// Taken from parse_config.js, but removed the validation code.
function parseConfig(config) {
    config = Object.extend({}, config, true); // defensive deep copy

    config.startState = config.startState || 'init';
    config.setup = config.setup || Function.prototype;
    config.teardown = config.teardown || Function.prototype;
    config.data = config.data || {};

    return config;
}

// Taken from extend_workload.js, but removed the validation code.
function extendWorkload($config, callback) {
    var parsedSuperConfig = parseConfig($config);
    var childConfig = Object.extend({}, parsedSuperConfig, true);
    return callback(childConfig, parsedSuperConfig);
}

var $config = {}; // Normally would be defined by doing some load() call.

(function() {
    var extend1 = extendWorkload($config, function($config, $super) {
        $config.data.test = 'original';

        $config.setup = function setup(db, collName, cluster) {
            $super.setup.apply(this, arguments);
            print('using $config.data: ' + $config.data.test);

        };

        return $config;
    });

    var extend2 = extendWorkload(extend1, function($config, $super) {
        $config.data.test = 'changed';

        return $config;
    });

    extend2.setup.call(extend2.data); // See setupWorkload() in runner.js
})();

(function() {
    var extend1 = extendWorkload($config, function($config, $super) {
        $config.data.test = 'original';

        $config.setup = function setup(db, collName, cluster) {
            $super.setup.apply(this, arguments);
            print('using this: ' + this.test);

        };

        return $config;
    });

    var extend2 = extendWorkload(extend1, function($config, $super) {
        $config.data.test = 'changed';

        return $config;
    });

    extend2.setup.call(extend2.data); // See setupWorkload() in runner.js
})();