+ describe('Undo/redo', function() {
+
+ it('smoke tests', function() {
+ var doc = getDocumentFromXML('<div>Alice</div>'),
+ textNode = doc.root.contents()[0];
+
+ expect(doc.undoStack).to.have.length(0);
+
+ textNode.wrapWith({tagName: 'span', start:1, end:2});
+ expect(doc.undoStack).to.have.length(1, '1');
+ expect(doc.toXML()).to.equal('<div>A<span>l</span>ice</div>');
+
+ doc.undo();
+ expect(doc.undoStack).to.have.length(0, '2');
+ expect(doc.toXML()).to.equal('<div>Alice</div>');
+
+ doc.redo();
+ expect(doc.undoStack).to.have.length(1, '3');
+ expect(doc.toXML()).to.equal('<div>A<span>l</span>ice</div>');
+
+ doc.undo();
+ expect(doc.undoStack).to.have.length(0, '4');
+ expect(doc.toXML()).to.equal('<div>Alice</div>');
+
+ doc.undo();
+ expect(doc.undoStack).to.have.length(0, '5');
+ expect(doc.toXML()).to.equal('<div>Alice</div>');
+ });
+
+ it('smoke tests 2', function() {
+ var doc = getDocumentFromXML('<div>Alice</div>'),
+ textNode = doc.root.contents()[0],
+ path = textNode.getPath();
+
+ textNode.setText('Alice ');
+ textNode.setText('Alice h');
+ textNode.setText('Alice ha');
+ textNode.setText('Alice has');
+
+ expect(textNode.getText()).to.equal('Alice has');
+
+ doc.undo();
+ expect(doc.root.contents()[0].getText()).to.equal('Alice ha', '1');
+
+ doc.undo();
+ expect(doc.root.contents()[0].getText()).to.equal('Alice h', '2');
+
+ doc.redo();
+ expect(doc.root.contents()[0].getText()).to.equal('Alice ha', '3');
+
+ doc.redo();
+ expect(doc.root.contents()[0].getText()).to.equal('Alice has', '4');
+
+ doc.undo();
+ doc.undo();
+ textNode = doc.getNodeByPath(path);
+ textNode.setText('Cat');
+ doc.undo();
+ textNode = doc.getNodeByPath(path);
+ expect(textNode.getText()).to.equal('Alice h');
+ });
+
+
+ var sampleMethod = function(val) {
+ this._$.attr('x', val);
+ this.triggerChangeEvent();
+ };
+
+ var transformations = {
+ 'unaware': sampleMethod,
+ 'returning change root': {
+ impl: sampleMethod,
+ getChangeRoot: function() {
+ return this.context;
+ }
+ },
+ 'implementing undo operation': {
+ impl: function(t, val) {
+ t.oldVal = this.getAttr('x');
+ sampleMethod.call(this, val);
+ },
+ undo: function(t) {
+ this.setAttr('x', t.oldVal);
+ }
+ }
+ };
+
+ _.pairs(transformations).forEach(function(pair) {
+ var name = pair[0],
+ transformaton = pair[1];
+
+ describe(name + ' transformation: ', function() {
+ var doc, node, nodePath;
+
+ beforeEach(function() {
+ doc = getDocumentFromXML('<div><test x="old"></test></div>');
+
+ doc.registerExtension({elementNode: {transformations: {
+ test: transformaton
+ }}});
+
+ node = doc.root.contents()[0];
+ nodePath = node.getPath();
+ });
+
+ it('transforms as expected', function() {
+ node.test('new');
+ expect(node.getAttr('x')).to.equal('new');
+ });
+
+ it('can be undone', function() {
+ node.test('new');
+ doc.undo();
+ node = doc.getNodeByPath(nodePath);
+ expect(node.getAttr('x')).to.equal('old');
+ });
+
+ it('can be undone and then redone', function() {
+ node.test('new');
+ doc.undo();
+ doc.redo();
+ node = doc.getNodeByPath(nodePath);
+ expect(node.getAttr('x')).to.equal('new');
+ });
+
+ it('handles a sample scenario', function() {
+ doc.root.contents()[0].test('1');
+ doc.root.contents()[0].test('2');
+ doc.root.contents()[0].test('3');
