// unittest.h

/**
*    Copyright (C) 2008 10gen 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/>.
*/

#pragma once

namespace mongo {

    /* The idea here is to let all initialization of global variables (classes inheriting from UnitTest)
       complete before we run the tests -- otherwise order of initilization being arbitrary may mess
       us up.  The app's main() function should call runTests().

       To define a unit test, inherit from this and implement run. instantiate one object for the new class
       as a global.
    */
    struct UnitTest {
        UnitTest() {
            registerTest(this);
        }
        virtual ~UnitTest() {}

        // assert if fails
        virtual void run() = 0;

        static bool testsInProgress() { return running; }
    private:
        static vector<UnitTest*> *tests;
        static bool running;
    public:
        static void registerTest(UnitTest *t) {
            if ( tests == 0 )
                tests = new vector<UnitTest*>();
            tests->push_back(t);
        }

        static void runTests() {
            running = true;
            for ( vector<UnitTest*>::iterator i = tests->begin(); i != tests->end(); i++ ) {
                (*i)->run();
            }
            running = false;
        }
    };


} // namespace mongo