forked from OSchip/llvm-project
77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
//===- llvm/unittest/Support/CompressionTest.cpp - Compression tests ------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements unit tests for the Compression functions.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Compression.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Config/config.h"
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#include "llvm/Support/Error.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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#if LLVM_ENABLE_ZLIB == 1 && HAVE_LIBZ
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void TestZlibCompression(StringRef Input, int Level) {
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SmallString<32> Compressed;
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SmallString<32> Uncompressed;
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Error E = zlib::compress(Input, Compressed, Level);
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EXPECT_FALSE(E);
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consumeError(std::move(E));
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// Check that uncompressed buffer is the same as original.
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E = zlib::uncompress(Compressed, Uncompressed, Input.size());
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EXPECT_FALSE(E);
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consumeError(std::move(E));
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EXPECT_EQ(Input, Uncompressed);
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if (Input.size() > 0) {
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// Uncompression fails if expected length is too short.
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E = zlib::uncompress(Compressed, Uncompressed, Input.size() - 1);
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EXPECT_EQ("zlib error: Z_BUF_ERROR", llvm::toString(std::move(E)));
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}
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}
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TEST(CompressionTest, Zlib) {
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TestZlibCompression("", zlib::DefaultCompression);
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TestZlibCompression("hello, world!", zlib::NoCompression);
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TestZlibCompression("hello, world!", zlib::BestSizeCompression);
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TestZlibCompression("hello, world!", zlib::BestSpeedCompression);
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TestZlibCompression("hello, world!", zlib::DefaultCompression);
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const size_t kSize = 1024;
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char BinaryData[kSize];
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for (size_t i = 0; i < kSize; ++i) {
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BinaryData[i] = i & 255;
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}
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StringRef BinaryDataStr(BinaryData, kSize);
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TestZlibCompression(BinaryDataStr, zlib::NoCompression);
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TestZlibCompression(BinaryDataStr, zlib::BestSizeCompression);
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TestZlibCompression(BinaryDataStr, zlib::BestSpeedCompression);
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TestZlibCompression(BinaryDataStr, zlib::DefaultCompression);
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}
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TEST(CompressionTest, ZlibCRC32) {
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EXPECT_EQ(
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0x414FA339U,
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zlib::crc32(StringRef("The quick brown fox jumps over the lazy dog")));
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}
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#endif
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}
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