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 20 using namespace llvm; 21 22 namespace { 23 24 #if LLVM_ENABLE_ZLIB == 1 && HAVE_LIBZ 25 26 void 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 41 TEST(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 62 TEST(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
