wishthis/node_modules/less/test/plugins/filemanager/index.js

(function(exports) {
    var plugin = function(less) {
        var FileManager = less.FileManager, TestFileManager = new FileManager();
        function TestFileManager() { }
        TestFileManager.loadFile = function (filename, currentDirectory, options, environment, callback) {
            if (filename.match(/.*\.test$/)) {
                return less.environment.fileManagers[0].loadFile('colors.test', currentDirectory, options, environment, callback);
            }
            return less.environment.fileManagers[0].loadFile(filename, currentDirectory, options, environment, callback);
        };

        return TestFileManager;
    };

    exports.install = function(less, pluginManager) {
        less.environment.addFileManager(new plugin(less));
    };

})(typeof exports === 'undefined' ? this['AddFilePlugin'] = {} : exports);