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VirtualFileSystemTest.cpp
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//===- unittests/Basic/VirtualFileSystem.cpp ---------------- VFS tests ---===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/Basic/VirtualFileSystem.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
#include "gtest/gtest.h"
#include <map>
using namespace clang;
using namespace llvm;
using llvm::sys::fs::UniqueID;
namespace {
struct DummyFile : public vfs::File {
vfs::Status S;
explicit DummyFile(vfs::Status S) : S(S) {}
llvm::ErrorOr<vfs::Status> status() override { return S; }
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
getBuffer(const Twine &Name, int64_t FileSize, bool RequiresNullTerminator,
bool IsVolatile) override {
llvm_unreachable("unimplemented");
}
std::error_code close() override { return std::error_code(); }
};
class DummyFileSystem : public vfs::FileSystem {
int FSID; // used to produce UniqueIDs
int FileID; // used to produce UniqueIDs
std::map<std::string, vfs::Status> FilesAndDirs;
static int getNextFSID() {
static int Count = 0;
return Count++;
}
public:
DummyFileSystem() : FSID(getNextFSID()), FileID(0) {}
ErrorOr<vfs::Status> status(const Twine &Path) override {
std::map<std::string, vfs::Status>::iterator I =
FilesAndDirs.find(Path.str());
if (I == FilesAndDirs.end())
return make_error_code(llvm::errc::no_such_file_or_directory);
return I->second;
}
ErrorOr<std::unique_ptr<vfs::File>>
openFileForRead(const Twine &Path) override {
auto S = status(Path);
if (S)
return std::unique_ptr<vfs::File>(new DummyFile{*S});
return S.getError();
}
llvm::ErrorOr<std::string> getCurrentWorkingDirectory() const override {
return std::string();
}
std::error_code setCurrentWorkingDirectory(const Twine &Path) override {
return std::error_code();
}
struct DirIterImpl : public clang::vfs::detail::DirIterImpl {
std::map<std::string, vfs::Status> &FilesAndDirs;
std::map<std::string, vfs::Status>::iterator I;
std::string Path;
bool isInPath(StringRef S) {
if (Path.size() < S.size() && S.find(Path) == 0) {
auto LastSep = S.find_last_of('/');
if (LastSep == Path.size() || LastSep == Path.size()-1)
return true;
}
return false;
}
DirIterImpl(std::map<std::string, vfs::Status> &FilesAndDirs,
const Twine &_Path)
: FilesAndDirs(FilesAndDirs), I(FilesAndDirs.begin()),
Path(_Path.str()) {
for ( ; I != FilesAndDirs.end(); ++I) {
if (isInPath(I->first)) {
CurrentEntry = I->second;
break;
}
}
}
std::error_code increment() override {
++I;
for ( ; I != FilesAndDirs.end(); ++I) {
if (isInPath(I->first)) {
CurrentEntry = I->second;
break;
}
}
if (I == FilesAndDirs.end())
CurrentEntry = vfs::Status();
return std::error_code();
}
};
vfs::directory_iterator dir_begin(const Twine &Dir,
std::error_code &EC) override {
return vfs::directory_iterator(
std::make_shared<DirIterImpl>(FilesAndDirs, Dir));
}
void addEntry(StringRef Path, const vfs::Status &Status) {
FilesAndDirs[Path] = Status;
}
void addRegularFile(StringRef Path, sys::fs::perms Perms = sys::fs::all_all) {
vfs::Status S(Path, UniqueID(FSID, FileID++),
std::chrono::system_clock::now(), 0, 0, 1024,
sys::fs::file_type::regular_file, Perms);
addEntry(Path, S);
}
void addDirectory(StringRef Path, sys::fs::perms Perms = sys::fs::all_all) {
vfs::Status S(Path, UniqueID(FSID, FileID++),
std::chrono::system_clock::now(), 0, 0, 0,
sys::fs::file_type::directory_file, Perms);
addEntry(Path, S);
}
void addSymlink(StringRef Path) {
vfs::Status S(Path, UniqueID(FSID, FileID++),
std::chrono::system_clock::now(), 0, 0, 0,
