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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include <vector>
#include "gtest/gtest.h"
#include "flutter/fml/build_config.h"
#include "flutter/fml/file.h"
#include "flutter/fml/mapping.h"
#include "flutter/fml/paths.h"
#include "flutter/fml/unique_fd.h"
static bool WriteStringToFile(const fml::UniqueFD& fd,
const std::string& contents) {
if (!fml::TruncateFile(fd, contents.size())) {
return false;
}
fml::FileMapping mapping(fd, {fml::FileMapping::Protection::kWrite});
if (mapping.GetSize() != contents.size()) {
return false;
}
if (mapping.GetMutableMapping() == nullptr) {
return false;
}
::memmove(mapping.GetMutableMapping(), contents.data(), contents.size());
return true;
}
static std::string ReadStringFromFile(const fml::UniqueFD& fd) {
fml::FileMapping mapping(fd);
if (mapping.GetMapping() == nullptr) {
return nullptr;
}
return {reinterpret_cast<const char*>(mapping.GetMapping()),
mapping.GetSize()};
}
TEST(FileTest, CreateTemporaryAndUnlink) {
auto dir_name = fml::CreateTemporaryDirectory();
ASSERT_NE(dir_name, "");
auto dir =
fml::OpenDirectory(dir_name.c_str(), false, fml::FilePermission::kRead);
ASSERT_TRUE(dir.is_valid());
dir.reset();
ASSERT_TRUE(fml::UnlinkDirectory(dir_name.c_str()));
}
TEST(FileTest, ScopedTempDirIsValid) {
fml::ScopedTemporaryDirectory dir;
ASSERT_TRUE(dir.fd().is_valid());
}
TEST(FileTest, CanOpenFileForWriting) {
fml::ScopedTemporaryDirectory dir;
ASSERT_TRUE(dir.fd().is_valid());
auto fd =
fml::OpenFile(dir.fd(), "some.txt", true, fml::FilePermission::kWrite);
ASSERT_TRUE(fd.is_valid());
fd.reset();
ASSERT_TRUE(fml::UnlinkFile(dir.fd(), "some.txt"));
}
TEST(FileTest, CanTruncateAndWrite) {
fml::ScopedTemporaryDirectory dir;
ASSERT_TRUE(dir.fd().is_valid());
std::string contents = "some contents here";
{
auto fd = fml::OpenFile(dir.fd(), "some.txt", true,
fml::FilePermission::kReadWrite);
ASSERT_TRUE(fd.is_valid());
ASSERT_TRUE(fml::TruncateFile(fd, contents.size()));
fml::FileMapping mapping(fd, {fml::FileMapping::Protection::kWrite});
ASSERT_EQ(mapping.GetSize(), contents.size());
ASSERT_NE(mapping.GetMutableMapping(), nullptr);
::memcpy(mapping.GetMutableMapping(), contents.data(), contents.size());
}
{
auto fd =
fml::OpenFile(dir.fd(), "some.txt", false, fml::FilePermission::kRead);
ASSERT_TRUE(fd.is_valid());
fml::FileMapping mapping(fd);
ASSERT_EQ(mapping.GetSize(), contents.size());
ASSERT_EQ(0,
::memcmp(mapping.GetMapping(), contents.data(), contents.size()));
}
fml::UnlinkFile(dir.fd(), "some.txt");
}
TEST(FileTest, CreateDirectoryStructure) {
fml::ScopedTemporaryDirectory dir;
std::string contents = "These are my contents";
{
auto sub = fml::CreateDirectory(dir.fd(), {"a", "b", "c"},
fml::FilePermission::kReadWrite);
ASSERT_TRUE(sub.is_valid());
auto file = fml::OpenFile(sub, "my_contents", true,
fml::FilePermission::kReadWrite);
ASSERT_TRUE(file.is_valid());
ASSERT_TRUE(WriteStringToFile(file, contents));
}
const char* file_path = "a/b/c/my_contents";
{
auto contents_file =
fml::OpenFile(dir.fd(), file_path, false, fml::FilePermission::kRead);
ASSERT_EQ(ReadStringFromFile(contents_file), contents);
}
// Cleanup.
ASSERT_TRUE(fml::UnlinkFile(dir.fd(), file_path));
ASSERT_TRUE(fml::UnlinkDirectory(dir.fd(), "a/b/c"));
ASSERT_TRUE(fml::UnlinkDirectory(dir.fd(), "a/b"));
ASSERT_TRUE(fml::UnlinkDirectory(dir.fd(), "a"));
}
TEST(FileTest, VisitFilesCanBeCalledTwice) {
fml::ScopedTemporaryDirectory dir;
{
auto file = fml::OpenFile(dir.fd(), "my_contents", true,
fml::FilePermission::kReadWrite);
ASSERT_TRUE(file.is_valid());
}
int count;
fml::FileVisitor count_visitor = [&count](const fml::UniqueFD& directory,
const std::string& filename) {
count += 1;
return true;
};
count = 0;
fml::VisitFiles(dir.fd(), count_visitor);
ASSERT_EQ(count, 1);
// Without `rewinddir` in `VisitFiles`, the following check would fail.
