/** * Tests method builder * * Copyright (C) 2010 Mike Gerwitz * * This file is part of ease.js. * * ease.js is free software: you can redistribute it and/or modify it under the * terms of the GNU Lesser General Public License as published by the Free * Software Foundation, either version 3 of the License, or (at your option) * any later version. * * 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 Lesser General Public License * for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see . * * @author Mike Gerwitz * @package test */ var common = require( './common' ), assert = require( 'assert' ), mb_common = require( './inc-member_builder-common' ) ; mb_common.value = function() {}; mb_common.buildMember = common.require( 'member_builder' ).buildMethod; // do assertions common to all member builders mb_common.assertCommon(); /** * One may question the purpose of this assertion. Why should we not permit * overriding properties with methods? It's useful to be able to store callbacks * and such within properties. * * Yes, it is. However, that would be misinterpreting the purpose of the method * builder. Here, we are working with prototypes, not class instances. If the * user wishes to assign a function to the property (so long as it's permitted * by the type definition) after the class is instantiated, he/she may go right * ahead. However, if we modify the prototype to use a function, then the * prototype will interpret the function as a method. As such, the method cannot * be overridden with a property in the future. To avoid this confusing * scenario, we'll prevent it from occurring entirely. */ ( function testCannotOverridePropertyWithMethod() { mb_common.value = 'moofoo'; mb_common.buildMemberQuick(); assert.throws( function() { // attempt to override with function mb_common.value = function() {}; mb_common.buildMemberQuick( {}, true ); }, TypeError, "Cannot override property with method" ); } )();