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/OwningPtr.h" 16 #include "llvm/ADT/StringRef.h" 17 #include "llvm/Config/config.h" 18 #include "llvm/Support/MemoryBuffer.h" 19 #include "gtest/gtest.h" 20 21 using namespace llvm; 22 23 namespace { 24 25 #if LLVM_ENABLE_ZLIB == 1 && HAVE_LIBZ 26 27 void TestZlibCompression(StringRef Input, zlib::CompressionLevel Level) { 28 OwningPtr<MemoryBuffer> Compressed; 29 OwningPtr<MemoryBuffer> Uncompressed; 30 EXPECT_EQ(zlib::StatusOK, zlib::compress(Input, Compressed, Level)); 31 // Check that uncompressed buffer is the same as original. 32 EXPECT_EQ(zlib::StatusOK, zlib::uncompress(Compressed->getBuffer(), 33 Uncompressed, Input.size())); 34 EXPECT_EQ(Input.size(), Uncompressed->getBufferSize()); 35 EXPECT_EQ(0, 36 memcmp(Input.data(), Uncompressed->getBufferStart(), Input.size())); 37 if (Input.size() > 0) { 38 // Uncompression fails if expected length is too short. 39 EXPECT_EQ(zlib::StatusBufferTooShort, 40 zlib::uncompress(Compressed->getBuffer(), Uncompressed, 41 Input.size() - 1)); 42 } 43 } 44 45 TEST(CompressionTest, Zlib) { 46 TestZlibCompression("", zlib::DefaultCompression); 47 48 TestZlibCompression("hello, world!", zlib::NoCompression); 49 TestZlibCompression("hello, world!", zlib::BestSizeCompression); 50 TestZlibCompression("hello, world!", zlib::BestSpeedCompression); 51 TestZlibCompression("hello, world!", zlib::DefaultCompression); 52 53 const size_t kSize = 1024; 54 char BinaryData[kSize]; 55 for (size_t i = 0; i < kSize; ++i) { 56 BinaryData[i] = i & 255; 57 } 58 StringRef BinaryDataStr(BinaryData, kSize); 59 60 TestZlibCompression(BinaryDataStr, zlib::NoCompression); 61 TestZlibCompression(BinaryDataStr, zlib::BestSizeCompression); 62 TestZlibCompression(BinaryDataStr, zlib::BestSpeedCompression); 63 TestZlibCompression(BinaryDataStr, zlib::DefaultCompression); 64 } 65 66 #endif 67 68 } 69