sys::fs::file_type::symlink_file, sys::fs::all_all);
addEntry(Path, S);
}
};
} // end anonymous namespace
TEST(VirtualFileSystemTest, StatusQueries) {
IntrusiveRefCntPtr<DummyFileSystem> D(new DummyFileSystem());
ErrorOr<vfs::Status> Status((std::error_code()));
D->addRegularFile("/foo");
Status = D->status("/foo");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->isStatusKnown());
EXPECT_FALSE(Status->isDirectory());
EXPECT_TRUE(Status->isRegularFile());
EXPECT_FALSE(Status->isSymlink());
EXPECT_FALSE(Status->isOther());
EXPECT_TRUE(Status->exists());
D->addDirectory("/bar");
Status = D->status("/bar");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->isStatusKnown());
EXPECT_TRUE(Status->isDirectory());
EXPECT_FALSE(Status->isRegularFile());
EXPECT_FALSE(Status->isSymlink());
EXPECT_FALSE(Status->isOther());
EXPECT_TRUE(Status->exists());
D->addSymlink("/baz");
Status = D->status("/baz");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->isStatusKnown());
EXPECT_FALSE(Status->isDirectory());
EXPECT_FALSE(Status->isRegularFile());
EXPECT_TRUE(Status->isSymlink());
EXPECT_FALSE(Status->isOther());
EXPECT_TRUE(Status->exists());
EXPECT_TRUE(Status->equivalent(*Status));
ErrorOr<vfs::Status> Status2 = D->status("/foo");
ASSERT_FALSE(Status2.getError());
EXPECT_FALSE(Status->equivalent(*Status2));
}
TEST(VirtualFileSystemTest, BaseOnlyOverlay) {
IntrusiveRefCntPtr<DummyFileSystem> D(new DummyFileSystem());
ErrorOr<vfs::Status> Status((std::error_code()));
EXPECT_FALSE(Status = D->status("/foo"));
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(new vfs::OverlayFileSystem(D));
EXPECT_FALSE(Status = O->status("/foo"));
D->addRegularFile("/foo");
Status = D->status("/foo");
EXPECT_FALSE(Status.getError());
ErrorOr<vfs::Status> Status2((std::error_code()));
Status2 = O->status("/foo");
EXPECT_FALSE(Status2.getError());
EXPECT_TRUE(Status->equivalent(*Status2));
}
TEST(VirtualFileSystemTest, OverlayFiles) {
IntrusiveRefCntPtr<DummyFileSystem> Base(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Middle(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Top(new DummyFileSystem());
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Base));
O->pushOverlay(Middle);
O->pushOverlay(Top);
ErrorOr<vfs::Status> Status1((std::error_code())),
Status2((std::error_code())), Status3((std::error_code())),
StatusB((std::error_code())), StatusM((std::error_code())),
StatusT((std::error_code()));
Base->addRegularFile("/foo");
StatusB = Base->status("/foo");
ASSERT_FALSE(StatusB.getError());
Status1 = O->status("/foo");
ASSERT_FALSE(Status1.getError());
Middle->addRegularFile("/foo");
StatusM = Middle->status("/foo");
ASSERT_FALSE(StatusM.getError());
Status2 = O->status("/foo");
ASSERT_FALSE(Status2.getError());
Top->addRegularFile("/foo");
StatusT = Top->status("/foo");
ASSERT_FALSE(StatusT.getError());
Status3 = O->status("/foo");
ASSERT_FALSE(Status3.getError());
EXPECT_TRUE(Status1->equivalent(*StatusB));
EXPECT_TRUE(Status2->equivalent(*StatusM));
EXPECT_TRUE(Status3->equivalent(*StatusT));
EXPECT_FALSE(Status1->equivalent(*Status2));
EXPECT_FALSE(Status2->equivalent(*Status3));
EXPECT_FALSE(Status1->equivalent(*Status3));
}
TEST(VirtualFileSystemTest, OverlayDirsNonMerged) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(Upper);
Lower->addDirectory("/lower-only");
Upper->addDirectory("/upper-only");
// non-merged paths should be the same
ErrorOr<vfs::Status> Status1 = Lower->status("/lower-only");
ASSERT_FALSE(Status1.getError());
ErrorOr<vfs::Status> Status2 = O->status("/lower-only");
