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llvm-for-llvmta/unittests/Support/VirtualFileSystemTest.cpp

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2022-04-25 10:02:23 +02:00
//===- unittests/Support/VirtualFileSystem.cpp -------------- VFS tests ---===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/VirtualFileSystem.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Config/llvm-config.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Testing/Support/SupportHelpers.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include <map>
#include <string>
using namespace llvm;
using llvm::sys::fs::UniqueID;
using llvm::unittest::TempDir;
using llvm::unittest::TempFile;
using llvm::unittest::TempLink;
using testing::ElementsAre;
using testing::Pair;
using testing::UnorderedElementsAre;
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::string WorkingDirectory;
std::map<std::string, vfs::Status> FilesAndDirs;
typedef std::map<std::string, vfs::Status>::const_iterator const_iterator;
static int getNextFSID() {
static int Count = 0;
return Count++;
}
public:
DummyFileSystem() : FSID(getNextFSID()), FileID(0) {}
ErrorOr<vfs::Status> status(const Twine &Path) override {
auto I = findEntry(Path);
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 WorkingDirectory;
}
std::error_code setCurrentWorkingDirectory(const Twine &Path) override {
WorkingDirectory = Path.str();
return std::error_code();
}
// Map any symlink to "/symlink".
std::error_code getRealPath(const Twine &Path,
SmallVectorImpl<char> &Output) const override {
auto I = findEntry(Path);
if (I == FilesAndDirs.end())
return make_error_code(llvm::errc::no_such_file_or_directory);
if (I->second.isSymlink()) {
Output.clear();
Twine("/symlink").toVector(Output);
return std::error_code();
}
Output.clear();
Path.toVector(Output);
return std::error_code();
}
struct DirIterImpl : public llvm::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 = vfs::directory_entry(std::string(I->second.getName()),
I->second.getType());
break;
}
}
}
std::error_code increment() override {
++I;
for (; I != FilesAndDirs.end(); ++I) {
if (isInPath(I->first)) {
CurrentEntry = vfs::directory_entry(std::string(I->second.getName()),
I->second.getType());
break;
}
}
if (I == FilesAndDirs.end())
CurrentEntry = vfs::directory_entry();
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[std::string(Path)] = Status;
}
const_iterator findEntry(const Twine &Path) const {
SmallString<128> P;
Path.toVector(P);
std::error_code EC = makeAbsolute(P);
assert(!EC);
(void)EC;
return FilesAndDirs.find(std::string(P.str()));
}
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);
}
};
class ErrorDummyFileSystem : public DummyFileSystem {
std::error_code setCurrentWorkingDirectory(const Twine &Path) override {
return llvm::errc::no_such_file_or_directory;
}
};
/// Replace back-slashes by front-slashes.
std::string getPosixPath(std::string S) {
SmallString<128> Result;
llvm::sys::path::native(S, Result, llvm::sys::path::Style::posix);
return std::string(Result.str());
}
} // 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, GetRealPathInOverlay) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("/foo");
Lower->addSymlink("/lower_link");
IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(Upper);
// Regular file.
SmallString<16> RealPath;
EXPECT_FALSE(O->getRealPath("/foo", RealPath));
EXPECT_EQ(RealPath.str(), "/foo");
// Expect no error getting real path for symlink in lower overlay.
EXPECT_FALSE(O->getRealPath("/lower_link", RealPath));
EXPECT_EQ(RealPath.str(), "/symlink");
// Try a non-existing link.
EXPECT_EQ(O->getRealPath("/upper_link", RealPath),
errc::no_such_file_or_directory);
// Add a new symlink in upper.
Upper->addSymlink("/upper_link");
EXPECT_FALSE(O->getRealPath("/upper_link", RealPath));
EXPECT_EQ(RealPath.str(), "/symlink");
}
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());
}
TEST(VirtualFileSystemTest, OverlayIterator) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("/foo");
IntrusiveRefCntPtr<DummyFileSystem> Upper(new DummyFileSystem());
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(Upper);
ErrorOr<vfs::Status> Status((std::error_code()));
{
auto it = O->overlays_begin();
auto end = O->overlays_end();
EXPECT_NE(it, end);
Status = (*it)->status("/foo");
ASSERT_TRUE(Status.getError());
it++;
EXPECT_NE(it, end);
Status = (*it)->status("/foo");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->exists());
it++;
EXPECT_EQ(it, end);
}
{
auto it = O->overlays_rbegin();
auto end = O->overlays_rend();
EXPECT_NE(it, end);
Status = (*it)->status("/foo");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->exists());
it++;
EXPECT_NE(it, end);
Status = (*it)->status("/foo");
ASSERT_TRUE(Status.getError());
it++;
EXPECT_EQ(it, end);
}
}
TEST(VirtualFileSystemTest, BasicRealFSIteration) {
TempDir 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.path()), EC);
ASSERT_FALSE(EC);
EXPECT_EQ(vfs::directory_iterator(), I); // empty directory is empty
TempDir _a(TestDirectory.path("a"));
TempDir _ab(TestDirectory.path("a/b"));
TempDir _c(TestDirectory.path("c"));
TempDir _cd(TestDirectory.path("c/d"));
I = FS->dir_begin(Twine(TestDirectory.path()), 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->path().endswith("a") || I->path().endswith("c"));
I.increment(EC);
ASSERT_FALSE(EC);
ASSERT_NE(vfs::directory_iterator(), I);
EXPECT_TRUE(I->path().endswith("a") || I->path().endswith("c"));
I.increment(EC);
EXPECT_EQ(vfs::directory_iterator(), I);
}
#ifdef LLVM_ON_UNIX
TEST(VirtualFileSystemTest, MultipleWorkingDirs) {
// Our root contains a/aa, b/bb, c, where c is a link to a/.
// Run tests both in root/b/ and root/c/ (to test "normal" and symlink dirs).
// Interleave operations to show the working directories are independent.
TempDir Root("r", /*Unique*/ true);
TempDir ADir(Root.path("a"));
TempDir BDir(Root.path("b"));
TempLink C(ADir.path(), Root.path("c"));
TempFile AA(ADir.path("aa"), "", "aaaa");
TempFile BB(BDir.path("bb"), "", "bbbb");
std::unique_ptr<vfs::FileSystem> BFS = vfs::createPhysicalFileSystem(),
CFS = vfs::createPhysicalFileSystem();
ASSERT_FALSE(BFS->setCurrentWorkingDirectory(BDir.path()));
ASSERT_FALSE(CFS->setCurrentWorkingDirectory(C.path()));
EXPECT_EQ(BDir.path(), *BFS->getCurrentWorkingDirectory());
EXPECT_EQ(C.path(), *CFS->getCurrentWorkingDirectory());
// openFileForRead(), indirectly.
auto BBuf = BFS->getBufferForFile("bb");
ASSERT_TRUE(BBuf);
EXPECT_EQ("bbbb", (*BBuf)->getBuffer());
auto ABuf = CFS->getBufferForFile("aa");
ASSERT_TRUE(ABuf);
EXPECT_EQ("aaaa", (*ABuf)->getBuffer());
// status()
auto BStat = BFS->status("bb");
ASSERT_TRUE(BStat);
EXPECT_EQ("bb", BStat->getName());
auto AStat = CFS->status("aa");
ASSERT_TRUE(AStat);
EXPECT_EQ("aa", AStat->getName()); // unresolved name
// getRealPath()
SmallString<128> BPath;
ASSERT_FALSE(BFS->getRealPath("bb", BPath));
EXPECT_EQ(BB.path(), BPath);
SmallString<128> APath;
ASSERT_FALSE(CFS->getRealPath("aa", APath));
EXPECT_EQ(AA.path(), APath); // Reports resolved name.
