144 lines
3.4 KiB
JavaScript
144 lines
3.4 KiB
JavaScript
/**
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* Tests util.clone
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*
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* Copyright (C) 2010, 2011, 2013 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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var common = require( './common' ),
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assert = require( 'assert' ),
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util = common.require( 'util' );
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var arr = [ 1, 2, 3 ],
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obj = { a: 1, b: 2 };
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var arr2 = util.clone( arr ),
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obj2 = util.clone( obj );
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assert.ok(
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( arr !== arr2 ),
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"Cloned array is not the same object as the original"
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);
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assert.ok(
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( obj !== obj2 ),
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"Cloned object is not the same object as the original"
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);
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// ensure array was properly cloned
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for ( var i = 0, len = arr.length; i < len; i++ )
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{
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assert.equal(
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arr2[ i ],
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arr[ i ],
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"Array data is properly cloned"
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);
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}
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// ensure object was properly cloned
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for ( var prop in obj )
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{
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assert.equal(
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obj2[ prop ],
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obj[ prop ],
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"Object data is properly cloned"
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);
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}
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//
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// deep clone
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var deep_arr = [ [ 1, 2 ], [ 3, 4 ], [ 5, [ 6, 7 ] ], { a: 1 } ],
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deep_obj = { a: [ 1 ], b: [ 2 ], c: { d: 3 } },
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deep_arr2 = util.clone( deep_arr, true ),
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deep_obj2 = util.clone( deep_obj, true ),
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deep_i = 0;
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// ensure that the cloned values still match
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assert.deepEqual(
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deep_arr2,
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deep_arr,
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"Deep cloned values are equal"
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);
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assert.deepEqual(
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deep_obj2,
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deep_obj,
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"Deep cloned values are equal"
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);
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deep_i = deep_arr.length;
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while ( deep_i-- )
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{
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assert.ok(
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( deep_arr2[ i ] !== deep_arr[ i ] ),
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"Deep cloned array's values are cloned"
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);
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}
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for ( var prop in deep_obj )
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{
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assert.ok(
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( deep_obj2[ prop ] !== deep_obj[ prop ] ),
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"Deep cloned object's values are cloned (" + prop + ")"
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);
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}
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/**
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* "Cloning" functions doesn't necessarily make sense. It can, depending on how
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* you think about it. We can do a toSource() in many circumstances and create a
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* new function from that. But what's the point? It still does the same thing.
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* As such, functions will not be cloned. They'll be returned by reference.
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*/
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( function testCloneDoesNothingWithFunctions()
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{
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var func = function() {},
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obj = { foo: func };
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assert.ok( func === util.clone( obj, true ).foo,
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"Functions should not be cloned"
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);
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} )();
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/**
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* Primitives cannot be cloned, so we should expect that they are simply
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* returned
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*/
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( function testPrimitivesAreProperlyReturnedByClone()
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{
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// we don't try NaN because NaN != NaN; we'll try it separately
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var prim = [ null, 1, true, false, undefined ],
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i = prim.length;
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while ( i-- )
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{
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var val = prim[ i ];
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assert.equal( val, util.clone( val ),
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'Failed to clone primitive value: ' + val
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);
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}
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// test NaN separately
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assert.ok( isNaN( util.clone( NaN ) ) );
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} )();
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