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 "llvm/Support/Error.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 SmallString<32> Compressed; 29 SmallString<32> Uncompressed; 30 31 Error E = zlib::compress(Input, Compressed, Level); 32 EXPECT_FALSE(E); 33 consumeError(std::move(E)); 34 35 // Check that uncompressed buffer is the same as original. 36 E = zlib::uncompress(Compressed, Uncompressed, Input.size()); 37 EXPECT_FALSE(E); 38 consumeError(std::move(E)); 39 40 EXPECT_EQ(Input, Uncompressed); 41 if (Input.size() > 0) { 42 // Uncompression fails if expected length is too short. 43 E = zlib::uncompress(Compressed, Uncompressed, Input.size() - 1); 44 EXPECT_EQ("zlib error: Z_BUF_ERROR", llvm::toString(std::move(E))); 45 } 46 } 47 48 TEST(CompressionTest, Zlib) { 49 TestZlibCompression("", zlib::DefaultCompression); 50 51 TestZlibCompression("hello, world!", zlib::NoCompression); 52 TestZlibCompression("hello, world!", zlib::BestSizeCompression); 53 TestZlibCompression("hello, world!", zlib::BestSpeedCompression); 54 TestZlibCompression("hello, world!", zlib::DefaultCompression); 55 56 const size_t kSize = 1024; 57 char BinaryData[kSize]; 58 for (size_t i = 0; i < kSize; ++i) { 59 BinaryData[i] = i & 255; 60 } 61 StringRef BinaryDataStr(BinaryData, kSize); 62 63 TestZlibCompression(BinaryDataStr, zlib::NoCompression); 64 TestZlibCompression(BinaryDataStr, zlib::BestSizeCompression); 65 TestZlibCompression(BinaryDataStr, zlib::BestSpeedCompression); 66 TestZlibCompression(BinaryDataStr, zlib::DefaultCompression); 67 } 68 69 TEST(CompressionTest, ZlibCRC32) { 70 EXPECT_EQ( 71 0x414FA339U, 72 zlib::crc32(StringRef("The quick brown fox jumps over the lazy dog"))); 73 } 74 75 #endif 76 77 } 78