// dir_begin
std::error_code EC;
auto BIt = BFS->dir_begin(".", EC);
ASSERT_FALSE(EC);
ASSERT_NE(BIt, vfs::directory_iterator());
EXPECT_EQ((BDir.path() + "/./bb").str(), BIt->path());
BIt.increment(EC);
ASSERT_FALSE(EC);
ASSERT_EQ(BIt, vfs::directory_iterator());
auto CIt = CFS->dir_begin(".", EC);
ASSERT_FALSE(EC);
ASSERT_NE(CIt, vfs::directory_iterator());
EXPECT_EQ((ADir.path() + "/./aa").str(),
CIt->path()); // Partly resolved name!
CIt.increment(EC); // Because likely to read through this path.
ASSERT_FALSE(EC);
ASSERT_EQ(CIt, vfs::directory_iterator());
}
TEST(VirtualFileSystemTest, BrokenSymlinkRealFSIteration) {
TempDir TestDirectory("virtual-file-system-test", /*Unique*/ true);
IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getRealFileSystem();
TempLink _a("no_such_file", TestDirectory.path("a"));
TempDir _b(TestDirectory.path("b"));
TempLink _c("no_such_file", TestDirectory.path("c"));
// Should get no iteration error, but a stat error for the broken symlinks.
std::map<std::string, std::error_code> StatResults;
std::error_code EC;
for (vfs::directory_iterator
I = FS->dir_begin(Twine(TestDirectory.path()), EC),
E;
I != E; I.increment(EC)) {
EXPECT_FALSE(EC);
StatResults[std::string(sys::path::filename(I->path()))] =
FS->status(I->path()).getError();
}
EXPECT_THAT(
StatResults,
ElementsAre(
Pair("a", std::make_error_code(std::errc::no_such_file_or_directory)),
Pair("b", std::error_code()),
Pair("c",
std::make_error_code(std::errc::no_such_file_or_directory))));
}
#endif
TEST(VirtualFileSystemTest, BasicRealFSRecursiveIteration) {
TempDir 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.path()), EC);
ASSERT_FALSE(EC);
EXPECT_EQ(vfs::recursive_directory_iterator(), I); // empty directory is empty
TempDir _a(TestDirectory.path("a"));
TempDir _ab(TestDirectory.path("a/b"));
TempDir _c(TestDirectory.path("c"));
TempDir _cd(TestDirectory.path("c/d"));
I = vfs::recursive_directory_iterator(*FS, Twine(TestDirectory.path()), 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(std::string(I->path()));
}
// 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
}
TEST(VirtualFileSystemTest, BasicRealFSRecursiveIterationNoPush) {
TempDir TestDirectory("virtual-file-system-test", /*Unique*/ true);
TempDir _a(TestDirectory.path("a"));
TempDir _ab(TestDirectory.path("a/b"));
TempDir _c(TestDirectory.path("c"));
TempDir _cd(TestDirectory.path("c/d"));
TempDir _e(TestDirectory.path("e"));
TempDir _ef(TestDirectory.path("e/f"));
TempDir _g(TestDirectory.path("g"));
IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getRealFileSystem();
// Test that calling no_push on entries without subdirectories has no effect.
{
std::error_code EC;
auto I =
vfs::recursive_directory_iterator(*FS, Twine(TestDirectory.path()), EC);
ASSERT_FALSE(EC);
std::vector<std::string> Contents;
for (auto E = vfs::recursive_directory_iterator(); !EC && I != E;
I.increment(EC)) {
Contents.push_back(std::string(I->path()));
char last = I->path().back();
switch (last) {
case 'b':
case 'd':
case 'f':
case 'g':
I.no_push();
break;
default:
break;
}
}
EXPECT_EQ(7U, Contents.size());
}
// Test that calling no_push skips subdirectories.
{
std::error_code EC;
auto I =
vfs::recursive_directory_iterator(*FS, Twine(TestDirectory.path()), EC);
ASSERT_FALSE(EC);
std::vector<std::string> Contents;
for (auto E = vfs::recursive_directory_iterator(); !EC && I != E;
I.increment(EC)) {
Contents.push_back(std::string(I->path()));
char last = I->path().back();
switch (last) {
case 'a':
case 'c':
case 'e':
I.no_push();
break;
default:
break;
}
}
// Check contents, which may be in any order
EXPECT_EQ(4U, Contents.size());
int Counts[7] = {0, 0, 0, 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 < 7);
Counts[Index]++;
}
EXPECT_EQ(1, Counts[0]); // a
EXPECT_EQ(0, Counts[1]); // b
EXPECT_EQ(1, Counts[2]); // c
EXPECT_EQ(0, Counts[3]); // d
EXPECT_EQ(1, Counts[4]); // e
EXPECT_EQ(0, Counts[5]); // f
EXPECT_EQ(1, Counts[6]); // g
}
}
#ifdef LLVM_ON_UNIX
TEST(VirtualFileSystemTest, BrokenSymlinkRealFSRecursiveIteration) {
TempDir TestDirectory("virtual-file-system-test", /*Unique*/ true);
IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getRealFileSystem();
TempLink _a("no_such_file", TestDirectory.path("a"));
TempDir _b(TestDirectory.path("b"));
TempLink _ba("no_such_file", TestDirectory.path("b/a"));
TempDir _bb(TestDirectory.path("b/b"));
TempLink _bc("no_such_file", TestDirectory.path("b/c"));
TempLink _c("no_such_file", TestDirectory.path("c"));
TempDir _d(TestDirectory.path("d"));
TempDir _dd(TestDirectory.path("d/d"));
TempDir _ddd(TestDirectory.path("d/d/d"));
TempLink _e("no_such_file", TestDirectory.path("e"));
std::vector<std::string> VisitedBrokenSymlinks;
std::vector<std::string> VisitedNonBrokenSymlinks;
std::error_code EC;
for (vfs::recursive_directory_iterator
I(*FS, Twine(TestDirectory.path()), EC),
E;
I != E; I.increment(EC)) {
EXPECT_FALSE(EC);
(FS->status(I->path()) ? VisitedNonBrokenSymlinks : VisitedBrokenSymlinks)
.push_back(std::string(I->path()));
}
// Check visited file names.
