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// Copyright 2014 The Chromium 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 "base/files/file.h"
#include "base/files/file_util.h"
#include "base/files/scoped_temp_dir.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "tools/gn/functions.h"
#include "tools/gn/test_with_scope.h"
namespace {
// Returns true on success, false if write_file signaled an error.
bool CallWriteFile(Scope* scope,
const std::string& filename,
const Value& data) {
Err err;
std::vector<Value> args;
args.push_back(Value(NULL, filename));
args.push_back(data);
FunctionCallNode function_call;
Value result = functions::RunWriteFile(scope, &function_call, args, &err);
EXPECT_EQ(Value::NONE, result.type()); // Should always return none.
return !err.has_error();
}
} // namespace
TEST(WriteFile, WithData) {
TestWithScope setup;
// Make a real directory for writing the files.
base::ScopedTempDir temp_dir;
ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
setup.build_settings()->SetRootPath(temp_dir.path());
setup.build_settings()->SetBuildDir(SourceDir("//out/"));
Value some_string(NULL, "some string contents");
// Should refuse to write files outside of the output dir.
EXPECT_FALSE(CallWriteFile(setup.scope(), "//in_root.txt", some_string));
EXPECT_FALSE(CallWriteFile(setup.scope(), "//other_dir/foo.txt",
some_string));
// Should be able to write to a new dir inside the out dir.
EXPECT_TRUE(CallWriteFile(setup.scope(), "//out/foo.txt", some_string));
base::FilePath foo_name = temp_dir.path().Append(FILE_PATH_LITERAL("out"))
.Append(FILE_PATH_LITERAL("foo.txt"));
std::string result_contents;
EXPECT_TRUE(base::ReadFileToString(foo_name, &result_contents));
EXPECT_EQ(some_string.string_value(), result_contents);
// Update the contents with a list of a string and a number.
Value some_list(NULL, Value::LIST);
some_list.list_value().push_back(Value(NULL, "line 1"));
some_list.list_value().push_back(Value(NULL, static_cast<int64>(2)));
EXPECT_TRUE(CallWriteFile(setup.scope(), "//out/foo.txt", some_list));
EXPECT_TRUE(base::ReadFileToString(foo_name, &result_contents));
EXPECT_EQ("line 1\n2\n", result_contents);
// Test that the file is not rewritten if the contents are not changed.
// Start by setting the modified time to something old to avoid clock
// resolution issues.
base::Time old_time = base::Time::Now() - base::TimeDelta::FromDays(1);
base::File foo_file(foo_name,
base::File::FLAG_OPEN |
base::File::FLAG_READ | base::File::FLAG_WRITE);
ASSERT_TRUE(foo_file.IsValid());
foo_file.SetTimes(old_time, old_time);
// Read the current time to avoid timer resolution issues when comparing
// below.
base::File::Info original_info;
foo_file.GetInfo(&original_info);
EXPECT_TRUE(CallWriteFile(setup.scope(), "//out/foo.txt", some_list));
// Verify that the last modified time is the same as before.
base::File::Info new_info;
foo_file.GetInfo(&new_info);
EXPECT_EQ(original_info.last_modified, new_info.last_modified);
}
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