1//===- llvm/unittest/Support/CompressionTest.cpp - Compression tests ------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements unit tests for the Compression functions. 11// 12//===----------------------------------------------------------------------===// 13 14#include "llvm/Support/Compression.h" 15#include "llvm/ADT/SmallString.h" 16#include "llvm/ADT/StringRef.h" 17#include "llvm/Config/config.h" 18#include "gtest/gtest.h" 19 20using namespace llvm; 21 22namespace { 23 24#if LLVM_ENABLE_ZLIB == 1 && HAVE_LIBZ 25 26void TestZlibCompression(StringRef Input, zlib::CompressionLevel Level) { 27 SmallString<32> Compressed; 28 SmallString<32> 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, 32 zlib::uncompress(Compressed, Uncompressed, Input.size())); 33 EXPECT_EQ(Input, Uncompressed); 34 if (Input.size() > 0) { 35 // Uncompression fails if expected length is too short. 36 EXPECT_EQ(zlib::StatusBufferTooShort, 37 zlib::uncompress(Compressed, Uncompressed, Input.size() - 1)); 38 } 39} 40 41TEST(CompressionTest, Zlib) { 42 TestZlibCompression("", zlib::DefaultCompression); 43 44 TestZlibCompression("hello, world!", zlib::NoCompression); 45 TestZlibCompression("hello, world!", zlib::BestSizeCompression); 46 TestZlibCompression("hello, world!", zlib::BestSpeedCompression); 47 TestZlibCompression("hello, world!", zlib::DefaultCompression); 48 49 const size_t kSize = 1024; 50 char BinaryData[kSize]; 51 for (size_t i = 0; i < kSize; ++i) { 52 BinaryData[i] = i & 255; 53 } 54 StringRef BinaryDataStr(BinaryData, kSize); 55 56 TestZlibCompression(BinaryDataStr, zlib::NoCompression); 57 TestZlibCompression(BinaryDataStr, zlib::BestSizeCompression); 58 TestZlibCompression(BinaryDataStr, zlib::BestSpeedCompression); 59 TestZlibCompression(BinaryDataStr, zlib::DefaultCompression); 60} 61 62TEST(CompressionTest, ZlibCRC32) { 63 EXPECT_EQ( 64 0x414FA339U, 65 zlib::crc32(StringRef("The quick brown fox jumps over the lazy dog"))); 66} 67 68#endif 69 70} 71