EXPECT_THAT(VisitedBrokenSymlinks,
UnorderedElementsAre(_a.path().str(), _ba.path().str(),
_bc.path().str(), _c.path().str(),
_e.path().str()));
EXPECT_THAT(VisitedNonBrokenSymlinks,
UnorderedElementsAre(_b.path().str(), _bb.path().str(),
_d.path().str(), _dd.path().str(),
_ddd.path().str()));
}
#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(std::string(I->path()));
llvm::sort(InputToCheck);
llvm::sort(Expected);
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");
Lower->addDirectory("/hiddenByMid");
Lower->addDirectory("/hiddenByUp");
Middle->addRegularFile("/onlyInMid");
Middle->addRegularFile("/hiddenByMid");
Middle->addDirectory("/hiddenByUp");
Upper->addRegularFile("/onlyInUp");
Upper->addRegularFile("/hiddenByUp");
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->path() == "/hiddenByUp")
break;
ASSERT_NE(E, I);
EXPECT_EQ(sys::fs::file_type::regular_file, I->type());
}
{
std::error_code EC;
vfs::directory_iterator I = O->dir_begin("/", EC), E;
for (; !EC && I != E; I.increment(EC))
if (I->path() == "/hiddenByMid")
break;
ASSERT_NE(E, I);
EXPECT_EQ(sys::fs::file_type::regular_file, I->type());
}
}
TEST(ProxyFileSystemTest, Basic) {
IntrusiveRefCntPtr<vfs::InMemoryFileSystem> Base(
new vfs::InMemoryFileSystem());
vfs::ProxyFileSystem PFS(Base);
Base->addFile("/a", 0, MemoryBuffer::getMemBuffer("test"));
auto Stat = PFS.status("/a");
ASSERT_FALSE(Stat.getError());
auto File = PFS.openFileForRead("/a");
ASSERT_FALSE(File.getError());
EXPECT_EQ("test", (*(*File)->getBuffer("ignored"))->getBuffer());
std::error_code EC;
vfs::directory_iterator I = PFS.dir_begin("/", EC);
ASSERT_FALSE(EC);
ASSERT_EQ("/a", I->path());
I.increment(EC);
ASSERT_FALSE(EC);
ASSERT_EQ(vfs::directory_iterator(), I);
ASSERT_FALSE(PFS.setCurrentWorkingDirectory("/"));
auto PWD = PFS.getCurrentWorkingDirectory();
ASSERT_FALSE(PWD.getError());
ASSERT_EQ("/", *PWD);
SmallString<16> Path;
ASSERT_FALSE(PFS.getRealPath("a", Path));
ASSERT_EQ("/a", Path);
bool Local = true;
ASSERT_FALSE(PFS.isLocal("/a", Local));
EXPECT_FALSE(Local);
}
class InMemoryFileSystemTest : public ::testing::Test {
protected:
llvm::vfs::InMemoryFileSystem FS;
llvm::vfs::InMemoryFileSystem NormalizedFS;
InMemoryFileSystemTest()
: FS(/*UseNormalizedPaths=*/false),
NormalizedFS(/*UseNormalizedPaths=*/true) {}
};
MATCHER_P2(IsHardLinkTo, FS, Target, "") {
StringRef From = arg;
StringRef To = Target;
auto OpenedFrom = FS->openFileForRead(From);
auto OpenedTo = FS->openFileForRead(To);
return !OpenedFrom.getError() && !OpenedTo.getError() &&
(*OpenedFrom)->status()->getUniqueID() ==
(*OpenedTo)->status()->getUniqueID();
}
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);
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->path());
I.increment(EC);
ASSERT_FALSE(EC);
ASSERT_EQ("/b", I->path());
I.increment(EC);
ASSERT_FALSE(EC);
ASSERT_EQ(vfs::directory_iterator(), I);
I = FS.dir_begin("/b", EC);
ASSERT_FALSE(EC);
// When on Windows, we end up with "/b\\c" as the name. Convert to Posix
// path for the sake of the comparison.
ASSERT_EQ("/b/c", getPosixPath(std::string(I->path())));
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("/b/c", Stat->getName());
ASSERT_EQ("/b", *FS.getCurrentWorkingDirectory());
Stat = FS.status("c");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
NormalizedFS.setCurrentWorkingDirectory("/b/c");
NormalizedFS.setCurrentWorkingDirectory(".");
ASSERT_EQ("/b/c",
getPosixPath(NormalizedFS.getCurrentWorkingDirectory().get()));
NormalizedFS.setCurrentWorkingDirectory("..");
ASSERT_EQ("/b",
getPosixPath(NormalizedFS.getCurrentWorkingDirectory().get()));
}
TEST_F(InMemoryFileSystemTest, IsLocal) {
FS.setCurrentWorkingDirectory("/b");
FS.addFile("c", 0, MemoryBuffer::getMemBuffer(""));
std::error_code EC;
bool IsLocal = true;
EC = FS.isLocal("c", IsLocal);
ASSERT_FALSE(EC);
ASSERT_FALSE(IsLocal);
}
#if !defined(_WIN32)
TEST_F(InMemoryFileSystemTest, GetRealPath) {
SmallString<16> Path;
EXPECT_EQ(FS.getRealPath("b", Path), errc::operation_not_permitted);
auto GetRealPath = [this](StringRef P) {
SmallString<16> Output;
auto EC = FS.getRealPath(P, Output);
EXPECT_FALSE(EC);
return std::string(Output);
};
FS.setCurrentWorkingDirectory("a");
EXPECT_EQ(GetRealPath("b"), "a/b");
EXPECT_EQ(GetRealPath("../b"), "b");
EXPECT_EQ(GetRealPath("b/./c"), "a/b/c");
FS.setCurrentWorkingDirectory("/a");
EXPECT_EQ(GetRealPath("b"), "/a/b");
EXPECT_EQ(GetRealPath("../b"), "/b");
EXPECT_EQ(GetRealPath("b/./c"), "/a/b/c");
}
#endif // _WIN32
TEST_F(InMemoryFileSystemTest, AddFileWithUser) {
FS.addFile("/a/b/c", 0, MemoryBuffer::getMemBuffer("abc"), 0xFEEDFACE);
auto Stat = FS.status("/a");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_TRUE(Stat->isDirectory());
ASSERT_EQ(0xFEEDFACE, Stat->getUser());
Stat = FS.status("/a/b");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_TRUE(Stat->isDirectory());
ASSERT_EQ(0xFEEDFACE, Stat->getUser());
Stat = FS.status("/a/b/c");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_TRUE(Stat->isRegularFile());
ASSERT_EQ(sys::fs::perms::all_all, Stat->getPermissions());
ASSERT_EQ(0xFEEDFACE, Stat->getUser());
}
TEST_F(InMemoryFileSystemTest, AddFileWithGroup) {
FS.addFile("/a/b/c", 0, MemoryBuffer::getMemBuffer("abc"), None, 0xDABBAD00);
auto Stat = FS.status("/a");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_TRUE(Stat->isDirectory());
ASSERT_EQ(0xDABBAD00, Stat->getGroup());
Stat = FS.status("/a/b");
ASSERT_TRUE(Stat->isDirectory());
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_EQ(0xDABBAD00, Stat->getGroup());
Stat = FS.status("/a/b/c");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_TRUE(Stat->isRegularFile());
ASSERT_EQ(sys::fs::perms::all_all, Stat->getPermissions());
ASSERT_EQ(0xDABBAD00, Stat->getGroup());
}
TEST_F(InMemoryFileSystemTest, AddFileWithFileType) {
FS.addFile("/a/b/c", 0, MemoryBuffer::getMemBuffer("abc"), None, None,
sys::fs::file_type::socket_file);
auto Stat = FS.status("/a");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_TRUE(Stat->isDirectory());
Stat = FS.status("/a/b");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_TRUE(Stat->isDirectory());
Stat = FS.status("/a/b/c");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_EQ(sys::fs::file_type::socket_file, Stat->getType());
ASSERT_EQ(sys::fs::perms::all_all, Stat->getPermissions());
}
TEST_F(InMemoryFileSystemTest, AddFileWithPerms) {
FS.addFile("/a/b/c", 0, MemoryBuffer::getMemBuffer("abc"), None, None, None,
sys::fs::perms::owner_read | sys::fs::perms::owner_write);
auto Stat = FS.status("/a");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_TRUE(Stat->isDirectory());
ASSERT_EQ(sys::fs::perms::owner_read | sys::fs::perms::owner_write |
sys::fs::perms::owner_exe,
Stat->getPermissions());
Stat = FS.status("/a/b");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_TRUE(Stat->isDirectory());
ASSERT_EQ(sys::fs::perms::owner_read | sys::fs::perms::owner_write |
sys::fs::perms::owner_exe,
Stat->getPermissions());
Stat = FS.status("/a/b/c");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_TRUE(Stat->isRegularFile());
ASSERT_EQ(sys::fs::perms::owner_read | sys::fs::perms::owner_write,
Stat->getPermissions());
}
TEST_F(InMemoryFileSystemTest, AddDirectoryThenAddChild) {
FS.addFile("/a", 0, MemoryBuffer::getMemBuffer(""), /*User=*/None,
/*Group=*/None, sys::fs::file_type::directory_file);
FS.addFile("/a/b", 0, MemoryBuffer::getMemBuffer("abc"), /*User=*/None,
/*Group=*/None, sys::fs::file_type::regular_file);
auto Stat = FS.status("/a");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_TRUE(Stat->isDirectory());
Stat = FS.status("/a/b");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n" << FS.toString();
ASSERT_TRUE(Stat->isRegularFile());
}
// Test that the name returned by status() is in the same form as the path that
// was requested (to match the behavior of RealFileSystem).
