109 lines
3.1 KiB
JavaScript
109 lines
3.1 KiB
JavaScript
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/**
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* Tests immediate definition/instantiation
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*
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* Copyright (C) 2014 Mike Gerwitz
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*
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* This file is part of GNU ease.js.
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*
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* ease.js is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU 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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require( 'common' ).testCase(
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{
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caseSetUp: function()
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{
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this.Sut = this.require( 'Trait' );
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this.Class = this.require( 'class' );
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},
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/**
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* In our most simple case, mixing a trait into an empty base class and
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* immediately invoking the resulting partial class (without explicitly
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* extending) should have the effect of instantiating a concrete version
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* of the trait (so long as that is permitted). While this test exists
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* to ensure consistency throughout the system, it may be helpful in
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* situations where a trait is useful on its own.
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*/
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'Invoking partial class after mixin instantiates': function()
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{
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var called = false;
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var T = this.Sut(
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{
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'public foo': function()
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{
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called = true;
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},
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} );
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// mixes T into an empty base class and instantiates
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this.Class.use( T )().foo();
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this.assertOk( called );
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},
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/**
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* This is the most useful and conventional form of mixin---runtime,
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* atop of an existing class. In this case, we provide a short-hand form
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* of instantiation to avoid the ugly pattern of `.extend( {} )()'.
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*/
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'Can invoke partial mixin atop of non-empty base': function()
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{
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var called_foo = false,
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called_bar = false;
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var C = this.Class(
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{
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'public foo': function() { called_foo = true; },
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} );
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var T = this.Sut(
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{
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'public bar': function() { called_bar = true; },
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} );
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// we must ensure not only that we have mixed in the trait, but that
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// we have also maintained C's interface
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var inst = C.use( T )();
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inst.foo();
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inst.bar();
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this.assertOk( called_foo );
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this.assertOk( called_bar );
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},
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/**
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* Ensure that the partial invocation shorthand is equivalent to the
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* aforementioned `.extend( {} ).apply( null, arguments )'.
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*/
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'Partial arguments are passed to class constructor': function()
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{
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var given = null,
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expected = { foo: 'bar' };
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var C = this.Class(
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{
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__construct: function() { given = arguments; },
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} );
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var T = this.Sut( {} );
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C.use( T )( expected );
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this.assertStrictEqual( given[ 0 ], expected );
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},
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} );
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