101 lines
2.7 KiB
JavaScript
101 lines
2.7 KiB
JavaScript
/**
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* Tests virtual trait methods
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*
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* Copyright (C) 2014 Mike Gerwitz
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*
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* This file is part of GNU ease.js.
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*
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* ease.js is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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require( 'common' ).testCase(
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{
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caseSetUp: function()
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{
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this.Sut = this.require( 'Trait' );
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this.Class = this.require( 'class' );
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},
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/**
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* If a trait specifies a virtual method, then the class should expose
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* the method as virtual.
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*/
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'Class inherits virtual trait method': function()
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{
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var expected = 'foobar';
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var T = this.Sut(
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{
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'virtual foo': function()
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{
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return expected;
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}
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} );
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var C = this.Class.use( T ).extend( {} );
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// ensure that we are actually using the method
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this.assertEqual( C().foo(), expected );
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// if virtual, we should be able to override it
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var expected2 = 'foobaz',
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C2;
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this.assertDoesNotThrow( function()
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{
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C2 = C.extend(
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{
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'override foo': function()
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{
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return expected2;
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}
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} );
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} );
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this.assertEqual( C2().foo(), expected2 );
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},
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/**
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* Virtual trait methods should be treated in a manner similar to
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* abstract trait methods---a class should be able to provide its own
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* concrete implementation. Note that this differs from the above test
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* because we are overriding the method internally at definition time,
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* not subclassing.
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*/
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'Class can override virtual trait method': function()
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{
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var _self = this;
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var T = this.Sut(
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{
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'virtual foo': function()
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{
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// we should never execute this (unless we're broken)
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_self.fail( true, false,
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"Method was not overridden."
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);
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}
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} );
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var expected = 'foobar';
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var C = this.Class.use( T ).extend(
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{
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'override foo': function() { return expected; }
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} );
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this.assertEqual( C().foo(), expected );
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},
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} );
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