153 lines
4.1 KiB
JavaScript
153 lines
4.1 KiB
JavaScript
/**
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* Tests const keyword
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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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var common = require( './common' ),
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assert = require( 'assert' ),
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// XXX: get rid of this disgusting mess; we're mid-refactor and all these
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// dependencies should not be necessary for testing
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ClassBuilder = common.require( '/ClassBuilder' ),
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MethodWrapperFactory = common.require( '/MethodWrapperFactory' ),
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wrappers = common.require( '/MethodWrappers' ).standard,
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builder = ClassBuilder(
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common.require( '/MemberBuilder' )(
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MethodWrapperFactory( wrappers.wrapNew ),
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MethodWrapperFactory( wrappers.wrapOverride )
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),
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common.require( '/VisibilityObjectFactoryFactory' ).fromEnvironment()
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)
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;
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/**
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* The const keyword should result in a static property. The rationale for this
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* is that, if a value is constant, then instances do not make sense.
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*/
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( function testConstKeywordDeclaresPropertiesAsStatic()
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{
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var val = 'baz',
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Foo = builder.build(
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{
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'const foo': val,
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} )
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;
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assert.equal( val, Foo.$('foo'),
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"Const keyword should declare properties as static"
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);
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} )();
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/**
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* As the name implies, constant properties should not be writable.
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*/
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( function testConstKeywordCreatesImmutableProperty()
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{
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try
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{
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// this should fail (trying to alter const prop foo)
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builder.build( { 'const foo': 'bar' } ).$( 'foo', 'baz' );
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}
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catch ( e )
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{
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assert.ok(
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e.message.search( 'foo' ) !== -1,
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"Const modification error should contain name of property"
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);
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return;
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}
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assert.fail( "Constant properties should not be writable" );
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} )();
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/**
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* Unlike other languages such as PHP, the const keyword can have different
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* levels of visibility.
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*/
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( function testVisibilityModifiersArePermittedWithConstKeyword()
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{
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var protval = 'bar',
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privval = 'baz',
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Foo = builder.build(
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{
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'protected const prot': protval,
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'private const priv': privval,
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'public static getProt': function()
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{
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return this.$('prot');
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},
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'public static getPriv': function()
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{
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return this.$('priv');
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},
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} ),
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// be sure to override each method to ensure we're checking references
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// on the subtype, *not* the parent type
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SubFoo = builder.build( Foo,
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{
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'public static getProt': function()
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{
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return this.$('prot');
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},
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'public static getPriv': function()
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{
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return this.$('priv');
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},
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} )
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;
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assert.equal( Foo.$('prot'), undefined,
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"Protected constants are not available publicly"
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);
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assert.equal( Foo.$('priv'), undefined,
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"Private constants are not available publicly"
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);
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assert.equal( Foo.getProt(), protval,
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"Protected constants are available internally"
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);
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assert.equal( Foo.getPriv(), privval,
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"Private constants are available internally"
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);
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assert.equal( SubFoo.getProt(), protval,
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"Protected constants are available to subtypes internally"
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);
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assert.equal( SubFoo.getPriv(), undefined,
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"Private constants are NOT available to subtypes internally"
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);
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} )();
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