/** * @license Copyright (c) 2003-2016, CKSource - Frederico Knabben. All rights reserved. * For licensing, see LICENSE.md. */ import diff from 'ckeditor5/utils/diff.js'; describe( 'diff', () => { it( 'should diff strings', () => { expect( diff( 'aba', 'acca' ) ).to.deep.equals( [ 'equal', 'insert', 'insert', 'delete', 'equal' ] ); } ); it( 'should diff arrays', () => { expect( diff( Array.from( 'aba' ), Array.from( 'acca' ) ) ).to.deep.equals( [ 'equal', 'insert', 'insert', 'delete', 'equal' ] ); } ); it( 'should reverse result if the second string is shorter', () => { expect( diff( 'acca', 'aba' ) ).to.deep.equals( [ 'equal', 'delete', 'delete', 'insert', 'equal' ] ); } ); it( 'should diff if strings are same', () => { expect( diff( 'abc', 'abc' ) ).to.deep.equals( [ 'equal', 'equal', 'equal' ] ); } ); it( 'should diff if one string is empty', () => { expect( diff( '', 'abc' ) ).to.deep.equals( [ 'insert', 'insert', 'insert' ] ); } ); it( 'should use custom comparator', () => { expect( diff( 'aBc', 'abc' ) ).to.deep.equals( [ 'equal', 'insert', 'delete', 'equal' ] ); expect( diff( 'aBc', 'abc', ( a, b ) => a.toLowerCase() == b.toLowerCase() ) ).to.deep.equals( [ 'equal', 'equal', 'equal' ] ); } ); } );