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[Support] Test directory iterators and recursive directory iterators with broken symlinks.

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This commit adds a unit test to the file system tests to verify the behavior of
the directory iterator and recursive directory iterator with broken symlinks.

This test is Unix only.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297669 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Juergen Ributzka 2017-03-13 21:34:07 +00:00
parent d0188c3d44
commit bea1e20cb9
1 changed files with 78 additions and 0 deletions
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78
unittests/Support/Path.cpp
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@ -778,6 +778,84 @@ TEST_F(FileSystemTest, DirectoryIteration) {
ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/reclevel"));
}
#ifdef LLVM_ON_UNIX
TEST_F(FileSystemTest, BrokenSymlinkDirectoryIteration) {
// Create a known hierarchy to recurse over.
ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory) + "/symlink"));
ASSERT_NO_ERROR(
fs::create_link("no_such_file", Twine(TestDirectory) + "/symlink/a"));
ASSERT_NO_ERROR(
fs::create_directories(Twine(TestDirectory) + "/symlink/b/bb"));
ASSERT_NO_ERROR(
fs::create_link("no_such_file", Twine(TestDirectory) + "/symlink/b/ba"));
ASSERT_NO_ERROR(
fs::create_link("no_such_file", Twine(TestDirectory) + "/symlink/b/bc"));
ASSERT_NO_ERROR(
fs::create_link("no_such_file", Twine(TestDirectory) + "/symlink/c"));
ASSERT_NO_ERROR(
fs::create_directories(Twine(TestDirectory) + "/symlink/d/dd/ddd"));
ASSERT_NO_ERROR(fs::create_link(Twine(TestDirectory) + "/symlink/d/dd",
Twine(TestDirectory) + "/symlink/d/da"));
ASSERT_NO_ERROR(
fs::create_link("no_such_file", Twine(TestDirectory) + "/symlink/e"));
typedef std::vector<std::string> v_t;
v_t visited;
// The directory iterator doesn't stat the file, so we should be able to
// iterate over the whole directory.
std::error_code ec;
for (fs::directory_iterator i(Twine(TestDirectory) + "/symlink", ec), e;
i != e; i.increment(ec)) {
ASSERT_NO_ERROR(ec);
visited.push_back(path::filename(i->path()));
}
std::sort(visited.begin(), visited.end());
v_t expected = {"a", "b", "c", "d", "e"};
ASSERT_TRUE(visited.size() == expected.size());
ASSERT_TRUE(std::equal(visited.begin(), visited.end(), expected.begin()));
visited.clear();
// The recursive directory iterator has to stat the file, so we need to skip
// the broken symlinks.
for (fs::recursive_directory_iterator
i(Twine(TestDirectory) + "/symlink", ec),
e;
i != e; i.increment(ec)) {
ASSERT_NO_ERROR(ec);
fs::file_status status;
if (i->status(status) == std::errc::no_such_file_or_directory) {
i.no_push();
continue;
}
visited.push_back(path::filename(i->path()));
}
std::sort(visited.begin(), visited.end());
expected = {"b", "bb", "d", "da", "dd", "ddd", "ddd"};
ASSERT_TRUE(visited.size() == expected.size());
ASSERT_TRUE(std::equal(visited.begin(), visited.end(), expected.begin()));
visited.clear();
// This recursive directory iterator doesn't follow symlinks, so we don't need
// to skip them.
for (fs::recursive_directory_iterator
i(Twine(TestDirectory) + "/symlink", ec, /*follow_symlinks=*/false),
e;
i != e; i.increment(ec)) {
ASSERT_NO_ERROR(ec);
visited.push_back(path::filename(i->path()));
}
expected = {"a", "b", "ba", "bb", "bc", "c", "d", "da", "dd", "ddd", "e"};
ASSERT_TRUE(visited.size() == expected.size());
ASSERT_TRUE(std::equal(visited.begin(), visited.end(), expected.begin()));
ASSERT_NO_ERROR(fs::remove_directories(Twine(TestDirectory) + "/symlink"));
}
#endif
TEST_F(FileSystemTest, Remove) {
SmallString<64> BaseDir;
SmallString<64> Paths[4];