TEST_F(InMemoryFileSystemTest, StatusName) {
NormalizedFS.addFile("/a/b/c", 0, MemoryBuffer::getMemBuffer("abc"),
/*User=*/None,
/*Group=*/None, sys::fs::file_type::regular_file);
NormalizedFS.setCurrentWorkingDirectory("/a/b");
// Access using InMemoryFileSystem::status.
auto Stat = NormalizedFS.status("../b/c");
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n"
<< NormalizedFS.toString();
ASSERT_TRUE(Stat->isRegularFile());
ASSERT_EQ("../b/c", Stat->getName());
// Access using InMemoryFileAdaptor::status.
auto File = NormalizedFS.openFileForRead("../b/c");
ASSERT_FALSE(File.getError()) << File.getError() << "\n"
<< NormalizedFS.toString();
Stat = (*File)->status();
ASSERT_FALSE(Stat.getError()) << Stat.getError() << "\n"
<< NormalizedFS.toString();
ASSERT_TRUE(Stat->isRegularFile());
ASSERT_EQ("../b/c", Stat->getName());
// Access using a directory iterator.
std::error_code EC;
llvm::vfs::directory_iterator It = NormalizedFS.dir_begin("../b", EC);
// When on Windows, we end up with "../b\\c" as the name. Convert to Posix
// path for the sake of the comparison.
ASSERT_EQ("../b/c", getPosixPath(std::string(It->path())));
}
TEST_F(InMemoryFileSystemTest, AddHardLinkToFile) {
StringRef FromLink = "/path/to/FROM/link";
StringRef Target = "/path/to/TO/file";
FS.addFile(Target, 0, MemoryBuffer::getMemBuffer("content of target"));
EXPECT_TRUE(FS.addHardLink(FromLink, Target));
EXPECT_THAT(FromLink, IsHardLinkTo(&FS, Target));
EXPECT_TRUE(FS.status(FromLink)->getSize() == FS.status(Target)->getSize());
EXPECT_TRUE(FS.getBufferForFile(FromLink)->get()->getBuffer() ==
FS.getBufferForFile(Target)->get()->getBuffer());
}
TEST_F(InMemoryFileSystemTest, AddHardLinkInChainPattern) {
StringRef Link0 = "/path/to/0/link";
StringRef Link1 = "/path/to/1/link";
StringRef Link2 = "/path/to/2/link";
StringRef Target = "/path/to/target";
FS.addFile(Target, 0, MemoryBuffer::getMemBuffer("content of target file"));
EXPECT_TRUE(FS.addHardLink(Link2, Target));
EXPECT_TRUE(FS.addHardLink(Link1, Link2));
EXPECT_TRUE(FS.addHardLink(Link0, Link1));
EXPECT_THAT(Link0, IsHardLinkTo(&FS, Target));
EXPECT_THAT(Link1, IsHardLinkTo(&FS, Target));
EXPECT_THAT(Link2, IsHardLinkTo(&FS, Target));
}
TEST_F(InMemoryFileSystemTest, AddHardLinkToAFileThatWasNotAddedBefore) {
EXPECT_FALSE(FS.addHardLink("/path/to/link", "/path/to/target"));
}
TEST_F(InMemoryFileSystemTest, AddHardLinkFromAFileThatWasAddedBefore) {
StringRef Link = "/path/to/link";
StringRef Target = "/path/to/target";
FS.addFile(Target, 0, MemoryBuffer::getMemBuffer("content of target"));
FS.addFile(Link, 0, MemoryBuffer::getMemBuffer("content of link"));
EXPECT_FALSE(FS.addHardLink(Link, Target));
}
TEST_F(InMemoryFileSystemTest, AddSameHardLinkMoreThanOnce) {
StringRef Link = "/path/to/link";
StringRef Target = "/path/to/target";
FS.addFile(Target, 0, MemoryBuffer::getMemBuffer("content of target"));
EXPECT_TRUE(FS.addHardLink(Link, Target));
EXPECT_FALSE(FS.addHardLink(Link, Target));
}
TEST_F(InMemoryFileSystemTest, AddFileInPlaceOfAHardLinkWithSameContent) {
StringRef Link = "/path/to/link";
StringRef Target = "/path/to/target";
StringRef Content = "content of target";
EXPECT_TRUE(FS.addFile(Target, 0, MemoryBuffer::getMemBuffer(Content)));
EXPECT_TRUE(FS.addHardLink(Link, Target));
EXPECT_TRUE(FS.addFile(Link, 0, MemoryBuffer::getMemBuffer(Content)));
}
TEST_F(InMemoryFileSystemTest, AddFileInPlaceOfAHardLinkWithDifferentContent) {
StringRef Link = "/path/to/link";
StringRef Target = "/path/to/target";
StringRef Content = "content of target";
StringRef LinkContent = "different content of link";
EXPECT_TRUE(FS.addFile(Target, 0, MemoryBuffer::getMemBuffer(Content)));
EXPECT_TRUE(FS.addHardLink(Link, Target));
EXPECT_FALSE(FS.addFile(Link, 0, MemoryBuffer::getMemBuffer(LinkContent)));
}
TEST_F(InMemoryFileSystemTest, AddHardLinkToADirectory) {
StringRef Dir = "path/to/dummy/dir";
StringRef Link = "/path/to/link";
StringRef File = "path/to/dummy/dir/target";
StringRef Content = "content of target";
EXPECT_TRUE(FS.addFile(File, 0, MemoryBuffer::getMemBuffer(Content)));
EXPECT_FALSE(FS.addHardLink(Link, Dir));
}
TEST_F(InMemoryFileSystemTest, AddHardLinkFromADirectory) {
StringRef Dir = "path/to/dummy/dir";
StringRef Target = "path/to/dummy/dir/target";
StringRef Content = "content of target";
EXPECT_TRUE(FS.addFile(Target, 0, MemoryBuffer::getMemBuffer(Content)));
EXPECT_FALSE(FS.addHardLink(Dir, Target));
}
TEST_F(InMemoryFileSystemTest, AddHardLinkUnderAFile) {
StringRef CommonContent = "content string";
FS.addFile("/a/b", 0, MemoryBuffer::getMemBuffer(CommonContent));
FS.addFile("/c/d", 0, MemoryBuffer::getMemBuffer(CommonContent));
EXPECT_FALSE(FS.addHardLink("/c/d/e", "/a/b"));
}
TEST_F(InMemoryFileSystemTest, RecursiveIterationWithHardLink) {
std::error_code EC;
FS.addFile("/a/b", 0, MemoryBuffer::getMemBuffer("content string"));
EXPECT_TRUE(FS.addHardLink("/c/d", "/a/b"));
auto I = vfs::recursive_directory_iterator(FS, "/", EC);
ASSERT_FALSE(EC);
std::vector<std::string> Nodes;
for (auto E = vfs::recursive_directory_iterator(); !EC && I != E;
I.increment(EC)) {
Nodes.push_back(getPosixPath(std::string(I->path())));
}
EXPECT_THAT(Nodes, testing::UnorderedElementsAre("/a", "/a/b", "/c", "/c/d"));
}
// 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;
}
std::unique_ptr<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);
}
std::unique_ptr<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());
// duplicate keys
FS = getFromYAMLString("{ 'roots':[], 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLString(
"{ 'case-sensitive':'true', 'case-sensitive':'true', 'roots':[] }",
Lower);
EXPECT_EQ(nullptr, FS.get());
FS =
getFromYAMLString("{ 'roots':[{'name':'me', 'name':'you', 'type':'file', "
"'external-contents':'blah' } ] }",
Lower);
EXPECT_EQ(nullptr, FS.get());
// missing version
FS = getFromYAMLRawString("{ 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.get());
// bad version number
FS = getFromYAMLRawString("{ 'version':'foo', 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLRawString("{ 'version':-1, 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.get());
FS = getFromYAMLRawString("{ 'version':100000, 'roots':[] }", Lower);
EXPECT_EQ(nullptr, FS.get());
EXPECT_EQ(24, NumDiagnostics);
}
TEST_F(VFSFromYAMLTest, UseExternalName) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("//root/external/file");