ASSERT_FALSE(Status2.getError());
EXPECT_TRUE(Status1->equivalent(*Status2));
Status1 = Upper->status("/upper-only");
ASSERT_FALSE(Status1.getError());
Status2 = O->status("/upper-only");
ASSERT_FALSE(Status2.getError());
EXPECT_TRUE(Status1->equivalent(*Status2));
}
TEST(VirtualFileSystemTest, MergedDirPermissions) {
// merged directories get the permissions of the upper dir
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(Upper);
ErrorOr<vfs::Status> Status((std::error_code()));
Lower->addDirectory("/both", sys::fs::owner_read);
Upper->addDirectory("/both", sys::fs::owner_all | sys::fs::group_read);
Status = O->status("/both");
ASSERT_FALSE(Status.getError());
EXPECT_EQ(0740, Status->getPermissions());
// permissions (as usual) are not recursively applied
Lower->addRegularFile("/both/foo", sys::fs::owner_read);
Upper->addRegularFile("/both/bar", sys::fs::owner_write);
Status = O->status("/both/foo");
ASSERT_FALSE( Status.getError());
EXPECT_EQ(0400, Status->getPermissions());
Status = O->status("/both/bar");
ASSERT_FALSE(Status.getError());
EXPECT_EQ(0200, Status->getPermissions());
}
namespace {
struct ScopedDir {
SmallString<128> Path;
ScopedDir(const Twine &Name, bool Unique=false) {
std::error_code EC;
if (Unique) {
EC = llvm::sys::fs::createUniqueDirectory(Name, Path);
} else {
Path = Name.str();
EC = llvm::sys::fs::create_directory(Twine(Path));
}
if (EC)
Path = "";
EXPECT_FALSE(EC);
}
~ScopedDir() {
if (Path != "") {
EXPECT_FALSE(llvm::sys::fs::remove(Path.str()));
}
}
operator StringRef() { return Path.str(); }
};
struct ScopedLink {
SmallString<128> Path;
ScopedLink(const Twine &To, const Twine &From) {
Path = From.str();
std::error_code EC = sys::fs::create_link(To, From);
if (EC)
Path = "";
EXPECT_FALSE(EC);
}
~ScopedLink() {
if (Path != "") {
EXPECT_FALSE(llvm::sys::fs::remove(Path.str()));
}
}
operator StringRef() { return Path.str(); }
};
} // end anonymous namespace
TEST(VirtualFileSystemTest, BasicRealFSIteration) {
ScopedDir TestDirectory("virtual-file-system-test", /*Unique*/true);
IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getRealFileSystem();
std::error_code EC;
vfs::directory_iterator I = FS->dir_begin(Twine(TestDirectory), EC);
ASSERT_FALSE(EC);
EXPECT_EQ(vfs::directory_iterator(), I); // empty directory is empty
ScopedDir _a(TestDirectory+"/a");
ScopedDir _ab(TestDirectory+"/a/b");
ScopedDir _c(TestDirectory+"/c");
ScopedDir _cd(TestDirectory+"/c/d");
I = FS->dir_begin(Twine(TestDirectory), EC);
ASSERT_FALSE(EC);
ASSERT_NE(vfs::directory_iterator(), I);
// Check either a or c, since we can't rely on the iteration order.
EXPECT_TRUE(I->getName().endswith("a") || I->getName().endswith("c"));
I.increment(EC);
ASSERT_FALSE(EC);
ASSERT_NE(vfs::directory_iterator(), I);
EXPECT_TRUE(I->getName().endswith("a") || I->getName().endswith("c"));
I.increment(EC);
EXPECT_EQ(vfs::directory_iterator(), I);
}
#ifdef LLVM_ON_UNIX
TEST(VirtualFileSystemTest, BrokenSymlinkRealFSIteration) {
ScopedDir TestDirectory("virtual-file-system-test", /*Unique*/ true);
IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getRealFileSystem();
ScopedLink _a("no_such_file", TestDirectory + "/a");
ScopedDir _b(TestDirectory + "/b");
ScopedLink _c("no_such_file", TestDirectory + "/c");
std::error_code EC;
for (vfs::directory_iterator I = FS->dir_begin(Twine(TestDirectory), EC), E;
I != E; I.increment(EC)) {
// Skip broken symlinks.
auto EC2 = std::make_error_code(std::errc::no_such_file_or_directory);
if (EC == EC2) {
EC.clear();
continue;
}
// For bot debugging.
