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easejs/test/test-class-parent.js

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/**
* Tests class parent invocation
*
* 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 <http://www.gnu.org/licenses/>.
*
* @author Mike Gerwitz
* @package test
*/
var common = require( './common' ),
assert = require( 'assert' ),
Class = common.require( 'class' );
// we store these outside of the class to ensure that visibility bugs do not
// get in the way of our assertions
hitMethod = false,
hitMethod2 = false,
method2Arg = null,
Foo = Class.extend(
{
'virtual myMethod': function()
{
hitMethod = true;
return this;
},
'virtual myMethod2': function( arg )
{
hitMethod2 = true;
method2Arg = arg;
return this;
},
}),
SubFoo = Foo.extend(
{
myMethod: function()
{
return this;
},
myMethod2: function( arg )
{
return this.__super( arg );
},
}),
foo = new Foo(),
sub_foo = new SubFoo()
;
// make sure we're working properly before we run the important assertions
foo.myMethod().myMethod2();
assert.equal(
hitMethod,
true,
"Sanity check"
);
assert.equal(
hitMethod2,
true,
"Sanity check"
);
hitMethod = hitMethod2 = false;
var arg = 'foobar';
sub_foo.myMethod().myMethod2( arg );
// myMethod overrides without calling parent
assert.equal(
hitMethod,
false,
"Subtype should be able to override parent properties"
);
// myMethod2 overrides parent then calls super method
assert.equal(
hitMethod2,
true,
"Subtype should be able to call parent method"
);
assert.equal(
method2Arg,
arg,
"Arguments should be passed to super method via _super argument list"
);
assert.throws( function()
{
Foo.extend(
{
// overriding method with scalar; shouldn't be allowed
myMethod: 'scalar',
});
}, TypeError, "Methods must be overridden with a Function" );