1 //===- llvm/unittest/Support/CompressionTest.cpp - Compression tests ------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements unit tests for the Compression functions.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "llvm/Support/Compression.h"
15 #include "llvm/ADT/SmallString.h"
16 #include "llvm/ADT/StringRef.h"
17 #include "llvm/Config/config.h"
18 #include "llvm/Support/Error.h"
19 #include "gtest/gtest.h"
20
21 using namespace llvm;
22
23 namespace {
24
25 #if LLVM_ENABLE_ZLIB == 1 && HAVE_LIBZ
26
TestZlibCompression(StringRef Input,zlib::CompressionLevel Level)27 void TestZlibCompression(StringRef Input, zlib::CompressionLevel Level) {
28 SmallString<32> Compressed;
29 SmallString<32> Uncompressed;
30
31 Error E = zlib::compress(Input, Compressed, Level);
32 EXPECT_FALSE(E);
33 consumeError(std::move(E));
34
35 // Check that uncompressed buffer is the same as original.
36 E = zlib::uncompress(Compressed, Uncompressed, Input.size());
37 EXPECT_FALSE(E);
38 consumeError(std::move(E));
39
40 EXPECT_EQ(Input, Uncompressed);
41 if (Input.size() > 0) {
42 // Uncompression fails if expected length is too short.
43 E = zlib::uncompress(Compressed, Uncompressed, Input.size() - 1);
44 EXPECT_EQ("zlib error: Z_BUF_ERROR", llvm::toString(std::move(E)));
45 }
46 }
47
TEST(CompressionTest,Zlib)48 TEST(CompressionTest, Zlib) {
49 TestZlibCompression("", zlib::DefaultCompression);
50
51 TestZlibCompression("hello, world!", zlib::NoCompression);
52 TestZlibCompression("hello, world!", zlib::BestSizeCompression);
53 TestZlibCompression("hello, world!", zlib::BestSpeedCompression);
54 TestZlibCompression("hello, world!", zlib::DefaultCompression);
55
56 const size_t kSize = 1024;
57 char BinaryData[kSize];
58 for (size_t i = 0; i < kSize; ++i) {
59 BinaryData[i] = i & 255;
60 }
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
TEST(CompressionTest,ZlibCRC32)69 TEST(CompressionTest, ZlibCRC32) {
70 EXPECT_EQ(
71 0x414FA339U,
72 zlib::crc32(StringRef("The quick brown fox jumps over the lazy dog")));
73 }
74
75 #endif
76
77 }
78