| //===- llvm/unittest/Support/CompressionTest.cpp - Compression tests ------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements unit tests for the Compression functions. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Support/Compression.h" |
| #include "llvm/ADT/OwningPtr.h" |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/Config/config.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "gtest/gtest.h" |
| |
| using namespace llvm; |
| |
| namespace { |
| |
| #if LLVM_ENABLE_ZLIB == 1 && HAVE_LIBZ |
| |
| void TestZlibCompression(StringRef Input, zlib::CompressionLevel Level) { |
| OwningPtr<MemoryBuffer> Compressed; |
| OwningPtr<MemoryBuffer> Uncompressed; |
| EXPECT_EQ(zlib::StatusOK, zlib::compress(Input, Compressed, Level)); |
| // Check that uncompressed buffer is the same as original. |
| EXPECT_EQ(zlib::StatusOK, zlib::uncompress(Compressed->getBuffer(), |
| Uncompressed, Input.size())); |
| EXPECT_EQ(Input.size(), Uncompressed->getBufferSize()); |
| EXPECT_EQ(0, |
| memcmp(Input.data(), Uncompressed->getBufferStart(), Input.size())); |
| if (Input.size() > 0) { |
| // Uncompression fails if expected length is too short. |
| EXPECT_EQ(zlib::StatusBufferTooShort, |
| zlib::uncompress(Compressed->getBuffer(), Uncompressed, |
| Input.size() - 1)); |
| } |
| } |
| |
| TEST(CompressionTest, Zlib) { |
| TestZlibCompression("", zlib::DefaultCompression); |
| |
| TestZlibCompression("hello, world!", zlib::NoCompression); |
| TestZlibCompression("hello, world!", zlib::BestSizeCompression); |
| TestZlibCompression("hello, world!", zlib::BestSpeedCompression); |
| TestZlibCompression("hello, world!", zlib::DefaultCompression); |
| |
| const size_t kSize = 1024; |
| char BinaryData[kSize]; |
| for (size_t i = 0; i < kSize; ++i) { |
| BinaryData[i] = i & 255; |
| } |
| StringRef BinaryDataStr(BinaryData, kSize); |
| |
| TestZlibCompression(BinaryDataStr, zlib::NoCompression); |
| TestZlibCompression(BinaryDataStr, zlib::BestSizeCompression); |
| TestZlibCompression(BinaryDataStr, zlib::BestSpeedCompression); |
| TestZlibCompression(BinaryDataStr, zlib::DefaultCompression); |
| } |
| |
| #endif |
| |
| } |