if (EC) {
outs() << "Error code found:\n"
<< "EC value: " << EC.value() << "\n"
<< "EC category: " << EC.category().name()
<< "EC message: " << EC.message() << "\n";
outs() << "Error code tested for:\n"
<< "EC value: " << EC2.value() << "\n"
<< "EC category: " << EC2.category().name()
<< "EC message: " << EC2.message() << "\n";
}
ASSERT_FALSE(EC);
EXPECT_TRUE(I->getName() == _b);
}
}
#endif
TEST(VirtualFileSystemTest, BasicRealFSRecursiveIteration) {
ScopedDir TestDirectory("virtual-file-system-test", /*Unique*/true);
IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getRealFileSystem();
std::error_code EC;
auto I = vfs::recursive_directory_iterator(*FS, Twine(TestDirectory), EC);
ASSERT_FALSE(EC);
EXPECT_EQ(vfs::recursive_directory_iterator(), I); // empty directory is empty
ScopedDir _a(TestDirectory+"/a");
ScopedDir _ab(TestDirectory+"/a/b");
ScopedDir _c(TestDirectory+"/c");
ScopedDir _cd(TestDirectory+"/c/d");
I = vfs::recursive_directory_iterator(*FS, Twine(TestDirectory), EC);
ASSERT_FALSE(EC);
ASSERT_NE(vfs::recursive_directory_iterator(), I);
std::vector<std::string> Contents;
for (auto E = vfs::recursive_directory_iterator(); !EC && I != E;
I.increment(EC)) {
Contents.push_back(I->getName());
}
// Check contents, which may be in any order
EXPECT_EQ(4U, Contents.size());
int Counts[4] = { 0, 0, 0, 0 };
for (const std::string &Name : Contents) {
ASSERT_FALSE(Name.empty());
int Index = Name[Name.size()-1] - 'a';
ASSERT_TRUE(Index >= 0 && Index < 4);
Counts[Index]++;
}
EXPECT_EQ(1, Counts[0]); // a
EXPECT_EQ(1, Counts[1]); // b
EXPECT_EQ(1, Counts[2]); // c
EXPECT_EQ(1, Counts[3]); // d
}
#ifdef LLVM_ON_UNIX
TEST(VirtualFileSystemTest, BrokenSymlinkRealFSRecursiveIteration) {
ScopedDir TestDirectory("virtual-file-system-test", /*Unique*/ true);
IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getRealFileSystem();
ScopedLink _a("no_such_file", TestDirectory + "/a");
ScopedDir _b(TestDirectory + "/b");
ScopedLink _ba("no_such_file", TestDirectory + "/b/a");
ScopedDir _bb(TestDirectory + "/b/b");
ScopedLink _bc("no_such_file", TestDirectory + "/b/c");
ScopedLink _c("no_such_file", TestDirectory + "/c");
ScopedDir _d(TestDirectory + "/d");
ScopedDir _dd(TestDirectory + "/d/d");
ScopedDir _ddd(TestDirectory + "/d/d/d");
ScopedLink _e("no_such_file", TestDirectory + "/e");
std::vector<StringRef> Expected = {_b, _bb, _d, _dd, _ddd};
std::vector<std::string> Contents;
std::error_code EC;
for (vfs::recursive_directory_iterator I(*FS, Twine(TestDirectory), EC), E;
I != E; I.increment(EC)) {
// Skip broken symlinks.
auto EC2 = std::make_error_code(std::errc::no_such_file_or_directory);
if (EC == EC2) {
EC.clear();
continue;
}
// For bot debugging.
if (EC) {
outs() << "Error code found:\n"
<< "EC value: " << EC.value() << "\n"
<< "EC category: " << EC.category().name()
<< "EC message: " << EC.message() << "\n";
outs() << "Error code tested for:\n"
<< "EC value: " << EC2.value() << "\n"
<< "EC category: " << EC2.category().name()
<< "EC message: " << EC2.message() << "\n";
}
ASSERT_FALSE(EC);
Contents.push_back(I->getName());
}
// Check sorted contents.
std::sort(Contents.begin(), Contents.end());
EXPECT_EQ(Expected.size(), Contents.size());
EXPECT_TRUE(std::equal(Contents.begin(), Contents.end(), Expected.begin()));
}
#endif
template <typename DirIter>
static void checkContents(DirIter I, ArrayRef<StringRef> ExpectedOut) {
std::error_code EC;
SmallVector<StringRef, 4> Expected(ExpectedOut.begin(), ExpectedOut.end());
SmallVector<std::string, 4> InputToCheck;
// Do not rely on iteration order to check for contents, sort both
// content vectors before comparison.