IntrusiveRefCntPtr<vfs::FileSystem> FS =
getFromYAMLString("{ 'roots': [\n"
" { 'type': 'file', 'name': '//root/A',\n"
" 'external-contents': '//root/external/file'\n"
" },\n"
" { 'type': 'file', 'name': '//root/B',\n"
" 'use-external-name': true,\n"
" 'external-contents': '//root/external/file'\n"
" },\n"
" { 'type': 'file', 'name': '//root/C',\n"
" 'use-external-name': false,\n"
" 'external-contents': '//root/external/file'\n"
" }\n"
"] }",
Lower);
ASSERT_TRUE(nullptr != FS.get());
// default true
EXPECT_EQ("//root/external/file", FS->status("//root/A")->getName());
// explicit
EXPECT_EQ("//root/external/file", FS->status("//root/B")->getName());
EXPECT_EQ("//root/C", FS->status("//root/C")->getName());
// global configuration
FS = getFromYAMLString("{ 'use-external-names': false,\n"
" 'roots': [\n"
" { 'type': 'file', 'name': '//root/A',\n"
" 'external-contents': '//root/external/file'\n"
" },\n"
" { 'type': 'file', 'name': '//root/B',\n"
" 'use-external-name': true,\n"
" 'external-contents': '//root/external/file'\n"
" },\n"
" { 'type': 'file', 'name': '//root/C',\n"
" 'use-external-name': false,\n"
" 'external-contents': '//root/external/file'\n"
" }\n"
"] }",
Lower);
ASSERT_TRUE(nullptr != FS.get());
// default
EXPECT_EQ("//root/A", FS->status("//root/A")->getName());
// explicit
EXPECT_EQ("//root/external/file", FS->status("//root/B")->getName());
EXPECT_EQ("//root/C", FS->status("//root/C")->getName());
}
TEST_F(VFSFromYAMLTest, MultiComponentPath) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("//root/other");
// file in roots
IntrusiveRefCntPtr<vfs::FileSystem> FS =
getFromYAMLString("{ 'roots': [\n"
" { 'type': 'file', 'name': '//root/path/to/file',\n"
" 'external-contents': '//root/other' }]\n"
"}",
Lower);
ASSERT_TRUE(nullptr != FS.get());
EXPECT_FALSE(FS->status("//root/path/to/file").getError());
EXPECT_FALSE(FS->status("//root/path/to").getError());
EXPECT_FALSE(FS->status("//root/path").getError());
EXPECT_FALSE(FS->status("//root/").getError());
// at the start
FS = getFromYAMLString(
"{ 'roots': [\n"
" { 'type': 'directory', 'name': '//root/path/to',\n"
" 'contents': [ { 'type': 'file', 'name': 'file',\n"
" 'external-contents': '//root/other' }]}]\n"
"}",
Lower);
ASSERT_TRUE(nullptr != FS.get());
EXPECT_FALSE(FS->status("//root/path/to/file").getError());
EXPECT_FALSE(FS->status("//root/path/to").getError());
EXPECT_FALSE(FS->status("//root/path").getError());
EXPECT_FALSE(FS->status("//root/").getError());
// at the end
FS = getFromYAMLString(
"{ 'roots': [\n"
" { 'type': 'directory', 'name': '//root/',\n"
" 'contents': [ { 'type': 'file', 'name': 'path/to/file',\n"
" 'external-contents': '//root/other' }]}]\n"
"}",
Lower);
ASSERT_TRUE(nullptr != FS.get());
EXPECT_FALSE(FS->status("//root/path/to/file").getError());
EXPECT_FALSE(FS->status("//root/path/to").getError());
EXPECT_FALSE(FS->status("//root/path").getError());
EXPECT_FALSE(FS->status("//root/").getError());
}
TEST_F(VFSFromYAMLTest, TrailingSlashes) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addRegularFile("//root/other");
// file in roots
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'roots': [\n"
" { 'type': 'directory', 'name': '//root/path/to////',\n"
" 'contents': [ { 'type': 'file', 'name': 'file',\n"
" 'external-contents': '//root/other' }]}]\n"
"}",
Lower);
ASSERT_TRUE(nullptr != FS.get());
EXPECT_FALSE(FS->status("//root/path/to/file").getError());
EXPECT_FALSE(FS->status("//root/path/to").getError());
EXPECT_FALSE(FS->status("//root/path").getError());
EXPECT_FALSE(FS->status("//root/").getError());
}
TEST_F(VFSFromYAMLTest, DirectoryIteration) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addDirectory("//root/");
Lower->addDirectory("//root/foo");
Lower->addDirectory("//root/foo/bar");
Lower->addRegularFile("//root/foo/bar/a");
Lower->addRegularFile("//root/foo/bar/b");
Lower->addRegularFile("//root/file3");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'use-external-names': false,\n"
" '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/bar/b'\n"
" }\n"
" ]\n"
"}\n"
"]\n"
"}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(FS);
std::error_code EC;
checkContents(O->dir_begin("//root/", EC),
{"//root/file1", "//root/file2", "//root/file3", "//root/foo"});
checkContents(O->dir_begin("//root/foo/bar", EC),
{"//root/foo/bar/a", "//root/foo/bar/b"});
}
TEST_F(VFSFromYAMLTest, DirectoryIterationSameDirMultipleEntries) {
// https://llvm.org/bugs/show_bug.cgi?id=27725
if (!supportsSameDirMultipleYAMLEntries())
return;
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addDirectory("//root/zab");
Lower->addDirectory("//root/baz");
Lower->addRegularFile("//root/zab/a");
Lower->addRegularFile("//root/zab/b");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'use-external-names': false,\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/baz/',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'x',\n"
" 'external-contents': '//root/zab/a'\n"
" }\n"
" ]\n"
"},\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/baz/',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'y',\n"
" 'external-contents': '//root/zab/b'\n"
" }\n"
" ]\n"
"}\n"
"]\n"
"}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(FS);
std::error_code EC;
checkContents(O->dir_begin("//root/baz/", EC),
{"//root/baz/x", "//root/baz/y"});
}
TEST_F(VFSFromYAMLTest, RecursiveDirectoryIterationLevel) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addDirectory("//root/a");
Lower->addDirectory("//root/a/b");
Lower->addDirectory("//root/a/b/c");
Lower->addRegularFile("//root/a/b/c/file");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'use-external-names': false,\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/a/b/c/',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'file',\n"
" 'external-contents': '//root/a/b/c/file'\n"
" }\n"
" ]\n"
"},\n"
"]\n"
"}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
new vfs::OverlayFileSystem(Lower));
O->pushOverlay(FS);
std::error_code EC;
// Test recursive_directory_iterator level()
vfs::recursive_directory_iterator I = vfs::recursive_directory_iterator(
*O, "//root", EC),
E;
ASSERT_FALSE(EC);
for (int l = 0; I != E; I.increment(EC), ++l) {
ASSERT_FALSE(EC);
EXPECT_EQ(I.level(), l);
}
EXPECT_EQ(I, E);
}
TEST_F(VFSFromYAMLTest, RelativePaths) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
// Filename at root level without a parent directory.
