forked from OSchip/llvm-project
124 lines
3.7 KiB
C++
124 lines
3.7 KiB
C++
//===- llvm/unittest/Support/TarWriterTest.cpp ----------------------------===//
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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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#include "llvm/Support/TarWriter.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "gtest/gtest.h"
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#include <vector>
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using namespace llvm;
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namespace {
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struct UstarHeader {
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char Name[100];
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char Mode[8];
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char Uid[8];
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char Gid[8];
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char Size[12];
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char Mtime[12];
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char Checksum[8];
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char TypeFlag;
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char Linkname[100];
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char Magic[6];
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char Version[2];
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char Uname[32];
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char Gname[32];
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char DevMajor[8];
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char DevMinor[8];
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char Prefix[155];
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char Pad[12];
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};
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class TarWriterTest : public ::testing::Test {};
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static std::vector<uint8_t> createTar(StringRef Base, StringRef Filename) {
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// Create a temporary file.
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SmallString<128> Path;
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std::error_code EC =
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sys::fs::createTemporaryFile("TarWriterTest", "tar", Path);
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EXPECT_FALSE((bool)EC);
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// Create a tar file.
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Expected<std::unique_ptr<TarWriter>> TarOrErr = TarWriter::create(Path, Base);
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EXPECT_TRUE((bool)TarOrErr);
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std::unique_ptr<TarWriter> Tar = std::move(*TarOrErr);
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Tar->append(Filename, "contents");
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Tar.reset();
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// Read the tar file.
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ErrorOr<std::unique_ptr<MemoryBuffer>> MBOrErr = MemoryBuffer::getFile(Path);
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EXPECT_TRUE((bool)MBOrErr);
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std::unique_ptr<MemoryBuffer> MB = std::move(*MBOrErr);
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std::vector<uint8_t> Buf((const uint8_t *)MB->getBufferStart(),
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(const uint8_t *)MB->getBufferEnd());
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// Windows does not allow us to remove a mmap'ed files, so
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// unmap first and then remove the temporary file.
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MB = nullptr;
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sys::fs::remove(Path);
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return Buf;
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}
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static UstarHeader createUstar(StringRef Base, StringRef Filename) {
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std::vector<uint8_t> Buf = createTar(Base, Filename);
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EXPECT_TRUE(Buf.size() >= sizeof(UstarHeader));
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return *reinterpret_cast<const UstarHeader *>(Buf.data());
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}
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TEST_F(TarWriterTest, Basics) {
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UstarHeader Hdr = createUstar("base", "file");
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EXPECT_EQ("ustar", StringRef(Hdr.Magic));
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EXPECT_EQ("00", StringRef(Hdr.Version, 2));
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EXPECT_EQ("base/file", StringRef(Hdr.Name));
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EXPECT_EQ("00000000010", StringRef(Hdr.Size));
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}
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TEST_F(TarWriterTest, LongFilename) {
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std::string x154(154, 'x');
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std::string x155(155, 'x');
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std::string y99(99, 'y');
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std::string y100(100, 'y');
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UstarHeader Hdr1 = createUstar("", x154 + "/" + y99);
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EXPECT_EQ("/" + x154, StringRef(Hdr1.Prefix));
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EXPECT_EQ(y99, StringRef(Hdr1.Name));
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UstarHeader Hdr2 = createUstar("", x155 + "/" + y99);
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EXPECT_EQ("", StringRef(Hdr2.Prefix));
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EXPECT_EQ("", StringRef(Hdr2.Name));
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UstarHeader Hdr3 = createUstar("", x154 + "/" + y100);
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EXPECT_EQ("", StringRef(Hdr3.Prefix));
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EXPECT_EQ("", StringRef(Hdr3.Name));
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UstarHeader Hdr4 = createUstar("", x155 + "/" + y100);
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EXPECT_EQ("", StringRef(Hdr4.Prefix));
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EXPECT_EQ("", StringRef(Hdr4.Name));
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std::string yz = "yyyyyyyyyyyyyyyyyyyy/zzzzzzzzzzzzzzzzzzzz";
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UstarHeader Hdr5 = createUstar("", x154 + "/" + yz);
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EXPECT_EQ("/" + x154, StringRef(Hdr5.Prefix));
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EXPECT_EQ(yz, StringRef(Hdr5.Name));
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}
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TEST_F(TarWriterTest, Pax) {
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std::vector<uint8_t> Buf = createTar("", std::string(200, 'x'));
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EXPECT_TRUE(Buf.size() >= 1024);
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auto *Hdr = reinterpret_cast<const UstarHeader *>(Buf.data());
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EXPECT_EQ("", StringRef(Hdr->Prefix));
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EXPECT_EQ("", StringRef(Hdr->Name));
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StringRef Pax = StringRef((char *)(Buf.data() + 512), 512);
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EXPECT_TRUE(Pax.startswith("211 path=/" + std::string(200, 'x')));
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}
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}
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