for (DirIter E; !EC && I != E; I.increment(EC))
InputToCheck.push_back(I->getName());
std::sort(InputToCheck.begin(), InputToCheck.end());
std::sort(Expected.begin(), Expected.end());
EXPECT_EQ(InputToCheck.size(), Expected.size());
unsigned LastElt = std::min(InputToCheck.size(), Expected.size());
for (unsigned Idx = 0; Idx != LastElt; ++Idx)
EXPECT_EQ(StringRef(InputToCheck[Idx]), Expected[Idx]);
}
TEST(VirtualFileSystemTest, OverlayIteration) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(Upper);
std::error_code EC;
checkContents(O->dir_begin("/", EC), ArrayRef<StringRef>());
Lower->addRegularFile("/file1");
checkContents(O->dir_begin("/", EC), ArrayRef<StringRef>("/file1"));
Upper->addRegularFile("/file2");
checkContents(O->dir_begin("/", EC), {"/file2", "/file1"});
Lower->addDirectory("/dir1");
Lower->addRegularFile("/dir1/foo");
Upper->addDirectory("/dir2");
Upper->addRegularFile("/dir2/foo");
checkContents(O->dir_begin("/dir2", EC), ArrayRef<StringRef>("/dir2/foo"));
checkContents(O->dir_begin("/", EC), {"/dir2", "/file2", "/dir1", "/file1"});
}
TEST(VirtualFileSystemTest, OverlayRecursiveIteration) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Middle(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(Middle);
O->pushOverlay(Upper);
std::error_code EC;
checkContents(vfs::recursive_directory_iterator(*O, "/", EC),
ArrayRef<StringRef>());
Lower->addRegularFile("/file1");
checkContents(vfs::recursive_directory_iterator(*O, "/", EC),
ArrayRef<StringRef>("/file1"));
Upper->addDirectory("/dir");
Upper->addRegularFile("/dir/file2");
checkContents(vfs::recursive_directory_iterator(*O, "/", EC),
{"/dir", "/dir/file2", "/file1"});
Lower->addDirectory("/dir1");
Lower->addRegularFile("/dir1/foo");
Lower->addDirectory("/dir1/a");
Lower->addRegularFile("/dir1/a/b");
Middle->addDirectory("/a");
Middle->addDirectory("/a/b");
Middle->addDirectory("/a/b/c");
Middle->addRegularFile("/a/b/c/d");
Middle->addRegularFile("/hiddenByUp");
Upper->addDirectory("/dir2");
Upper->addRegularFile("/dir2/foo");
Upper->addRegularFile("/hiddenByUp");
checkContents(vfs::recursive_directory_iterator(*O, "/dir2", EC),
ArrayRef<StringRef>("/dir2/foo"));
checkContents(vfs::recursive_directory_iterator(*O, "/", EC),
{"/dir", "/dir/file2", "/dir2", "/dir2/foo", "/hiddenByUp",
"/a", "/a/b", "/a/b/c", "/a/b/c/d", "/dir1", "/dir1/a",
"/dir1/a/b", "/dir1/foo", "/file1"});
}
TEST(VirtualFileSystemTest, ThreeLevelIteration) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Middle(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(Middle);
O->pushOverlay(Upper);
std::error_code EC;
checkContents(O->dir_begin("/", EC), ArrayRef<StringRef>());
Middle->addRegularFile("/file2");
checkContents(O->dir_begin("/", EC), ArrayRef<StringRef>("/file2"));
Lower->addRegularFile("/file1");
Upper->addRegularFile("/file3");
checkContents(O->dir_begin("/", EC), {"/file3", "/file2", "/file1"});
}
TEST(VirtualFileSystemTest, HiddenInIteration) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Middle(new DummyFileSystem());
IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(Middle);
O->pushOverlay(Upper);
std::error_code EC;
Lower->addRegularFile("/onlyInLow", sys::fs::owner_read);
Lower->addRegularFile("/hiddenByMid", sys::fs::owner_read);
Lower->addRegularFile("/hiddenByUp", sys::fs::owner_read);
Middle->addRegularFile("/onlyInMid", sys::fs::owner_write);
Middle->addRegularFile("/hiddenByMid", sys::fs::owner_write);
Middle->addRegularFile("/hiddenByUp", sys::fs::owner_write);
Upper->addRegularFile("/onlyInUp", sys::fs::owner_all);
Upper->addRegularFile("/hiddenByUp", sys::fs::owner_all);
checkContents(
O->dir_begin("/", EC),
{"/hiddenByUp", "/onlyInUp", "/hiddenByMid", "/onlyInMid", "/onlyInLow"});
// Make sure we get the top-most entry
{
std::error_code EC;
vfs::directory_iterator I = O->dir_begin("/", EC), E;
for ( ; !EC && I != E; I.increment(EC))
if (I->getName() == "/hiddenByUp")
