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Filename : array.js
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/* bender-tags: editor */

( function() {
	'use strict';

	bender.test( {
		setUp: function() {
			this.array = CKEDITOR.tools.array;
		},

		'test array.filter': function() {
			var inputArray = [ 2, 1, 2, 2, '2', 3, 4 ],
				// Keep the original array as a copy, we also want to ensure that it does not modify the
				// original array.
				originalInput = inputArray.slice( 0 ),
				expected = [ 1, '2', 3, 4 ],
				ret = this.array.filter( expected, function( elem ) {
					// Leave anything except 2 (strict compare).
					return elem !== 2;
				} );

			assert.isInstanceOf( Array, ret, 'Return type' );
			arrayAssert.itemsAreSame( expected, ret, 'Return value' );
			arrayAssert.itemsAreSame( originalInput, inputArray, 'The original array has not been modified' );
		},

		'test array.filter docs sample': function() {
			var filtered = this.array.filter( [ 0, 1, 2, 3 ], function( value ) {
				// Leave only values equal or greater than 2.
				return value >= 2;
			} );
			arrayAssert.itemsAreSame( [ 2, 3 ], filtered );
		},

		'test array.filter context and arguments': function() {
			var context = {
				foo: 'bar'
			};

			this.array.filter( [ 'a', 'b', 'c' ], function( elem, index ) {
				assert.isString( elem, 'Element type' );
				assert.isNumber( index, 'Index type' );
				assert.areSame( context, this, 'Filter context object' );
				return true;
			}, context );
		},

		'test array.forEach': function() {
			var input = [ 1, 2, 3, 4 ],
				output = [];

			this.array.forEach( input, function( elem, index ) {
				output.push( elem );
				assert.areSame( elem - 1, index, 'Index at iteration ' + index );
			} );

			arrayAssert.itemsAreSame( input, output );
		},

		'test array.forEach context': function() {
			var context = {
				foo: 'bar'
			};

			this.array.forEach( [ 1, 1 ], function() {
				assert.areSame( context, this, 'Context object' );
			}, context );
		},

		'test array.indexOf': function() {
			assert.areSame( 1, this.array.indexOf( [ 1, 2, 3 ], 2 ), 'Case 1' );
			assert.areSame( -1, this.array.indexOf( [ 1, 2, 3 ], 4 ), 'Case 2' );
			assert.areSame( -1, this.array.indexOf( [ 1, 2, 3 ], '2' ), 'Case 3' );
		},

		'test array.isArray': function() {
			var isArray = this.array.isArray;
			assert.isTrue( isArray( [] ), 'Case 1' );
			assert.isFalse( isArray( {} ), 'Case 2' );
			assert.isFalse( isArray( { length: 0 } ), 'Case 3' );
			assert.isFalse( isArray( 'asd' ), 'Case 4' );
			assert.isTrue( isArray( [ 1, 2 ] ), 'Case 5' );
		},

		'test array.map': function() {
			arrayAssert.itemsAreSame( [ 2, 4, 6 ], this.array.map( [ 1, 2, 3 ], function( a ) {
				return a * 2;
			} ) );

			arrayAssert.itemsAreSame( [], this.array.map( [], function( a ) {
				return a * 2;
			} ) );

			arrayAssert.itemsAreSame( [ 12, 10, 6 ], this.array.map( [ 3, 2, 1 ], function( a, i ) {
				return a * this[ i ];
			}, [ 4, 5, 6 ] ) );
		},

		'test array.map does not modify input array': function() {
			var arr = [ 8, 4 ],
				ret = this.array.map( arr, function() {
					return 'a';
				} );

			// Make sure it returned a different array.
			assert.areNotSame( arr, ret, 'Input arr was not modified' );
		},

		'test array.reduce': function() {
			assert.areSame( 6, this.array.reduce( [ 1, 2, 3 ], function( acc, a ) {
				return acc + a;
			}, 0 ) );

			assert.areSame( 9, this.array.reduce( [], function( acc, a ) {
				return acc + a;
			}, 9 ) );

			arrayAssert.itemsAreSame( [ 4, 5 ], this.array.reduce( [ 4, 5, 6, 7 ], function( acc, a, i ) {
				if ( this[ i ] ) {
					acc.push( a );
				}
				return acc;
			}, [], [ true, true, false, false ] ) );

			arrayAssert.itemsAreSame( [ 1, 0, 2, 1, 3, 2 ], this.array.reduce( [ 1, 2, 3, 4, 5 ], function( acc, a ) {
				acc.push( a - acc[ acc.length - 1 ] );

