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- /**
- * @license Copyright (c) 2003-2016, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
- */
- 'use strict';
- import History from '/ckeditor5/engine/model/history.js';
- import Delta from '/ckeditor5/engine/model/delta/delta.js';
- import Operation from '/ckeditor5/engine/model/operation/operation.js';
- import CKEditorError from '/ckeditor5/utils/ckeditorerror.js';
- describe( 'History', () => {
- let history;
- beforeEach( () => {
- history = new History();
- } );
- describe( 'constructor', () => {
- it( 'should create an empty History instance', () => {
- expect( Array.from( history.getDeltas() ).length ).to.equal( 0 );
- } );
- } );
- describe( 'addDelta', () => {
- it( 'should save delta in the history', () => {
- let delta = new Delta();
- delta.addOperation( new Operation( 0 ) );
- history.addDelta( delta );
- const deltas = Array.from( history.getDeltas() );
- expect( deltas.length ).to.equal( 1 );
- expect( deltas[ 0 ] ).to.equal( delta );
- } );
- it( 'should save each delta only once', () => {
- let delta = new Delta();
- delta.addOperation( new Operation( 0 ) );
- history.addDelta( delta );
- history.addDelta( delta );
- const deltas = Array.from( history.getDeltas() );
- expect( deltas.length ).to.equal( 1 );
- expect( deltas[ 0 ] ).to.equal( delta );
- } );
- it( 'should save multiple deltas and keep their order', () => {
- let deltas = getDeltaSet();
- for ( let delta of deltas ) {
- history.addDelta( delta );
- }
- const historyDeltas = Array.from( history.getDeltas() );
- expect( historyDeltas ).to.deep.equal( deltas );
- } );
- it( 'should skip deltas that does not have operations', () => {
- let delta = new Delta();
- history.addDelta( delta );
- expect( Array.from( history.getDeltas() ).length ).to.equal( 0 );
- } );
- } );
- describe( 'getDeltas', () => {
- let deltas;
- beforeEach( () => {
- deltas = getDeltaSet();
- for ( let delta of deltas ) {
- history.addDelta( delta );
- }
- } );
- it( 'should return only history deltas from given base version', () => {
- const historyDeltas = Array.from( history.getDeltas( 3 ) );
- expect( historyDeltas ).to.deep.equal( deltas.slice( 1 ) );
- } );
- it( 'should return only history deltas to given base version', () => {
- const historyDeltas = Array.from( history.getDeltas( 3, 6 ) );
- expect( historyDeltas ).to.deep.equal( deltas.slice( 1, 2 ) );
- } );
- it( 'should return empty (finished) iterator if given history point is too high or negative', () => {
- expect( Array.from( history.getDeltas( 20 ) ).length ).to.equal( 0 );
- expect( Array.from( history.getDeltas( -1 ) ).length ).to.equal( 0 );
- } );
- it( 'should throw if given history point is "inside" delta', () => {
- expect( () => {
- Array.from( history.getDeltas( 2 ) );
- } ).to.throw( CKEditorError, /history-wrong-version/ );
- } );
- } );
- describe( 'getDelta', () => {
- beforeEach( () => {
- for ( let delta of getDeltaSet() ) {
- history.addDelta( delta );
- }
- } );
- it( 'should return delta from history that has given base version', () => {
- let delta = history.getDelta( 3 );
- expect( delta.baseVersion ).to.equal( 3 );
- } );
- it( 'should return null if delta has not been found in history', () => {
- expect( history.getDelta( -1 ) ).to.be.null;
- expect( history.getDelta( 2 ) ).to.be.null;
- expect( history.getDelta( 20 ) ).to.be.null;
- } );
- } );
- } );
- function getDeltaSet() {
- const deltas = [];
- deltas.push( getDelta( 0 ) );
- deltas.push( getDelta( 3 ) );
- deltas.push( getDelta( 6 ) );
- return deltas;
- }
- function getDelta( baseVersion ) {
- const delta = new Delta();
- for ( let i = 0; i < 3; i++ ) {
- delta.addOperation( new Operation( i + baseVersion ) );
- }
- return delta;
- }
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