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easejs/test/Interface/GeneralTest.js

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JavaScript

/**
* Tests interfaces
*
* 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
*/
require( 'common' ).testCase(
{
setUp: function()
{
this.FooType = this.require( 'interface' ).extend();
},
/**
* Interface.extend(), like Class.extend(), should result in a new
* interface.
*/
'Interface extend method creates a new interface object': function()
{
this.assertOk(
( typeof this.FooType === 'function' ),
"Interface extend method creates a new interface object"
);
},
/**
* Interfaces describe an API; they do not have any actual implementation.
* It does not make sense to instantiate them.
*/
'Interfaces cannot be instantiated': function()
{
this.assertThrows( function()
{
new this.FooType();
}, Error, "Should not be able to instantiate interfaces" );
},
/**
* To prevent altering the interface after it is defined, the resulting
* object should be frozen, if supported by the environment.
*/
'Generated interface should be frozen': function()
{
// only perform the assertion if supported by our environment
if ( Object.isFrozen )
{
this.assertEqual(
Object.isFrozen( this.FooType ),
true,
"Generated interface object should be frozen"
);
}
},
} );