break;
ASSERT_NE(E, I);
EXPECT_EQ(sys::fs::owner_all, I->getPermissions());
}
{
std::error_code EC;
vfs::directory_iterator I = O->dir_begin("/", EC), E;
for ( ; !EC && I != E; I.increment(EC))
if (I->getName() == "/hiddenByMid")
break;
ASSERT_NE(E, I);
EXPECT_EQ(sys::fs::owner_write, I->getPermissions());
}
}
class InMemoryFileSystemTest : public ::testing::Test {
protected:
clang::vfs::InMemoryFileSystem FS;
clang::vfs::InMemoryFileSystem NormalizedFS;
InMemoryFileSystemTest()
: FS(/*UseNormalizedPaths=*/false),
NormalizedFS(/*UseNormalizedPaths=*/true) {}
};
TEST_F(InMemoryFileSystemTest, IsEmpty) {
auto Stat = FS.status("/a");
ASSERT_EQ(Stat.getError(),errc::no_such_file_or_directory) << FS.toString();
Stat = FS.status("/");
ASSERT_EQ(Stat.getError(), errc::no_such_file_or_directory) << FS.toString();
}
TEST_F(InMemoryFileSystemTest, WindowsPath) {
FS.addFile("c:/windows/system128/foo.cpp", 0, MemoryBuffer::getMemBuffer(""));
auto Stat = FS.status("c:");
#if !defined(_WIN32)
ASSERT_FALSE(Stat.getError()) << Stat.getError() << FS.toString();
#endif
Stat = FS.status("c:/windows/system128/foo.cpp");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << FS.toString();
FS.addFile("d:/windows/foo.cpp", 0, MemoryBuffer::getMemBuffer(""));
Stat = FS.status("d:/windows/foo.cpp");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << FS.toString();
}
TEST_F(InMemoryFileSystemTest, OverlayFile) {
FS.addFile("/a", 0, MemoryBuffer::getMemBuffer("a"));
NormalizedFS.addFile("/a", 0, MemoryBuffer::getMemBuffer("a"));
auto Stat = FS.status("/");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << FS.toString();
Stat = FS.status("/.");
ASSERT_FALSE(Stat);
Stat = NormalizedFS.status("/.");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << FS.toString();
Stat = FS.status("/a");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_EQ("/a", Stat->getName());
}
TEST_F(InMemoryFileSystemTest, OverlayFileNoOwn) {
auto Buf = MemoryBuffer::getMemBuffer("a");
FS.addFileNoOwn("/a", 0, Buf.get());
auto Stat = FS.status("/a");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_EQ("/a", Stat->getName());
}
TEST_F(InMemoryFileSystemTest, OpenFileForRead) {
FS.addFile("/a", 0, MemoryBuffer::getMemBuffer("a"));
FS.addFile("././c", 0, MemoryBuffer::getMemBuffer("c"));
FS.addFile("./d/../d", 0, MemoryBuffer::getMemBuffer("d"));
NormalizedFS.addFile("/a", 0, MemoryBuffer::getMemBuffer("a"));
NormalizedFS.addFile("././c", 0, MemoryBuffer::getMemBuffer("c"));
NormalizedFS.addFile("./d/../d", 0, MemoryBuffer::getMemBuffer("d"));
auto File = FS.openFileForRead("/a");
ASSERT_EQ("a", (*(*File)->getBuffer("ignored"))->getBuffer());
File = FS.openFileForRead("/a"); // Open again.
ASSERT_EQ("a", (*(*File)->getBuffer("ignored"))->getBuffer());
File = NormalizedFS.openFileForRead("/././a"); // Open again.
ASSERT_EQ("a", (*(*File)->getBuffer("ignored"))->getBuffer());
File = FS.openFileForRead("/");
ASSERT_EQ(File.getError(), errc::invalid_argument) << FS.toString();
File = FS.openFileForRead("/b");
ASSERT_EQ(File.getError(), errc::no_such_file_or_directory) << FS.toString();
File = FS.openFileForRead("./c");
ASSERT_FALSE(File);
File = FS.openFileForRead("e/../d");
ASSERT_FALSE(File);
File = NormalizedFS.openFileForRead("./c");
ASSERT_EQ("c", (*(*File)->getBuffer("ignored"))->getBuffer());
File = NormalizedFS.openFileForRead("e/../d");
ASSERT_EQ("d", (*(*File)->getBuffer("ignored"))->getBuffer());
}
TEST_F(InMemoryFileSystemTest, DuplicatedFile) {
ASSERT_TRUE(FS.addFile("/a", 0, MemoryBuffer::getMemBuffer("a")));
ASSERT_FALSE(FS.addFile("/a/b", 0, MemoryBuffer::getMemBuffer("a")));
ASSERT_TRUE(FS.addFile("/a", 0, MemoryBuffer::getMemBuffer("a")));
ASSERT_FALSE(FS.addFile("/a", 0, MemoryBuffer::getMemBuffer("b")));
}
TEST_F(InMemoryFileSystemTest, DirectoryIteration) {
FS.addFile("/a", 0, MemoryBuffer::getMemBuffer(""));
FS.addFile("/b/c", 0, MemoryBuffer::getMemBuffer(""));
std::error_code EC;