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'roots': [\n"
" { 'type': 'file', 'name': 'file-not-in-directory.h',\n"
" 'external-contents': '//root/external/file'\n"
" }\n"
"] }",
Lower);
EXPECT_EQ(nullptr, FS.get());
// Relative file path.
FS = getFromYAMLString("{ 'roots': [\n"
" { 'type': 'file', 'name': 'relative/file/path.h',\n"
" 'external-contents': '//root/external/file'\n"
" }\n"
"] }",
Lower);
EXPECT_EQ(nullptr, FS.get());
// Relative directory path.
FS = getFromYAMLString(
"{ 'roots': [\n"
" { 'type': 'directory', 'name': 'relative/directory/path.h',\n"
" 'contents': []\n"
" }\n"
"] }",
Lower);
EXPECT_EQ(nullptr, FS.get());
EXPECT_EQ(3, NumDiagnostics);
}
TEST_F(VFSFromYAMLTest, NonFallthroughDirectoryIteration) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addDirectory("//root/");
Lower->addRegularFile("//root/a");
Lower->addRegularFile("//root/b");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'use-external-names': false,\n"
" 'fallthrough': false,\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'c',\n"
" 'external-contents': '//root/a'\n"
" }\n"
" ]\n"
"}\n"
"]\n"
"}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
std::error_code EC;
checkContents(FS->dir_begin("//root/", EC),
{"//root/c"});
}
TEST_F(VFSFromYAMLTest, DirectoryIterationWithDuplicates) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addDirectory("//root/");
Lower->addRegularFile("//root/a");
Lower->addRegularFile("//root/b");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'use-external-names': false,\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'a',\n"
" 'external-contents': '//root/a'\n"
" }\n"
" ]\n"
"}\n"
"]\n"
"}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
std::error_code EC;
checkContents(FS->dir_begin("//root/", EC),
{"//root/a", "//root/b"});
}
TEST_F(VFSFromYAMLTest, DirectoryIterationErrorInVFSLayer) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addDirectory("//root/");
Lower->addDirectory("//root/foo");
Lower->addRegularFile("//root/foo/a");
Lower->addRegularFile("//root/foo/b");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'use-external-names': false,\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'bar/a',\n"
" 'external-contents': '//root/foo/a'\n"
" }\n"
" ]\n"
"}\n"
"]\n"
"}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
std::error_code EC;
checkContents(FS->dir_begin("//root/foo", EC),
{"//root/foo/a", "//root/foo/b"});
}
TEST_F(VFSFromYAMLTest, GetRealPath) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addDirectory("//dir/");
Lower->addRegularFile("/foo");
Lower->addSymlink("/link");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'use-external-names': false,\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'bar',\n"
" 'external-contents': '/link'\n"
" }\n"
" ]\n"
"},\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//dir/',\n"
" 'contents': []\n"
"}\n"
"]\n"
"}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
// Regular file present in underlying file system.
SmallString<16> RealPath;
EXPECT_FALSE(FS->getRealPath("/foo", RealPath));
EXPECT_EQ(RealPath.str(), "/foo");
// File present in YAML pointing to symlink in underlying file system.
EXPECT_FALSE(FS->getRealPath("//root/bar", RealPath));
EXPECT_EQ(RealPath.str(), "/symlink");
// Directories should fall back to the underlying file system is possible.
EXPECT_FALSE(FS->getRealPath("//dir/", RealPath));
EXPECT_EQ(RealPath.str(), "//dir/");
// Try a non-existing file.
EXPECT_EQ(FS->getRealPath("/non_existing", RealPath),
errc::no_such_file_or_directory);
}
TEST_F(VFSFromYAMLTest, WorkingDirectory) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addDirectory("//root/");
Lower->addDirectory("//root/foo");
Lower->addRegularFile("//root/foo/a");
Lower->addRegularFile("//root/foo/b");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'use-external-names': false,\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/bar',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'a',\n"
" 'external-contents': '//root/foo/a'\n"
" }\n"
" ]\n"
"}\n"
"]\n"
"}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
std::error_code EC = FS->setCurrentWorkingDirectory("//root/bar");
ASSERT_FALSE(EC);
llvm::ErrorOr<std::string> WorkingDir = FS->getCurrentWorkingDirectory();
ASSERT_TRUE(WorkingDir);
EXPECT_EQ(*WorkingDir, "//root/bar");
llvm::ErrorOr<vfs::Status> Status = FS->status("./a");
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());
EC = FS->setCurrentWorkingDirectory("bogus");
ASSERT_TRUE(EC);
WorkingDir = FS->getCurrentWorkingDirectory();
ASSERT_TRUE(WorkingDir);
EXPECT_EQ(*WorkingDir, "//root/bar");
EC = FS->setCurrentWorkingDirectory("//root/");
ASSERT_FALSE(EC);
WorkingDir = FS->getCurrentWorkingDirectory();
ASSERT_TRUE(WorkingDir);
EXPECT_EQ(*WorkingDir, "//root/");
EC = FS->setCurrentWorkingDirectory("bar");
ASSERT_FALSE(EC);
WorkingDir = FS->getCurrentWorkingDirectory();
ASSERT_TRUE(WorkingDir);
EXPECT_EQ(*WorkingDir, "//root/bar");
}
TEST_F(VFSFromYAMLTest, WorkingDirectoryFallthrough) {
IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
Lower->addDirectory("//root/");
Lower->addDirectory("//root/foo");
Lower->addRegularFile("//root/foo/a");
Lower->addRegularFile("//root/foo/b");
Lower->addRegularFile("//root/c");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'use-external-names': false,\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/bar',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'a',\n"
" 'external-contents': '//root/foo/a'\n"
" }\n"
" ]\n"
"},\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/bar/baz',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'a',\n"
" 'external-contents': '//root/foo/a'\n"
" }\n"
" ]\n"
"}\n"
"]\n"
"}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
std::error_code EC = FS->setCurrentWorkingDirectory("//root/");
ASSERT_FALSE(EC);
ASSERT_TRUE(FS.get() != nullptr);
llvm::ErrorOr<vfs::Status> Status = FS->status("bar/a");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->exists());
Status = FS->status("foo/a");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->exists());
EC = FS->setCurrentWorkingDirectory("//root/bar");
ASSERT_FALSE(EC);
Status = FS->status("./a");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->exists());
Status = FS->status("./b");
ASSERT_TRUE(Status.getError());
Status = FS->status("./c");
ASSERT_TRUE(Status.getError());
EC = FS->setCurrentWorkingDirectory("//root/");
ASSERT_FALSE(EC);
Status = FS->status("c");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->exists());
Status = FS->status("./bar/baz/a");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->exists());
EC = FS->setCurrentWorkingDirectory("//root/bar");
ASSERT_FALSE(EC);
Status = FS->status("./baz/a");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->exists());
