1 //===- llvm/unittest/Support/CompressionTest.cpp - Compression tests ------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file implements unit tests for the Compression functions. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/Support/Compression.h" 14 #include "llvm/ADT/SmallString.h" 15 #include "llvm/ADT/StringRef.h" 16 #include "llvm/Config/config.h" 17 #include "llvm/Support/Error.h" 18 #include "gtest/gtest.h" 19 20 using namespace llvm; 21 22 namespace { 23 24 #if LLVM_ENABLE_ZLIB 25 26 void TestZlibCompression(StringRef Input, int Level) { 27 SmallString<32> Compressed; 28 SmallString<32> Uncompressed; 29 30 Error E = zlib::compress(Input, Compressed, Level); 31 EXPECT_FALSE(E); 32 consumeError(std::move(E)); 33 34 // Check that uncompressed buffer is the same as original. 35 E = zlib::uncompress(Compressed, Uncompressed, Input.size()); 36 EXPECT_FALSE(E); 37 consumeError(std::move(E)); 38 39 EXPECT_EQ(Input, Uncompressed); 40 if (Input.size() > 0) { 41 // Uncompression fails if expected length is too short. 42 E = zlib::uncompress(Compressed, Uncompressed, Input.size() - 1); 43 EXPECT_EQ("zlib error: Z_BUF_ERROR", llvm::toString(std::move(E))); 44 } 45 } 46 47 TEST(CompressionTest, Zlib) { 48 TestZlibCompression("", zlib::DefaultCompression); 49 50 TestZlibCompression("hello, world!", zlib::NoCompression); 51 TestZlibCompression("hello, world!", zlib::BestSizeCompression); 52 TestZlibCompression("hello, world!", zlib::BestSpeedCompression); 53 TestZlibCompression("hello, world!", zlib::DefaultCompression); 54 55 const size_t kSize = 1024; 56 char BinaryData[kSize]; 57 for (size_t i = 0; i < kSize; ++i) { 58 BinaryData[i] = i & 255; 59 } 60 StringRef BinaryDataStr(BinaryData, kSize); 61 62 TestZlibCompression(BinaryDataStr, zlib::NoCompression); 63 TestZlibCompression(BinaryDataStr, zlib::BestSizeCompression); 64 TestZlibCompression(BinaryDataStr, zlib::BestSpeedCompression); 65 TestZlibCompression(BinaryDataStr, zlib::DefaultCompression); 66 } 67 68 TEST(CompressionTest, ZlibCRC32) { 69 EXPECT_EQ( 70 0x414FA339U, 71 zlib::crc32(StringRef("The quick brown fox jumps over the lazy dog"))); 72 } 73 74 #endif 75 76 } 77