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 using namespace llvm::compression; 22 23 namespace { 24 25 #if LLVM_ENABLE_ZLIB 26 static void testZlibCompression(StringRef Input, int Level) { 27 SmallString<32> Compressed; 28 SmallString<32> Uncompressed; 29 zlib::compress(Input, Compressed, Level); 30 31 // Check that uncompressed buffer is the same as original. 32 Error E = zlib::uncompress(Compressed, Uncompressed, Input.size()); 33 consumeError(std::move(E)); 34 35 EXPECT_EQ(Input, Uncompressed); 36 if (Input.size() > 0) { 37 // Uncompression fails if expected length is too short. 38 E = zlib::uncompress(Compressed, Uncompressed, Input.size() - 1); 39 EXPECT_EQ("zlib error: Z_BUF_ERROR", llvm::toString(std::move(E))); 40 } 41 } 42 43 TEST(CompressionTest, Zlib) { 44 testZlibCompression("", zlib::DefaultCompression); 45 46 testZlibCompression("hello, world!", zlib::NoCompression); 47 testZlibCompression("hello, world!", zlib::BestSizeCompression); 48 testZlibCompression("hello, world!", zlib::BestSpeedCompression); 49 testZlibCompression("hello, world!", zlib::DefaultCompression); 50 51 const size_t kSize = 1024; 52 char BinaryData[kSize]; 53 for (size_t i = 0; i < kSize; ++i) 54 BinaryData[i] = i & 255; 55 StringRef BinaryDataStr(BinaryData, kSize); 56 57 testZlibCompression(BinaryDataStr, zlib::NoCompression); 58 testZlibCompression(BinaryDataStr, zlib::BestSizeCompression); 59 testZlibCompression(BinaryDataStr, zlib::BestSpeedCompression); 60 testZlibCompression(BinaryDataStr, zlib::DefaultCompression); 61 } 62 #endif 63 64 } 65