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@@ -0,0 +1,37 @@
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+/**
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+ * @license Copyright (c) 2003-2016, CKSource - Frederico Knabben. All rights reserved.
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+ * For licensing, see LICENSE.md.
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+ */
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+
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+'use strict';
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+
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+const modules = bender.amd.require( 'core/utils-diff' );
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+
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+describe( 'diff', () => {
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+ let diff;
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+
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+ before( () => {
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+ diff = modules[ 'core/utils-diff' ];
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+ } );
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+
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+ it( 'should diff arrays', () => {
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+ expect( diff( 'aba', 'acca' ) ).to.deep.equals( [ 0, 1, 1, -1, 0 ] );
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+ } );
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+
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+ it( 'should reverse result if the second array is shorter', () => {
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+ expect( diff( 'acca', 'aba' ) ).to.deep.equals( [ 0, -1, -1, 1, 0 ] );
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+ } );
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+
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+ it( 'should diff if arrays are same', () => {
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+ expect( diff( 'abc', 'abc' ) ).to.deep.equals( [ 0, 0, 0 ] );
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+ } );
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+
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+ it( 'should diff if one array is empty', () => {
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+ expect( diff( '', 'abc' ) ).to.deep.equals( [ 1, 1, 1 ] );
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+ } );
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+
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+ it( 'should use custom comparator', () => {
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+ expect( diff( 'aBc', 'abc' ) ).to.deep.equals( [ 0, 1, -1, 0 ] );
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+ expect( diff( 'aBc', 'abc', ( a, b ) => a.toLowerCase() == b.toLowerCase() ) ).to.deep.equals( [ 0, 0, 0 ] );
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+ } );
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+} );
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