count = 0;
fml::VisitFiles(dir.fd(), count_visitor);
ASSERT_EQ(count, 1);
ASSERT_TRUE(fml::UnlinkFile(dir.fd(), "my_contents"));
}
TEST(FileTest, CanListFilesRecursively) {
fml::ScopedTemporaryDirectory dir;
{
auto c = fml::CreateDirectory(dir.fd(), {"a", "b", "c"},
fml::FilePermission::kReadWrite);
ASSERT_TRUE(c.is_valid());
auto file1 =
fml::OpenFile(c, "file1", true, fml::FilePermission::kReadWrite);
auto file2 =
fml::OpenFile(c, "file2", true, fml::FilePermission::kReadWrite);
auto d = fml::CreateDirectory(c, {"d"}, fml::FilePermission::kReadWrite);
ASSERT_TRUE(d.is_valid());
auto file3 =
fml::OpenFile(d, "file3", true, fml::FilePermission::kReadWrite);
ASSERT_TRUE(file1.is_valid());
ASSERT_TRUE(file2.is_valid());
ASSERT_TRUE(file3.is_valid());
}
std::set<std::string> names;
fml::FileVisitor visitor = [&names](const fml::UniqueFD& directory,
const std::string& filename) {
names.insert(filename);
return true;
};
fml::VisitFilesRecursively(dir.fd(), visitor);
ASSERT_EQ(names, std::set<std::string>(
{"a", "b", "c", "d", "file1", "file2", "file3"}));
// Cleanup.
ASSERT_TRUE(fml::UnlinkFile(dir.fd(), "a/b/c/d/file3"));
ASSERT_TRUE(fml::UnlinkFile(dir.fd(), "a/b/c/file1"));
ASSERT_TRUE(fml::UnlinkFile(dir.fd(), "a/b/c/file2"));
ASSERT_TRUE(fml::UnlinkDirectory(dir.fd(), "a/b/c/d"));
ASSERT_TRUE(fml::UnlinkDirectory(dir.fd(), "a/b/c"));
ASSERT_TRUE(fml::UnlinkDirectory(dir.fd(), "a/b"));
ASSERT_TRUE(fml::UnlinkDirectory(dir.fd(), "a"));
}
TEST(FileTest, CanStopVisitEarly) {
fml::ScopedTemporaryDirectory dir;
{
auto d = fml::CreateDirectory(dir.fd(), {"a", "b", "c", "d"},
fml::FilePermission::kReadWrite);
ASSERT_TRUE(d.is_valid());
}
std::set<std::string> names;
fml::FileVisitor visitor = [&names](const fml::UniqueFD& directory,
const std::string& filename) {
names.insert(filename);
return filename == "c" ? false : true; // stop if c is found
};
// Check the d is not visited as we stop at c.
ASSERT_FALSE(fml::VisitFilesRecursively(dir.fd(), visitor));
ASSERT_EQ(names, std::set<std::string>({"a", "b", "c"}));
// Cleanup.
ASSERT_TRUE(fml::UnlinkDirectory(dir.fd(), "a/b/c/d"));
ASSERT_TRUE(fml::UnlinkDirectory(dir.fd(), "a/b/c"));
ASSERT_TRUE(fml::UnlinkDirectory(dir.fd(), "a/b"));
ASSERT_TRUE(fml::UnlinkDirectory(dir.fd(), "a"));
}
#if OS_WIN
#define AtomicWriteTest DISABLED_AtomicWriteTest
#else
#define AtomicWriteTest AtomicWriteTest
#endif
TEST(FileTest, AtomicWriteTest) {
fml::ScopedTemporaryDirectory dir;
const std::string contents = "These are my contents.";
auto data = std::make_unique<fml::DataMapping>(
std::vector<uint8_t>{contents.begin(), contents.end()});
// Write.
ASSERT_TRUE(fml::WriteAtomically(dir.fd(), "precious_data", *data));
// Read and verify.
ASSERT_EQ(contents,
ReadStringFromFile(fml::OpenFile(dir.fd(), "precious_data", false,
fml::FilePermission::kRead)));
// Cleanup.
ASSERT_TRUE(fml::UnlinkFile(dir.fd(), "precious_data"));
}
TEST(FileTest, EmptyMappingTest) {
fml::ScopedTemporaryDirectory dir;
{
auto file = fml::OpenFile(dir.fd(), "my_contents", true,
fml::FilePermission::kReadWrite);
fml::FileMapping mapping(file);
ASSERT_TRUE(mapping.IsValid());
ASSERT_EQ(mapping.GetSize(), 0ul);
ASSERT_EQ(mapping.GetMapping(), nullptr);
}
ASSERT_TRUE(fml::UnlinkFile(dir.fd(), "my_contents"));
}
TEST(FileTest, FileTestsWork) {
fml::ScopedTemporaryDirectory dir;
ASSERT_TRUE(dir.fd().is_valid());
const char* filename = "some.txt";
auto fd =
fml::OpenFile(dir.fd(), filename, true, fml::FilePermission::kWrite);
ASSERT_TRUE(fd.is_valid());
fd.reset();
ASSERT_TRUE(fml::FileExists(dir.fd(), filename));
ASSERT_TRUE(
fml::IsFile(fml::paths::JoinPaths({dir.path(), filename}).c_str()));
ASSERT_TRUE(fml::UnlinkFile(dir.fd(), filename));
}
TEST(FileTest, FileTestsSupportsUnicode) {
fml::ScopedTemporaryDirectory dir;
ASSERT_TRUE(dir.fd().is_valid());
const char* filename = u8"äëïöüテスト☃";
auto fd =
fml::OpenFile(dir.fd(), filename, true, fml::FilePermission::kWrite);
ASSERT_TRUE(fd.is_valid());
fd.reset();
ASSERT_TRUE(fml::FileExists(dir.fd(), filename));
ASSERT_TRUE(
fml::IsFile(fml::paths::JoinPaths({dir.path(), filename}).c_str()));
ASSERT_TRUE(fml::UnlinkFile(dir.fd(), filename));
}