				return acc;
			}, [ 1 ] ) );
		},

		// (#1073)
		'test array.every array': function() {
			var testArray = [ 1234 ],
				testThis = {};

			assert.isTrue( this.array.every( [], function() {} ) );

			assert.isTrue( this.array.every( [ 11, 12, 34, 35, 546546 ], function( item ) {
				return item > 10;
			} ) );
			assert.isFalse( this.array.every( [ 10, 12, 34, 35, 546546 ], function( item ) {
				return item > 10;
			} ) );

			assert.isTrue( this.array.every( [ 'a', 'asdas', 'asdas', 'adsadas' ], function( item ) {
				return item.charAt( 0 ) === 'a';
			} ) );
			assert.isFalse( this.array.every( [ 'a', 'asdas', 'asdas', 'cdsadas' ], function( item ) {
				return item.charAt( 0 ) === 'a';
			} ) );

			this.array.every( testArray, function( item, index, array ) {
				assert.areSame( 1234, item );
				assert.areSame( 0, index );
				assert.areSame( testArray, array );
				assert.areSame( testThis, this );
			}, testThis );
		},

		// (#2700)
		'test array.find no match': function() {
			var arr = [ 'foo', 'bar', 'baz', 1, 2, 3 ],
				results = [],
				ret = this.array.find( arr, function( item, index ) {
					results.push( item );

					arrayAssert.indexOf( item, arr, index, 'Index argument should match item index' );

					return false;
				}, this );

			assert.isUndefined( ret, 'Returned value' );

			arrayAssert.itemsAreSame( arr, results, 'Each array item should be iterated' );
		},

		// (#2700)
		'test array.find match': function() {
			var arr = [ 'foo', 'bar', 'baz', 1, 2, 3 ],
				ret = this.array.find( arr, function( item, index, array ) {
					assert.areSame( arr, array, 'Array argument should match given array' );

					assert.areSame( window, this, 'thisArg should match given object' );

					return item === 'baz';
				}, window );

			assert.areSame( 'baz', ret );
		},

		// (3154)
		'test array.some method': function() {
			var testArray = [ 1234 ],
				testThis = {};

			assert.isFalse( this.array.some( [], function() {} ) );

			assert.isTrue( this.array.some( [ 11, 12, 34, 35, 546546 ], function( item ) {
				return item > 10;
			} ) );

			assert.isTrue( this.array.some( [ 10, 12, 1, 4, 8 ], function( item ) {
				return item > 10;
			} ) );

			assert.isFalse( this.array.some( [ 1, 4, 5, 6, 10 ], function( item ) {
				return item > 10;
			} ) );

			this.array.some( testArray, function( item, index, array ) {
				assert.areSame( 1234, item );
				assert.areSame( 0, index );
				assert.areSame( testArray, array );
				assert.areSame( testThis, this );
			}, testThis );
		},

		'test array.zip method': function() {
			var array1 = [ 'foo', 'bar', 'baz' ],
				array2 = [ 1, 2, 3 ],
				expected = [ [ 'foo', 1 ], [ 'bar', 2 ], [ 'baz', 3 ] ];

			arrayAssert.itemsAreEquivalent( expected, this.array.zip( array1, array2 ), function( arr1, arr2 ) {
				return arr1[ 0 ] === arr2[ 0 ] && arr1[ 1 ]  === arr2[ 1 ];
			} );
		},

		// (#1134)
		'test array.unique method': function() {
			var obj1 = {},
				obj2 = {},
				testArray = [];

			arrayAssert.itemsAreSame( [ 1, 2, 3, 4 ], this.array.unique( [ 1, 2, 3, 4 ] ),
				'array of primitives without duplicates' );
			arrayAssert.itemsAreSame( [ 1, 2, 3, 4 ], this.array.unique( [ 1, 2, 3, 4, 4, 3 ] ),
				'array of primitives with duplicates' );
			arrayAssert.itemsAreSame( [ obj1, obj2 ], this.array.unique( [ obj1, obj2 ] ),
				'array of objects without duplicates' );
			arrayAssert.itemsAreSame( [ obj1, obj2 ], this.array.unique( [ obj1, obj2, obj2, obj1 ] ),
				'array of objects without duplicates' );

			assert.areNotSame( testArray, this.array.unique( testArray ), 'output' );
		}
	} );

} )();