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base / files / block_tests_writing_to_special_dirs.cc [blame]
// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/files/block_tests_writing_to_special_dirs.h"
#include <utility>
#include "base/files/file_path.h"
#include "base/no_destructor.h"
#include "base/path_service.h"
namespace base {
// static
std::optional<BlockTestsWritingToSpecialDirs>&
BlockTestsWritingToSpecialDirs::Get() {
static NoDestructor<std::optional<BlockTestsWritingToSpecialDirs>>
block_tests_writing_to_special_dirs;
return *block_tests_writing_to_special_dirs;
}
// static
bool BlockTestsWritingToSpecialDirs::CanWriteToPath(const FilePath& path) {
auto& dir_blocker = Get();
if (!dir_blocker.has_value()) {
return true;
}
if (!dir_blocker->blocked_dirs_.empty()) {
// `blocked_paths_` needs to be initialized lazily because PathService::Get
// can't be called from the test harness code before the indiviudal tests
// run. On Windows, calling PathService::Get in the test harness startup
// codel causes user32.dll to get loaded, which breaks delayload_unittests.
// On the Mac, it triggers a change in `AmIBundled`.
for (const int dir_key : dir_blocker->blocked_dirs_) {
// If test infrastructure has overridden `dir_key` already, there is no
// need to block writes to it. Android tests apparently do this.
if (PathService::IsOverriddenForTesting(dir_key)) {
continue;
}
FilePath path_to_block;
// Sandbox can make PathService::Get fail.
if (PathService::Get(dir_key, &path_to_block)) {
dir_blocker->blocked_paths_.insert(std::move(path_to_block));
}
}
dir_blocker->blocked_dirs_.clear();
}
for (const auto& path_to_block : dir_blocker->blocked_paths_) {
if (path_to_block.IsParent(path)) {
(*dir_blocker->failure_callback_)(path);
return false;
}
}
return true;
}
BlockTestsWritingToSpecialDirs::BlockTestsWritingToSpecialDirs(
std::vector<int> blocked_dirs,
FileWriteBlockedForTestingFunctionPtr failure_callback)
: blocked_dirs_(std::move(blocked_dirs)),
failure_callback_(failure_callback) {}
BlockTestsWritingToSpecialDirs::~BlockTestsWritingToSpecialDirs() = default;
} // namespace base