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comparison unittests/Support/TarWriterTest.cpp @ 121:803732b1fca8

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LLVM 5.0
author kono
date Fri, 27 Oct 2017 17:07:41 +0900
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children 3a76565eade5
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120:1172e4bd9c6f 121:803732b1fca8
1 //===- llvm/unittest/Support/TarWriterTest.cpp ----------------------------===//
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 #include "llvm/Support/TarWriter.h"
11 #include "llvm/Support/FileSystem.h"
12 #include "llvm/Support/MemoryBuffer.h"
13 #include "gtest/gtest.h"
14 #include <vector>
15
16 using namespace llvm;
17 namespace {
18
19 struct UstarHeader {
20 char Name[100];
21 char Mode[8];
22 char Uid[8];
23 char Gid[8];
24 char Size[12];
25 char Mtime[12];
26 char Checksum[8];
27 char TypeFlag;
28 char Linkname[100];
29 char Magic[6];
30 char Version[2];
31 char Uname[32];
32 char Gname[32];
33 char DevMajor[8];
34 char DevMinor[8];
35 char Prefix[155];
36 char Pad[12];
37 };
38
39 class TarWriterTest : public ::testing::Test {};
40
41 static std::vector<uint8_t> createTar(StringRef Base, StringRef Filename) {
42 // Create a temporary file.
43 SmallString<128> Path;
44 std::error_code EC =
45 sys::fs::createTemporaryFile("TarWriterTest", "tar", Path);
46 EXPECT_FALSE((bool)EC);
47
48 // Create a tar file.
49 Expected<std::unique_ptr<TarWriter>> TarOrErr = TarWriter::create(Path, Base);
50 EXPECT_TRUE((bool)TarOrErr);
51 std::unique_ptr<TarWriter> Tar = std::move(*TarOrErr);
52 Tar->append(Filename, "contents");
53 Tar.reset();
54
55 // Read the tar file.
56 ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr = MemoryBuffer::getFile(Path);
57 EXPECT_TRUE((bool)MBOrErr);
58 std::unique_ptr<MemoryBuffer> MB = std::move(*MBOrErr);
59 std::vector<uint8_t> Buf((const uint8_t *)MB->getBufferStart(),
60 (const uint8_t *)MB->getBufferEnd());
61
62 // Windows does not allow us to remove a mmap'ed files, so
63 // unmap first and then remove the temporary file.
64 MB = nullptr;
65 sys::fs::remove(Path);
66
67 return Buf;
68 }
69
70 static UstarHeader createUstar(StringRef Base, StringRef Filename) {
71 std::vector<uint8_t> Buf = createTar(Base, Filename);
72 EXPECT_TRUE(Buf.size() >= sizeof(UstarHeader));
73 return *reinterpret_cast<const UstarHeader *>(Buf.data());
74 }
75
76 TEST_F(TarWriterTest, Basics) {
77 UstarHeader Hdr = createUstar("base", "file");
78 EXPECT_EQ("ustar", StringRef(Hdr.Magic));
79 EXPECT_EQ("00", StringRef(Hdr.Version, 2));
80 EXPECT_EQ("base/file", StringRef(Hdr.Name));
81 EXPECT_EQ("00000000010", StringRef(Hdr.Size));
82 }
83
84 TEST_F(TarWriterTest, LongFilename) {
85 std::string x154(154, 'x');
86 std::string x155(155, 'x');
87 std::string y99(99, 'y');
88 std::string y100(100, 'y');
89
90 UstarHeader Hdr1 = createUstar("", x154 + "/" + y99);
91 EXPECT_EQ("/" + x154, StringRef(Hdr1.Prefix));
92 EXPECT_EQ(y99, StringRef(Hdr1.Name));
93
94 UstarHeader Hdr2 = createUstar("", x155 + "/" + y99);
95 EXPECT_EQ("", StringRef(Hdr2.Prefix));
96 EXPECT_EQ("", StringRef(Hdr2.Name));
97
98 UstarHeader Hdr3 = createUstar("", x154 + "/" + y100);
99 EXPECT_EQ("", StringRef(Hdr3.Prefix));
100 EXPECT_EQ("", StringRef(Hdr3.Name));
101
102 UstarHeader Hdr4 = createUstar("", x155 + "/" + y100);
103 EXPECT_EQ("", StringRef(Hdr4.Prefix));
104 EXPECT_EQ("", StringRef(Hdr4.Name));
105
106 std::string yz = "yyyyyyyyyyyyyyyyyyyy/zzzzzzzzzzzzzzzzzzzz";
107 UstarHeader Hdr5 = createUstar("", x154 + "/" + yz);
108 EXPECT_EQ("/" + x154, StringRef(Hdr5.Prefix));
109 EXPECT_EQ(yz, StringRef(Hdr5.Name));
110 }
111
112 TEST_F(TarWriterTest, Pax) {
113 std::vector<uint8_t> Buf = createTar("", std::string(200, 'x'));
114 EXPECT_TRUE(Buf.size() >= 1024);
115
116 auto *Hdr = reinterpret_cast<const UstarHeader *>(Buf.data());
117 EXPECT_EQ("", StringRef(Hdr->Prefix));
118 EXPECT_EQ("", StringRef(Hdr->Name));
119
120 StringRef Pax = StringRef((char *)(Buf.data() + 512), 512);
121 EXPECT_TRUE(Pax.startswith("211 path=/" + std::string(200, 'x')));
122 }
123 }