// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

// Date: 2015/03/31 14:50:20


#include <gtest/gtest.h>
#include <memory>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/descriptor.pb.h>
#include <google/protobuf/dynamic_message.h>
#include "brpc/policy/baidu_rpc_meta.pb.h"
#include "echo.pb.h"

namespace {
using namespace google::protobuf;
using namespace brpc;

void BuildDependency(const FileDescriptor *file_desc, DescriptorPool *pool) {
    for (int i = 0; i < file_desc->dependency_count(); ++i) {
        const FileDescriptor *fd = file_desc->dependency(i);
        BuildDependency(fd, pool);
        FileDescriptorProto proto;
        fd->CopyTo(&proto);
        ASSERT_TRUE(pool->BuildFile(proto) != NULL);
    }
    FileDescriptorProto proto;
    file_desc->CopyTo(&proto);
    ASSERT_TRUE(pool->BuildFile(proto) != NULL);
}

TEST(ProtoTest, proto) {
    policy::RpcMeta meta;
    const Descriptor *desc = meta.GetDescriptor();
    const FileDescriptor *file_desc = desc->file();
    DescriptorPool pool;
    DynamicMessageFactory factory(&pool);
    BuildDependency(file_desc, &pool);
    FileDescriptorProto file_desc_proto;
    file_desc->CopyTo(&file_desc_proto);
    const FileDescriptor *new_file_desc = pool.BuildFile(file_desc_proto);
    ASSERT_TRUE(new_file_desc != NULL);
    const Descriptor *new_desc = new_file_desc->FindMessageTypeByName(desc->name());
    ASSERT_TRUE(new_desc != NULL);
    meta.set_correlation_id(123);
    std::string data;
    ASSERT_TRUE(meta.SerializeToString(&data));
    std::unique_ptr<Message> msg(factory.GetPrototype(new_desc)->New());
    ASSERT_TRUE(msg != NULL);
    ASSERT_TRUE(msg->ParseFromString(data));
    ASSERT_TRUE(msg->SerializeToString(&data));
    policy::RpcMeta new_meta;
    ASSERT_TRUE(new_meta.ParseFromString(data));
    ASSERT_EQ(123, new_meta.correlation_id());
}

TEST(ProtoTest, required_enum) {
    test::Message1 msg1;
    msg1.set_stat(test::STATE0_NUM_1);
    std::string buf;
    ASSERT_TRUE(msg1.SerializeToString(&buf));
    test::Message2 msg2;
    ASSERT_TRUE(msg2.ParseFromString(buf));
    ASSERT_EQ((int)msg1.stat(), (int)msg2.stat());
    msg1.set_stat(test::STATE0_NUM_2);
    ASSERT_TRUE(msg1.SerializeToString(&buf));
    ASSERT_FALSE(msg2.ParseFromString(buf));
}
} //namespace