1 //===- llvm/unittest/Support/CompressionTest.cpp - Compression tests ------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements unit tests for the Compression functions.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/Support/Compression.h"
15 #include "llvm/ADT/StringRef.h"
16 #include "llvm/Config/config.h"
17 #include "llvm/Support/MemoryBuffer.h"
18 #include "gtest/gtest.h"
24 #if LLVM_ENABLE_ZLIB == 1 && HAVE_LIBZ
26 void TestZlibCompression(StringRef Input, zlib::CompressionLevel Level) {
27 std::unique_ptr<MemoryBuffer> Compressed;
28 std::unique_ptr<MemoryBuffer> Uncompressed;
29 EXPECT_EQ(zlib::StatusOK, zlib::compress(Input, Compressed, Level));
30 // Check that uncompressed buffer is the same as original.
31 EXPECT_EQ(zlib::StatusOK, zlib::uncompress(Compressed->getBuffer(),
32 Uncompressed, Input.size()));
33 EXPECT_EQ(Input.size(), Uncompressed->getBufferSize());
35 memcmp(Input.data(), Uncompressed->getBufferStart(), Input.size()));
36 if (Input.size() > 0) {
37 // Uncompression fails if expected length is too short.
38 EXPECT_EQ(zlib::StatusBufferTooShort,
39 zlib::uncompress(Compressed->getBuffer(), Uncompressed,
44 TEST(CompressionTest, Zlib) {
45 TestZlibCompression("", zlib::DefaultCompression);
47 TestZlibCompression("hello, world!", zlib::NoCompression);
48 TestZlibCompression("hello, world!", zlib::BestSizeCompression);
49 TestZlibCompression("hello, world!", zlib::BestSpeedCompression);
50 TestZlibCompression("hello, world!", zlib::DefaultCompression);
52 const size_t kSize = 1024;
53 char BinaryData[kSize];
54 for (size_t i = 0; i < kSize; ++i) {
55 BinaryData[i] = i & 255;
57 StringRef BinaryDataStr(BinaryData, kSize);
59 TestZlibCompression(BinaryDataStr, zlib::NoCompression);
60 TestZlibCompression(BinaryDataStr, zlib::BestSizeCompression);
61 TestZlibCompression(BinaryDataStr, zlib::BestSpeedCompression);
62 TestZlibCompression(BinaryDataStr, zlib::DefaultCompression);
65 TEST(CompressionTest, ZlibCRC32) {
68 zlib::crc32(StringRef("The quick brown fox jumps over the lazy dog")));