ZSTD_Sequence* seqs = malloc(srcSize * sizeof(ZSTD_Sequence));
size_t seqsSize; size_t i;
U32 randSeed = seed;
assert(cctx != NULL);
memset(CNBuffer, 0, zerosLength);
sequencesSize = ZSTD_getSequences(cctx, sequences, 10,
CNBuffer, zerosLength);
assert(sequencesSize == expectedSequencesSize);
for (i = 0; i < sequencesSize; ++i) {
assert(sequences[i].offset == expectedOffsets[i]);
assert(sequences[i].litLength == expectedLitLengths[i]);
assert(sequences[i].matchLength == expectedMatchLengths[i]);
assert(sequences[i].rep == expectedReps[i]);
assert(sequences[i].matchPos == expectedMatchPos[i]);
}
/* Populate src with random data */
for (i = 0; i < srcSize / sizeof(U32); ++i) {*((U32*)src + i) = FUZ_rand(&randSeed);}
/* get the sequences */
seqsSize = ZSTD_getSequences(cctx, seqs, srcSize, src, srcSize);
/* "decode" and compare the sequences */
FUZ_decodeSequences(decoded, seqs, seqsSize, src, srcSize);
assert(!memcmp(CNBuffer, compressedBuffer, 5));
ZSTD_freeCCtx(cctx);
free(seqs);
}
/* Multiple blocks of zeros test */