Status = FS->status("../bar/baz/a");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->exists());
}
TEST_F(VFSFromYAMLTest, WorkingDirectoryFallthroughInvalid) {
IntrusiveRefCntPtr<ErrorDummyFileSystem> Lower(new ErrorDummyFileSystem());
Lower->addDirectory("//root/");
Lower->addDirectory("//root/foo");
Lower->addRegularFile("//root/foo/a");
Lower->addRegularFile("//root/foo/b");
Lower->addRegularFile("//root/c");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'use-external-names': false,\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/bar',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'a',\n"
" 'external-contents': '//root/foo/a'\n"
" }\n"
" ]\n"
"}\n"
"]\n"
"}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
std::error_code EC = FS->setCurrentWorkingDirectory("//root/");
ASSERT_FALSE(EC);
ASSERT_TRUE(FS.get() != nullptr);
llvm::ErrorOr<vfs::Status> Status = FS->status("bar/a");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->exists());
Status = FS->status("foo/a");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->exists());
}
TEST_F(VFSFromYAMLTest, VirtualWorkingDirectory) {
IntrusiveRefCntPtr<ErrorDummyFileSystem> Lower(new ErrorDummyFileSystem());
Lower->addDirectory("//root/");
Lower->addDirectory("//root/foo");
Lower->addRegularFile("//root/foo/a");
Lower->addRegularFile("//root/foo/b");
Lower->addRegularFile("//root/c");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
"{ 'use-external-names': false,\n"
" 'roots': [\n"
"{\n"
" 'type': 'directory',\n"
" 'name': '//root/bar',\n"
" 'contents': [ {\n"
" 'type': 'file',\n"
" 'name': 'a',\n"
" 'external-contents': '//root/foo/a'\n"
" }\n"
" ]\n"
"}\n"
"]\n"
"}",
Lower);
ASSERT_TRUE(FS.get() != nullptr);
std::error_code EC = FS->setCurrentWorkingDirectory("//root/bar");
ASSERT_FALSE(EC);
ASSERT_TRUE(FS.get() != nullptr);
llvm::ErrorOr<vfs::Status> Status = FS->status("a");
ASSERT_FALSE(Status.getError());
EXPECT_TRUE(Status->exists());
}
TEST_F(VFSFromYAMLTest, YAMLVFSWriterTest) {
TempDir TestDirectory("virtual-file-system-test", /*Unique*/ true);
TempDir _a(TestDirectory.path("a"));
TempFile _ab(TestDirectory.path("a, b"));
TempDir _c(TestDirectory.path("c"));
TempFile _cd(TestDirectory.path("c/d"));
TempDir _e(TestDirectory.path("e"));
TempDir _ef(TestDirectory.path("e/f"));
TempFile _g(TestDirectory.path("g"));
TempDir _h(TestDirectory.path("h"));
vfs::YAMLVFSWriter VFSWriter;
VFSWriter.addDirectoryMapping(_a.path(), "//root/a");
VFSWriter.addFileMapping(_ab.path(), "//root/a/b");
VFSWriter.addFileMapping(_cd.path(), "//root/c/d");
VFSWriter.addDirectoryMapping(_e.path(), "//root/e");
VFSWriter.addDirectoryMapping(_ef.path(), "//root/e/f");
VFSWriter.addFileMapping(_g.path(), "//root/g");
VFSWriter.addDirectoryMapping(_h.path(), "//root/h");
std::string Buffer;
raw_string_ostream OS(Buffer);
VFSWriter.write(OS);
OS.flush();
IntrusiveRefCntPtr<ErrorDummyFileSystem> Lower(new ErrorDummyFileSystem());
Lower->addDirectory("//root/");
Lower->addDirectory("//root/a");
Lower->addRegularFile("//root/a/b");
Lower->addDirectory("//root/b");
Lower->addDirectory("//root/c");
Lower->addRegularFile("//root/c/d");
Lower->addDirectory("//root/e");
Lower->addDirectory("//root/e/f");
Lower->addRegularFile("//root/g");
Lower->addDirectory("//root/h");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLRawString(Buffer, Lower);
ASSERT_TRUE(FS.get() != nullptr);
EXPECT_TRUE(FS->exists(_a.path()));
EXPECT_TRUE(FS->exists(_ab.path()));
EXPECT_TRUE(FS->exists(_c.path()));
EXPECT_TRUE(FS->exists(_cd.path()));
EXPECT_TRUE(FS->exists(_e.path()));
EXPECT_TRUE(FS->exists(_ef.path()));
EXPECT_TRUE(FS->exists(_g.path()));
EXPECT_TRUE(FS->exists(_h.path()));
}
TEST_F(VFSFromYAMLTest, YAMLVFSWriterTest2) {
TempDir TestDirectory("virtual-file-system-test", /*Unique*/ true);
TempDir _a(TestDirectory.path("a"));
TempFile _ab(TestDirectory.path("a/b"));
TempDir _ac(TestDirectory.path("a/c"));
TempFile _acd(TestDirectory.path("a/c/d"));
TempFile _ace(TestDirectory.path("a/c/e"));
TempFile _acf(TestDirectory.path("a/c/f"));
TempDir _ag(TestDirectory.path("a/g"));
TempFile _agh(TestDirectory.path("a/g/h"));
vfs::YAMLVFSWriter VFSWriter;
VFSWriter.addDirectoryMapping(_a.path(), "//root/a");
VFSWriter.addFileMapping(_ab.path(), "//root/a/b");
VFSWriter.addDirectoryMapping(_ac.path(), "//root/a/c");
VFSWriter.addFileMapping(_acd.path(), "//root/a/c/d");
VFSWriter.addFileMapping(_ace.path(), "//root/a/c/e");
VFSWriter.addFileMapping(_acf.path(), "//root/a/c/f");
VFSWriter.addDirectoryMapping(_ag.path(), "//root/a/g");
VFSWriter.addFileMapping(_agh.path(), "//root/a/g/h");
std::string Buffer;
raw_string_ostream OS(Buffer);
VFSWriter.write(OS);
OS.flush();
IntrusiveRefCntPtr<ErrorDummyFileSystem> Lower(new ErrorDummyFileSystem());
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLRawString(Buffer, Lower);
EXPECT_TRUE(FS.get() != nullptr);
}
TEST_F(VFSFromYAMLTest, YAMLVFSWriterTest3) {
TempDir TestDirectory("virtual-file-system-test", /*Unique*/ true);
TempDir _a(TestDirectory.path("a"));
TempFile _ab(TestDirectory.path("a/b"));
TempDir _ac(TestDirectory.path("a/c"));
TempDir _acd(TestDirectory.path("a/c/d"));
TempDir _acde(TestDirectory.path("a/c/d/e"));
TempFile _acdef(TestDirectory.path("a/c/d/e/f"));
TempFile _acdeg(TestDirectory.path("a/c/d/e/g"));
TempDir _ah(TestDirectory.path("a/h"));
TempFile _ahi(TestDirectory.path("a/h/i"));
vfs::YAMLVFSWriter VFSWriter;
VFSWriter.addDirectoryMapping(_a.path(), "//root/a");
VFSWriter.addFileMapping(_ab.path(), "//root/a/b");
VFSWriter.addDirectoryMapping(_ac.path(), "//root/a/c");
VFSWriter.addDirectoryMapping(_acd.path(), "//root/a/c/d");
VFSWriter.addDirectoryMapping(_acde.path(), "//root/a/c/d/e");
VFSWriter.addFileMapping(_acdef.path(), "//root/a/c/d/e/f");
VFSWriter.addFileMapping(_acdeg.path(), "//root/a/c/d/e/g");
VFSWriter.addDirectoryMapping(_ahi.path(), "//root/a/h");
VFSWriter.addFileMapping(_ahi.path(), "//root/a/h/i");
std::string Buffer;
raw_string_ostream OS(Buffer);
VFSWriter.write(OS);
OS.flush();
IntrusiveRefCntPtr<ErrorDummyFileSystem> Lower(new ErrorDummyFileSystem());
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLRawString(Buffer, Lower);
EXPECT_TRUE(FS.get() != nullptr);
}
TEST_F(VFSFromYAMLTest, YAMLVFSWriterTestHandleDirs) {
TempDir TestDirectory("virtual-file-system-test", /*Unique*/ true);
TempDir _a(TestDirectory.path("a"));
TempDir _b(TestDirectory.path("b"));
TempDir _c(TestDirectory.path("c"));
vfs::YAMLVFSWriter VFSWriter;
VFSWriter.addDirectoryMapping(_a.path(), "//root/a");
VFSWriter.addDirectoryMapping(_b.path(), "//root/b");
VFSWriter.addDirectoryMapping(_c.path(), "//root/c");
std::string Buffer;
raw_string_ostream OS(Buffer);
VFSWriter.write(OS);
OS.flush();
// We didn't add a single file - only directories.