vfs::directory_iterator I = FS.dir_begin("/", EC);
ASSERT_FALSE(EC);
ASSERT_EQ("/a", I->getName());
I.increment(EC);
ASSERT_FALSE(EC);
ASSERT_EQ("/b", I->getName());
I.increment(EC);
ASSERT_FALSE(EC);
ASSERT_EQ(vfs::directory_iterator(), I);
I = FS.dir_begin("/b", EC);
ASSERT_FALSE(EC);
ASSERT_EQ("/b/c", I->getName());
I.increment(EC);
ASSERT_FALSE(EC);
ASSERT_EQ(vfs::directory_iterator(), I);
}
TEST_F(InMemoryFileSystemTest, WorkingDirectory) {
FS.setCurrentWorkingDirectory("/b");
FS.addFile("c", 0, MemoryBuffer::getMemBuffer(""));
auto Stat = FS.status("/b/c");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_EQ("c", Stat->getName());
ASSERT_EQ("/b", *FS.getCurrentWorkingDirectory());
Stat = FS.status("c");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
auto ReplaceBackslashes = [](std::string S) {
std::replace(S.begin(), S.end(), '\\', '/');
return S;
};
NormalizedFS.setCurrentWorkingDirectory("/b/c");
NormalizedFS.setCurrentWorkingDirectory(".");
ASSERT_EQ("/b/c", ReplaceBackslashes(
NormalizedFS.getCurrentWorkingDirectory().get()));
NormalizedFS.setCurrentWorkingDirectory("..");
ASSERT_EQ("/b", ReplaceBackslashes(
NormalizedFS.getCurrentWorkingDirectory().get()));
}
// NOTE: in the tests below, we use '//root/' as our root directory, since it is
// a legal *absolute* path on Windows as well as *nix.
class VFSFromYAMLTest : public ::testing::Test {
public:
int NumDiagnostics;
void SetUp() override { NumDiagnostics = 0; }
static void CountingDiagHandler(const SMDiagnostic &, void *Context) {
VFSFromYAMLTest *Test = static_cast<VFSFromYAMLTest *>(Context);
++Test->NumDiagnostics;
}
IntrusiveRefCntPtr<vfs::FileSystem>
getFromYAMLRawString(StringRef Content,
IntrusiveRefCntPtr<vfs::FileSystem> ExternalFS) {
std::unique_ptr<MemoryBuffer> Buffer = MemoryBuffer::getMemBuffer(Content);
return getVFSFromYAML(std::move(Buffer), CountingDiagHandler, "", this,
ExternalFS);
}
IntrusiveRefCntPtr<vfs::FileSystem> getFromYAMLString(
StringRef Content,
IntrusiveRefCntPtr<vfs::FileSystem> ExternalFS = new DummyFileSystem()) {
std::string VersionPlusContent("{\n 'version':0,\n");
VersionPlusContent += Content.slice(Content.find('{') + 1, StringRef::npos);
return getFromYAMLRawString(VersionPlusContent, ExternalFS);
}
// This is intended as a "XFAIL" for windows hosts.
bool supportsSameDirMultipleYAMLEntries() {
Triple Host(Triple::normalize(sys::getProcessTriple()));
return !Host.isOSWindows();
}
};
TEST_F(VFSFromYAMLTest, BasicVFSFromYAML) {
IntrusiveRefCntPtr<vfs::FileSystem> FS;
FS = getFromYAMLString("");
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLString("[]");
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLString("'string'");
EXPECT_EQ(nullptr, FS.get());
EXPECT_EQ(3, NumDiagnostics);
}
TEST_F(VFSFromYAMLTest, MappedFiles) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("//root/foo/bar/a");
IntrusiveRefCntPtr<vfs::FileSystem> FS =
getFromYAMLString("{ 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'file1',\n"
" 'external-contents': '//root/foo/bar/a'\n"
" },\n"
" {\n"
" 'type': 'file',\n"
" 'name': 'file2',\n"
" 'external-contents': '//root/foo/b'\n"
" }\n"
" ]\n"
"}\n"
"]\n"
"}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(FS);
// file
ErrorOr<vfs::Status> S = O->status("//root/file1");
ASSERT_FALSE(S.getError());
EXPECT_EQ("//root/foo/bar/a", S->getName());
EXPECT_TRUE(S->IsVFSMapped);
ErrorOr<vfs::Status> SLower = O->status("//root/foo/bar/a");
EXPECT_EQ("//root/foo/bar/a", SLower->getName());
EXPECT_TRUE(S->equivalent(*SLower));
EXPECT_FALSE(SLower->IsVFSMapped);
// file after opening
auto OpenedF = O->openFileForRead("//root/file1");
ASSERT_FALSE(OpenedF.getError());
auto OpenedS = (*OpenedF)->status();
ASSERT_FALSE(OpenedS.getError());
EXPECT_EQ("//root/foo/bar/a", OpenedS->getName());
EXPECT_TRUE(OpenedS->IsVFSMapped);
// directory
S = O->status("//root/");
ASSERT_FALSE(S.getError());
EXPECT_TRUE(S->isDirectory());
