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easejs/test/test-class.js

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/**
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* Tests class module object creation
*
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* Copyright (C) 2010,2011 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 <http://www.gnu.org/licenses/>.
*
* @author Mike Gerwitz
*/
var common = require( './common' ),
assert = require( 'assert' ),
Class = common.require( 'class' );
assert.ok(
( Class.extend instanceof Function ),
"Class module should provide an 'extend' method"
);
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var Foo = Class.extend(
{
value: 'foo',
});
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assert.ok(
( Foo instanceof Object ),
"Extend method creates a new object"
);
assert.ok(
( Class.isClass( Class.extend() ) ),
"Classes are considered by the system to be classes"
);
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var inst = new Foo();
//
// isClass
assert.ok(
( !( Class.isClass( {} ) ) ),
"Only actual classes are considered to be classes"
);
assert.ok(
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!( Class.isClass( inst ) ),
"Class instances are not considered to be classes (they are objects)"
);
//
// isClassInstance
assert.ok(
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( Class.isClassInstance( inst ) ),
"Class instances are considered to be classes instances"
);
assert.ok(
( !( Class.isClassInstance( Foo ) ) ),
"Classes are not considered to be class instances"
);
assert.ok(
( !( Class.isClassInstance( {} ) ) ),
"Other objects are not considered to be class instances"
);
// only perform check if supported by the engine
if ( Object.isFrozen )
{
assert.equal(
Object.isFrozen( Foo ),
true,
"Generated class should be frozen"
);
}
//
// isInstanceOf
assert.ok(
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Class.isInstanceOf( Foo, inst ),
"Class instance is recognized by Class.isInstanceOf()"
);
assert.ok(
Class.isInstanceOf( Foo, undefined ) === false,
"Checking instance of undefined will not throw an error"
);
assert.ok(
Class.isInstanceOf( undefined, {} ) === false,
"Checking for instance of undefined will not throw an error"
);
assert.ok(
!( Class.isInstanceOf( Foo, Foo ) ),
"Class is not an instance of itself when uninstantiated"
);
assert.ok(
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!( Class.isInstanceOf( inst, Foo ) ),
"Class is not an instance of its instance"
);
assert.equal(
Class.isInstanceOf,
Class.isA,
"isA() is an alias for isInstanceOf()"
);
assert.ok(
( ( inst.isInstanceOf instanceof Function )
&& ( inst.isInstanceOf( Foo ) === true )
&& ( inst.isInstanceOf( inst ) === false )
),
"Class instance contains partially applied isInstanceOf method"
);
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assert.equal(
inst.isInstanceOf,
inst.isA,
"Class instance contains isA() alias for isInstanceOf() partially applied function"
);
assert.ok(
( Foo.__cid !== undefined ),
"Class id available via class"
);
assert.ok(
( Foo.prototype.__cid !== undefined ),
"Class id available via class prototype"
);