//===- llvm/unittest/Support/CompressionTest.cpp - Compression tests ------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file implements unit tests for the Compression functions. // //===----------------------------------------------------------------------===// #include "llvm/Support/Compression.h" #include "llvm/ADT/SmallString.h" #include "llvm/ADT/StringRef.h" #include "llvm/Config/config.h" #include "llvm/Support/Error.h" #include "gtest/gtest.h" using namespace llvm; namespace { #if LLVM_ENABLE_ZLIB == 1 && HAVE_LIBZ void TestZlibCompression(StringRef Input, zlib::CompressionLevel Level) { SmallString<32> Compressed; SmallString<32> Uncompressed; Error E = zlib::compress(Input, Compressed, Level); EXPECT_FALSE(E); consumeError(std::move(E)); // Check that uncompressed buffer is the same as original. E = zlib::uncompress(Compressed, Uncompressed, Input.size()); EXPECT_FALSE(E); consumeError(std::move(E)); EXPECT_EQ(Input, Uncompressed); if (Input.size() > 0) { // Uncompression fails if expected length is too short. E = zlib::uncompress(Compressed, Uncompressed, Input.size() - 1); EXPECT_EQ("zlib error: Z_BUF_ERROR", llvm::toString(std::move(E))); } } TEST(CompressionTest, Zlib) { TestZlibCompression("", zlib::DefaultCompression); TestZlibCompression("hello, world!", zlib::NoCompression); TestZlibCompression("hello, world!", zlib::BestSizeCompression); TestZlibCompression("hello, world!", zlib::BestSpeedCompression); TestZlibCompression("hello, world!", zlib::DefaultCompression); const size_t kSize = 1024; char BinaryData[kSize]; for (size_t i = 0; i < kSize; ++i) { BinaryData[i] = i & 255; } StringRef BinaryDataStr(BinaryData, kSize); TestZlibCompression(BinaryDataStr, zlib::NoCompression); TestZlibCompression(BinaryDataStr, zlib::BestSizeCompression); TestZlibCompression(BinaryDataStr, zlib::BestSpeedCompression); TestZlibCompression(BinaryDataStr, zlib::DefaultCompression); } TEST(CompressionTest, ZlibCRC32) { EXPECT_EQ( 0x414FA339U, zlib::crc32(StringRef("The quick brown fox jumps over the lazy dog"))); } #endif }