EXPECT_TRUE(S->equivalent(*O->status("//root/"))); // non-volatile UniqueID
// broken mapping
EXPECT_EQ(O->status("//root/file2").getError(),
llvm::errc::no_such_file_or_directory);
EXPECT_EQ(0, NumDiagnostics);
}
TEST_F(VFSFromYAMLTest, CaseInsensitive) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("//root/foo/bar/a");
IntrusiveRefCntPtr<vfs::FileSystem> FS =
getFromYAMLString("{ 'case-sensitive': 'false',\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'XX',\n"
" 'external-contents': '//root/foo/bar/a'\n"
" }\n"
" ]\n"
"}]}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(FS);
ErrorOr<vfs::Status> S = O->status("//root/XX");
ASSERT_FALSE(S.getError());
ErrorOr<vfs::Status> SS = O->status("//root/xx");
ASSERT_FALSE(SS.getError());
EXPECT_TRUE(S->equivalent(*SS));
SS = O->status("//root/xX");
EXPECT_TRUE(S->equivalent(*SS));
SS = O->status("//root/Xx");
EXPECT_TRUE(S->equivalent(*SS));
EXPECT_EQ(0, NumDiagnostics);
}
TEST_F(VFSFromYAMLTest, CaseSensitive) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("//root/foo/bar/a");
IntrusiveRefCntPtr<vfs::FileSystem> FS =
getFromYAMLString("{ 'case-sensitive': 'true',\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'XX',\n"
" 'external-contents': '//root/foo/bar/a'\n"
" }\n"
" ]\n"
"}]}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(FS);
ErrorOr<vfs::Status> SS = O->status("//root/xx");
EXPECT_EQ(SS.getError(), llvm::errc::no_such_file_or_directory);
SS = O->status("//root/xX");
EXPECT_EQ(SS.getError(), llvm::errc::no_such_file_or_directory);
SS = O->status("//root/Xx");
EXPECT_EQ(SS.getError(), llvm::errc::no_such_file_or_directory);
EXPECT_EQ(0, NumDiagnostics);
}
TEST_F(VFSFromYAMLTest, IllegalVFSFile) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
// invalid YAML at top-level
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString("{]", Lower);
EXPECT_EQ(nullptr, FS.get());
// invalid YAML in roots
FS = getFromYAMLString("{ 'roots':[}", Lower);
// invalid YAML in directory
FS = getFromYAMLString(
"{ 'roots':[ { 'name': 'foo', 'type': 'directory', 'contents': [}",
Lower);
EXPECT_EQ(nullptr, FS.get());
// invalid configuration
FS = getFromYAMLString("{ 'knobular': 'true', 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLString("{ 'case-sensitive': 'maybe', 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.get());
// invalid roots
FS = getFromYAMLString("{ 'roots':'' }", Lower);
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLString("{ 'roots':{} }", Lower);
EXPECT_EQ(nullptr, FS.get());
// invalid entries
FS = getFromYAMLString(
"{ 'roots':[ { 'type': 'other', 'name': 'me', 'contents': '' }", Lower);
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLString("{ 'roots':[ { 'type': 'file', 'name': [], "
"'external-contents': 'other' }",
Lower);
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLString(
"{ 'roots':[ { 'type': 'file', 'name': 'me', 'external-contents': [] }",
Lower);
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLString(
"{ 'roots':[ { 'type': 'file', 'name': 'me', 'external-contents': {} }",
Lower);
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLString(
"{ 'roots':[ { 'type': 'directory', 'name': 'me', 'contents': {} }",
Lower);
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLString(
"{ 'roots':[ { 'type': 'directory', 'name': 'me', 'contents': '' }",
Lower);
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLString(
"{ 'roots':[ { 'thingy': 'directory', 'name': 'me', 'contents': [] }",
Lower);
EXPECT_EQ(nullptr, FS.get());
// missing mandatory fields
FS = getFromYAMLString("{ 'roots':[ { 'type': 'file', 'name': 'me' }", Lower);
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLString(
"{ 'roots':[ { 'type': 'file', 'external-contents': 'other' }", Lower);
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLString("{ 'roots':[ { 'name': 'me', 'contents': [] }", Lower);
EXPECT_EQ(nullptr, FS.get());