102 lines
2.4 KiB
JavaScript
102 lines
2.4 KiB
JavaScript
/**
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* Tests class module extend() method
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*
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* Copyright (C) 2010 Mike Gerwitz
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*
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* This file is part of ease.js.
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*
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* ease.js is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser 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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* @author Mike Gerwitz
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* @package test
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*/
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require( './common' );
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var assert = require( 'assert' ),
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Class = require( 'class' );
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var foo_props = {
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one: 1,
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two: 2,
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},
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Foo = Class.extend( foo_props );
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assert.ok(
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( Foo.extend instanceof Function ),
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"Created class contains extend method"
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);
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var sub_props = {
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three: 3,
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four: 4,
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},
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SubFoo = Foo.extend( sub_props );
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assert.ok(
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( SubFoo instanceof Object ),
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"Subtype is returned as an object"
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);
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// ensure properties were inherited from supertype
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for ( var prop in foo_props )
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{
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assert.equal(
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foo_props[ prop ],
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SubFoo.prototype[ prop ],
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"Subtype inherits parent properties: " + prop
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);
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}
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// and ensure that the subtype's properties were included
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for ( var prop in sub_props )
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{
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assert.equal(
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sub_props[ prop ],
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SubFoo.prototype[ prop ],
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"Subtype contains its own properties: " + prop
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);
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}
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assert.ok(
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( new SubFoo() instanceof Foo ),
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"Subtypes must be considered to be instances of their supertypes"
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);
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// Foo
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// |
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// SubFoo
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// / \
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// SubSubFoo SubSubFoo2
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//
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var SubSubFoo = SubFoo.extend(),
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SubSubFoo2 = SubFoo.extend();
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assert.ok(
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( new SubSubFoo() instanceof Foo ),
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"Sub-subtypes should be instances of their super-supertype"
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);
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assert.ok(
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!( new SubFoo() instanceof SubSubFoo ),
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"Supertypes should not be considered instances of their subtypes"
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);
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assert.ok(
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!( new SubSubFoo2() instanceof SubSubFoo ),
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"Subtypes should not be considered instances of their siblings"
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);
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