EXPECT_TRUE(Buffer.find("'type': 'file'") == std::string::npos);
IntrusiveRefCntPtr<ErrorDummyFileSystem> Lower(new ErrorDummyFileSystem());
Lower->addDirectory("//root/a");
Lower->addDirectory("//root/b");
Lower->addDirectory("//root/c");
// canaries
Lower->addRegularFile("//root/a/a");
Lower->addRegularFile("//root/b/b");
Lower->addRegularFile("//root/c/c");
IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLRawString(Buffer, Lower);
ASSERT_TRUE(FS.get() != nullptr);
EXPECT_FALSE(FS->exists(_a.path("a")));
EXPECT_FALSE(FS->exists(_b.path("b")));
EXPECT_FALSE(FS->exists(_c.path("c")));
}
TEST(VFSFromRemappedFilesTest, Basic) {
IntrusiveRefCntPtr<vfs::InMemoryFileSystem> BaseFS =
new vfs::InMemoryFileSystem;
BaseFS->addFile("//root/b", 0, MemoryBuffer::getMemBuffer("contents of b"));
BaseFS->addFile("//root/c", 0, MemoryBuffer::getMemBuffer("contents of c"));
std::vector<std::pair<std::string, std::string>> RemappedFiles = {
{"//root/a/a", "//root/b"},
{"//root/a/b/c", "//root/c"},
};
auto RemappedFS = vfs::RedirectingFileSystem::create(
RemappedFiles, /*UseExternalNames=*/false, *BaseFS);
auto StatA = RemappedFS->status("//root/a/a");
auto StatB = RemappedFS->status("//root/a/b/c");
ASSERT_TRUE(StatA);
ASSERT_TRUE(StatB);
EXPECT_EQ("//root/a/a", StatA->getName());
EXPECT_EQ("//root/a/b/c", StatB->getName());
auto BufferA = RemappedFS->getBufferForFile("//root/a/a");
auto BufferB = RemappedFS->getBufferForFile("//root/a/b/c");
ASSERT_TRUE(BufferA);
ASSERT_TRUE(BufferB);
EXPECT_EQ("contents of b", (*BufferA)->getBuffer());
EXPECT_EQ("contents of c", (*BufferB)->getBuffer());
}
TEST(VFSFromRemappedFilesTest, UseExternalNames) {
IntrusiveRefCntPtr<vfs::InMemoryFileSystem> BaseFS =
new vfs::InMemoryFileSystem;
BaseFS->addFile("//root/b", 0, MemoryBuffer::getMemBuffer("contents of b"));
BaseFS->addFile("//root/c", 0, MemoryBuffer::getMemBuffer("contents of c"));
std::vector<std::pair<std::string, std::string>> RemappedFiles = {
{"//root/a/a", "//root/b"},
{"//root/a/b/c", "//root/c"},
};
auto RemappedFS = vfs::RedirectingFileSystem::create(
RemappedFiles, /*UseExternalNames=*/true, *BaseFS);
auto StatA = RemappedFS->status("//root/a/a");
auto StatB = RemappedFS->status("//root/a/b/c");
ASSERT_TRUE(StatA);
ASSERT_TRUE(StatB);
EXPECT_EQ("//root/b", StatA->getName());
EXPECT_EQ("//root/c", StatB->getName());
auto BufferA = RemappedFS->getBufferForFile("//root/a/a");
auto BufferB = RemappedFS->getBufferForFile("//root/a/b/c");
ASSERT_TRUE(BufferA);
ASSERT_TRUE(BufferB);
EXPECT_EQ("contents of b", (*BufferA)->getBuffer());
EXPECT_EQ("contents of c", (*BufferB)->getBuffer());
}
TEST(VFSFromRemappedFilesTest, LastMappingWins) {
IntrusiveRefCntPtr<vfs::InMemoryFileSystem> BaseFS =
new vfs::InMemoryFileSystem;
BaseFS->addFile("//root/b", 0, MemoryBuffer::getMemBuffer("contents of b"));
BaseFS->addFile("//root/c", 0, MemoryBuffer::getMemBuffer("contents of c"));
std::vector<std::pair<std::string, std::string>> RemappedFiles = {
{"//root/a", "//root/b"},
{"//root/a", "//root/c"},
};
auto RemappedFSKeepName = vfs::RedirectingFileSystem::create(
RemappedFiles, /*UseExternalNames=*/false, *BaseFS);
auto RemappedFSExternalName = vfs::RedirectingFileSystem::create(
RemappedFiles, /*UseExternalNames=*/true, *BaseFS);
auto StatKeepA = RemappedFSKeepName->status("//root/a");
auto StatExternalA = RemappedFSExternalName->status("//root/a");
ASSERT_TRUE(StatKeepA);
ASSERT_TRUE(StatExternalA);
EXPECT_EQ("//root/a", StatKeepA->getName());
EXPECT_EQ("//root/c", StatExternalA->getName());
auto BufferKeepA = RemappedFSKeepName->getBufferForFile("//root/a");
auto BufferExternalA = RemappedFSExternalName->getBufferForFile("//root/a");
ASSERT_TRUE(BufferKeepA);
ASSERT_TRUE(BufferExternalA);
EXPECT_EQ("contents of c", (*BufferKeepA)->getBuffer());
EXPECT_EQ("contents of c", (*BufferExternalA)->getBuffer());
}