+ doc.root.contents()[0].test('4');
+ doc.root.contents()[0].test('5');
+
+ expect(doc.root.contents()[0].getAttr('x')).to.equal('5', 'after initial transformations');
+ doc.undo();
+ expect(doc.root.contents()[0].getAttr('x')).to.equal('4', 'undo 1.1');
+ doc.undo();
+ expect(doc.root.contents()[0].getAttr('x')).to.equal('3', 'undo 1.2');
+ doc.redo();
+ expect(doc.root.contents()[0].getAttr('x')).to.equal('4', 'redo 1.1');
+ doc.redo();
+ expect(doc.root.contents()[0].getAttr('x')).to.equal('5', 'redo 1.2');
+ doc.undo();
+ expect(doc.root.contents()[0].getAttr('x')).to.equal('4', 'undo 2.1');
+ doc.root.contents()[0].test('10');
+ expect(doc.root.contents()[0].getAttr('x')).to.equal('10', 'additional transformation');
+ expect(doc.redoStack.length).to.equal(0, 'transformation cleared redo stack');
+ doc.redo();
+ expect(doc.root.contents()[0].getAttr('x')).to.equal('10', 'empty redoStack so redo was noop');
+ doc.undo();
+ expect(doc.root.contents()[0].getAttr('x')).to.equal('4', 'undoing additional transformation');
+ doc.redo();
+ expect(doc.root.contents()[0].getAttr('x')).to.equal('10', 'redoing additional transformation');
+ });
+ });
+ });
+
+ it('smoke tests nested transformations', function() {
+ var doc = getDocumentFromXML('<div></div>');
+
+ doc.registerExtension({elementNode: {transformations: {
+ nested: function(v) {
+ this._$.attr('innerAttr', v);
+ this.triggerChangeEvent();
+ },
+ outer: function(v) {
+ this.nested(v);
+ this._$.attr('outerAttr', v);
+ this.triggerChangeEvent();
+ }
+ }}});
+
+ doc.root.outer('test1');
+ doc.root.outer('test2');
+
+ expect(doc.root.getAttr('innerAttr')).to.equal('test2');
+ expect(doc.root.getAttr('outerAttr')).to.equal('test2');
+
+ doc.undo();
+
+ expect(doc.root.getAttr('innerAttr')).to.equal('test1');
+ expect(doc.root.getAttr('outerAttr')).to.equal('test1');
+
+ doc.undo();
+
+ expect(doc.root.getAttr('innerAttr')).to.equal(undefined);
+ expect(doc.root.getAttr('outerAttr')).to.equal(undefined);
+
+ doc.redo();
+
+ expect(doc.root.getAttr('innerAttr')).to.equal('test1');
+ expect(doc.root.getAttr('outerAttr')).to.equal('test1');
+
+ doc.redo();
+
+ expect(doc.root.getAttr('innerAttr')).to.equal('test2');
+ expect(doc.root.getAttr('outerAttr')).to.equal('test2');
+
+ });
+
+ it('ignores transformation if document didn\'t emit change event', function() {
+ var doc = getDocumentFromXML('<div></div>');
+
+ doc.registerExtension({elementNode: {transformations: {
+ test: function() {
+ // empty
+ }
+ }}});
+
+ doc.root.test();
+ expect(doc.undoStack.length).to.equal(0);
+
+ });
+
+ describe('Transactions', function() {
+ it('allows to undo/redo series of transformations at once', function() {
+ var doc = getDocumentFromXML('<div></div>');
+
+ doc.registerExtension({
+ elementNode: {transformations: {
+ test: function(v) {
+ this.setAttr('test', v);
+ }
+ }}
+ });
+
+ doc.startTransaction();
+ doc.root.test('1');
+ doc.root.test('2');
+ doc.root.test('3');
+ doc.endTransaction();
+
+ doc.undo();
+ expect(doc.root.getAttr('test'), '1');
+ doc.redo();
+ expect(doc.root.getAttr('test'), '3');
+ doc.undo();
+ expect(doc.root.getAttr('test'), '1');
+ doc.redo();
+ expect(doc.root.getAttr('test'), '3');
+ });
fnp / fnpeditor.git / blobdiff