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//===- llvm/unittest/Support/CompressionTest.cpp - Compression tests ------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements unit tests for the Compression functions.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/Compression.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Config/config.h"
#include "llvm/Support/MemoryBuffer.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
#if LLVM_ENABLE_ZLIB == 1 && HAVE_LIBZ
void TestZlibCompression(StringRef Input, zlib::CompressionLevel Level) {
OwningPtr<MemoryBuffer> Compressed;
OwningPtr<MemoryBuffer> Uncompressed;
EXPECT_EQ(zlib::StatusOK, zlib::compress(Input, Compressed, Level));
// Check that uncompressed buffer is the same as original.
EXPECT_EQ(zlib::StatusOK, zlib::uncompress(Compressed->getBuffer(),
Uncompressed, Input.size()));
EXPECT_EQ(Input.size(), Uncompressed->getBufferSize());
EXPECT_EQ(0,
memcmp(Input.data(), Uncompressed->getBufferStart(), Input.size()));
if (Input.size() > 0) {
// Uncompression fails if expected length is too short.
EXPECT_EQ(zlib::StatusBufferTooShort,
zlib::uncompress(Compressed->getBuffer(), Uncompressed,
Input.size() - 1));
}
}
TEST(CompressionTest, Zlib) {
TestZlibCompression("", zlib::DefaultCompression);
TestZlibCompression("hello, world!", zlib::NoCompression);
TestZlibCompression("hello, world!", zlib::BestSizeCompression);
TestZlibCompression("hello, world!", zlib::BestSpeedCompression);
TestZlibCompression("hello, world!", zlib::DefaultCompression);
const size_t kSize = 1024;
char BinaryData[kSize];
for (size_t i = 0; i < kSize; ++i) {
BinaryData[i] = i & 255;
}
StringRef BinaryDataStr(BinaryData, kSize);
TestZlibCompression(BinaryDataStr, zlib::NoCompression);
TestZlibCompression(BinaryDataStr, zlib::BestSizeCompression);
TestZlibCompression(BinaryDataStr, zlib::BestSpeedCompression);
TestZlibCompression(BinaryDataStr, zlib::DefaultCompression);
}
TEST(CompressionTest, ZlibCRC32) {
EXPECT_EQ(
0x414FA339U,
zlib::crc32(StringRef("The quick brown fox jumps over the lazy dog")));
}
#endif
}
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