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// 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/test/test_proto_loader.h"
#include "base/check.h"
#include "base/files/file_util.h"
#include "base/memory/ptr_util.h"
#include "base/memory/raw_ptr.h"
#include "base/path_service.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "third_party/protobuf/src/google/protobuf/descriptor.h"
#include "third_party/protobuf/src/google/protobuf/descriptor.pb.h"
#include "third_party/protobuf/src/google/protobuf/descriptor_database.h"
#include "third_party/protobuf/src/google/protobuf/dynamic_message.h"
#include "third_party/protobuf/src/google/protobuf/message.h"
#include "third_party/protobuf/src/google/protobuf/text_format.h"
namespace base {
class TestProtoSetLoader::State {
public:
explicit State(std::string_view descriptor_binary_proto) {
CHECK(descriptor_set_.ParseFromArray(descriptor_binary_proto.data(),
descriptor_binary_proto.size()))
<< "Couldn't parse descriptor";
for (auto& file : descriptor_set_.file()) {
descriptor_database_.Add(file);
}
descriptor_pool_ = std::make_unique<google::protobuf::DescriptorPool>(
&descriptor_database_);
}
std::unique_ptr<google::protobuf::Message> NewMessage(
std::string_view full_type_name) {
const google::protobuf::Descriptor* message_type =
descriptor_pool_->FindMessageTypeByName(std::string(full_type_name));
CHECK(message_type) << "Couldn't find proto message type "
<< full_type_name;
return base::WrapUnique(
dynamic_message_factory_.GetPrototype(message_type)->New());
}
private:
google::protobuf::FileDescriptorSet descriptor_set_;
google::protobuf::SimpleDescriptorDatabase descriptor_database_;
std::unique_ptr<google::protobuf::DescriptorPool> descriptor_pool_;
google::protobuf::DynamicMessageFactory dynamic_message_factory_;
};
TestProtoSetLoader::TestProtoSetLoader(std::string_view descriptor_binary_proto)
: state_(std::make_unique<State>(descriptor_binary_proto)) {}
TestProtoSetLoader::TestProtoSetLoader(const base::FilePath& descriptor_path) {
std::string file_contents;
CHECK(base::ReadFileToString(descriptor_path, &file_contents))
<< "Couldn't load contents of " << descriptor_path;
state_ = std::make_unique<State>(file_contents);
}
TestProtoSetLoader::~TestProtoSetLoader() = default;
std::string TestProtoSetLoader::ParseFromText(
std::string_view type_name,
const std::string& proto_text) const {
// Create a message of the given type, parse, and return.
std::unique_ptr<google::protobuf::Message> message =
state_->NewMessage(type_name);
CHECK(
google::protobuf::TextFormat::ParseFromString(proto_text, message.get()));
return message->SerializeAsString();
}
std::string TestProtoSetLoader::PrintToText(
std::string_view type_name,
const std::string& serialized_message) const {
// Create a message of the given type, read the serialized message, and
// print to text format.
std::unique_ptr<google::protobuf::Message> message =
state_->NewMessage(type_name);
CHECK(message->ParseFromString(serialized_message));
std::string proto_text;
CHECK(google::protobuf::TextFormat::PrintToString(*message, &proto_text));
return proto_text;
}
TestProtoLoader::TestProtoLoader(std::string_view descriptor_binary_proto,
std::string_view type_name)
: set_loader_(descriptor_binary_proto), type_name_(type_name) {}
TestProtoLoader::TestProtoLoader(const base::FilePath& descriptor_path,
std::string_view type_name)
: set_loader_(descriptor_path), type_name_(type_name) {}
TestProtoLoader::~TestProtoLoader() = default;
void TestProtoLoader::ParseFromText(const std::string& proto_text,
std::string& serialized_message) const {
serialized_message = set_loader_.ParseFromText(type_name_, proto_text);
}
void TestProtoLoader::PrintToText(const std::string& serialized_message,
std::string& proto_text) const {
proto_text = set_loader_.PrintToText(type_name_, serialized_message);
}
} // namespace base
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