115 lines · cpp
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-exception6//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/StringExtras.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 20using namespace llvm;21using namespace llvm::compression;22 23namespace {24 25#if LLVM_ENABLE_ZLIB26static void testZlibCompression(StringRef Input, int Level) {27 SmallVector<uint8_t, 0> Compressed;28 SmallVector<uint8_t, 0> Uncompressed;29 zlib::compress(arrayRefFromStringRef(Input), Compressed, Level);30 31 // Check that uncompressed buffer is the same as original.32 Error E = zlib::decompress(Compressed, Uncompressed, Input.size());33 EXPECT_FALSE(std::move(E));34 EXPECT_EQ(Input, toStringRef(Uncompressed));35 36 // decompress with Z dispatches to zlib::decompress.37 E = compression::decompress(DebugCompressionType::Zlib, Compressed,38 Uncompressed, Input.size());39 EXPECT_FALSE(std::move(E));40 EXPECT_EQ(Input, toStringRef(Uncompressed));41 42 if (Input.size() > 0) {43 // Decompression fails if expected length is too short.44 E = zlib::decompress(Compressed, Uncompressed, Input.size() - 1);45 EXPECT_EQ("zlib error: Z_BUF_ERROR", llvm::toString(std::move(E)));46 }47}48 49TEST(CompressionTest, Zlib) {50 testZlibCompression("", zlib::DefaultCompression);51 52 testZlibCompression("hello, world!", zlib::NoCompression);53 testZlibCompression("hello, world!", zlib::BestSizeCompression);54 testZlibCompression("hello, world!", zlib::BestSpeedCompression);55 testZlibCompression("hello, world!", zlib::DefaultCompression);56 57 const size_t kSize = 1024;58 char BinaryData[kSize];59 for (size_t i = 0; i < kSize; ++i)60 BinaryData[i] = i & 255;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#endif69 70#if LLVM_ENABLE_ZSTD71static void testZstdCompression(StringRef Input, int Level) {72 SmallVector<uint8_t, 0> Compressed;73 SmallVector<uint8_t, 0> Uncompressed;74 zstd::compress(arrayRefFromStringRef(Input), Compressed, Level);75 76 // Check that uncompressed buffer is the same as original.77 Error E = zstd::decompress(Compressed, Uncompressed, Input.size());78 EXPECT_FALSE(std::move(E));79 EXPECT_EQ(Input, toStringRef(Uncompressed));80 81 // decompress with Zstd dispatches to zstd::decompress.82 E = compression::decompress(DebugCompressionType::Zstd, Compressed,83 Uncompressed, Input.size());84 EXPECT_FALSE(std::move(E));85 EXPECT_EQ(Input, toStringRef(Uncompressed));86 87 if (Input.size() > 0) {88 // Decompression fails if expected length is too short.89 E = zstd::decompress(Compressed, Uncompressed, Input.size() - 1);90 EXPECT_EQ("Destination buffer is too small", llvm::toString(std::move(E)));91 }92}93 94TEST(CompressionTest, Zstd) {95 testZstdCompression("", zstd::DefaultCompression);96 97 testZstdCompression("hello, world!", zstd::NoCompression);98 testZstdCompression("hello, world!", zstd::BestSizeCompression);99 testZstdCompression("hello, world!", zstd::BestSpeedCompression);100 testZstdCompression("hello, world!", zstd::DefaultCompression);101 102 const size_t kSize = 1024;103 char BinaryData[kSize];104 for (size_t i = 0; i < kSize; ++i)105 BinaryData[i] = i & 255;106 StringRef BinaryDataStr(BinaryData, kSize);107 108 testZstdCompression(BinaryDataStr, zstd::NoCompression);109 testZstdCompression(BinaryDataStr, zstd::BestSizeCompression);110 testZstdCompression(BinaryDataStr, zstd::BestSpeedCompression);111 testZstdCompression(BinaryDataStr, zstd::DefaultCompression);112}113#endif114}115