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75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
//===- llvm/unittest/Support/CompressionTest.cpp - Compression tests ------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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/OwningPtr.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/MemoryBuffer.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, zlib::CompressionLevel Level) {
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OwningPtr<MemoryBuffer> Compressed;
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OwningPtr<MemoryBuffer> Uncompressed;
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EXPECT_EQ(zlib::StatusOK, zlib::compress(Input, Compressed, Level));
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// Check that uncompressed buffer is the same as original.
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EXPECT_EQ(zlib::StatusOK, zlib::uncompress(Compressed->getBuffer(),
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Uncompressed, Input.size()));
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EXPECT_EQ(Input.size(), Uncompressed->getBufferSize());
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EXPECT_EQ(0,
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memcmp(Input.data(), Uncompressed->getBufferStart(), Input.size()));
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if (Input.size() > 0) {
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// Uncompression fails if expected length is too short.
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EXPECT_EQ(zlib::StatusBufferTooShort,
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zlib::uncompress(Compressed->getBuffer(), Uncompressed,
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Input.size() - 1));
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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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