/**
 * Copyright (C) 2014 MongoDB Inc.
 *
 * This program is free software: you can redistribute it and/or  modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * As a special exception, the copyright holders give permission to link the
 * code of portions of this program with the OpenSSL library under certain
 * conditions as described in each individual source file and distribute
 * linked combinations including the program with the OpenSSL library. You
 * must comply with the GNU Affero General Public License in all respects
 * for all of the code used other than as permitted herein. If you modify
 * file(s) with this exception, you may extend this exception to your
 * version of the file(s), but you are not obligated to do so. If you do not
 * wish to do so, delete this exception statement from your version. If you
 * delete this exception statement from all source files in the program,
 * then also delete it in the license file.
 */

#include <string>

#include "mongo/bson/util/builder.h"
#include "mongo/db/dbmessage.h"
#include "mongo/unittest/unittest.h"

namespace mongo {
    using std::string;

    // Test if the reserved field is short of 4 bytes
    TEST(DBMessage1, ShortFlags) {
        BufBuilder b;
        string ns("test");

        b.appendChar( 1 );

        Message toSend;
        toSend.setData( dbDelete , b.buf() , b.len() );

        ASSERT_THROWS(DbMessage d1(toSend), UserException);
    }

    // Test a short NS missing a trailing null
    TEST(DBMessage1, BadNS) {
        BufBuilder b;

        b.appendNum( static_cast<int>(1) );
        b.appendChar( 'b' );
        b.appendChar( 'a' );
        b.appendChar( 'd' );
        // Forget to append \0

        Message toSend;
        toSend.setData( dbDelete , b.buf() , b.len() );

        ASSERT_THROWS(DbMessage d1(toSend), UserException);
    }

    // Test a valid kill message and try an extra pull
    TEST(DBMessage1, GoodKill) {
        BufBuilder b;

        b.appendNum( static_cast<int>(1) );
        b.appendNum( static_cast<int>(3) );

        Message toSend;
        toSend.setData( dbKillCursors , b.buf() , b.len() );

        DbMessage d1(toSend);
        ASSERT_EQUALS(3, d1.pullInt());

        ASSERT_THROWS(d1.pullInt(), UserException);
    }

    // Try a bad read of a type too large
    TEST(DBMessage1, GoodKill2) {
        BufBuilder b;

        b.appendNum( static_cast<int>(1) );
        b.appendNum( static_cast<int>(3) );

        Message toSend;
        toSend.setData( dbKillCursors , b.buf() , b.len() );

        DbMessage d1(toSend);
        ASSERT_THROWS(d1.pullInt64(), UserException);
    }

    // Test a basic good insert, and an extra read
    TEST(DBMessage1, GoodInsert) {
        BufBuilder b;
        string ns("test");

        b.appendNum( static_cast<int>(1) );
        b.appendStr(ns);
        b.appendNum( static_cast<int>(3) );
        b.appendNum( static_cast<int>(39) );

        Message toSend;
        toSend.setData( dbInsert , b.buf() , b.len() );

        DbMessage d1(toSend);
        ASSERT_EQUALS(3, d1.pullInt());
        ASSERT_EQUALS(39, d1.pullInt());
        ASSERT_THROWS(d1.pullInt(), UserException);
    }

    // Test a basic good insert, and an extra read
    TEST(DBMessage1, GoodInsert2) {
        BufBuilder b;
        string ns("test");

        b.appendNum( static_cast<int>(1) );
        b.appendStr(ns);
        b.appendNum( static_cast<int>(3) );
        b.appendNum( static_cast<int>(39) );

        BSONObj bo = BSON( "ts" << 0 );
        bo.appendSelfToBufBuilder( b );

        Message toSend;
        toSend.setData( dbInsert , b.buf() , b.len() );

        DbMessage d1(toSend);
        ASSERT_EQUALS(3, d1.pullInt());


        ASSERT_EQUALS(39, d1.pullInt());
        BSONObj bo2 = d1.nextJsObj();
        ASSERT_THROWS(d1.nextJsObj(), MsgAssertionException);
    }



} // mongo namespace
