michael@0: /*
michael@0:  * Copyright 2012, Mozilla Foundation and contributors
michael@0:  *
michael@0:  * Licensed under the Apache License, Version 2.0 (the "License");
michael@0:  * you may not use this file except in compliance with the License.
michael@0:  * You may obtain a copy of the License at
michael@0:  *
michael@0:  * http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  * Unless required by applicable law or agreed to in writing, software
michael@0:  * distributed under the License is distributed on an "AS IS" BASIS,
michael@0:  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
michael@0:  * See the License for the specific language governing permissions and
michael@0:  * limitations under the License.
michael@0:  */
michael@0: 
michael@0: 'use strict';
michael@0: // <INJECTED SOURCE:START>
michael@0: 
michael@0: // THIS FILE IS GENERATED FROM SOURCE IN THE GCLI PROJECT
michael@0: // DO NOT EDIT IT DIRECTLY
michael@0: 
michael@0: var exports = {};
michael@0: 
michael@0: var TEST_URI = "data:text/html;charset=utf-8,<p id='gcli-input'>gcli-testHistory.js</p>";
michael@0: 
michael@0: function test() {
michael@0:   return Task.spawn(function() {
michael@0:     let options = yield helpers.openTab(TEST_URI);
michael@0:     yield helpers.openToolbar(options);
michael@0:     gcli.addItems(mockCommands.items);
michael@0: 
michael@0:     yield helpers.runTests(options, exports);
michael@0: 
michael@0:     gcli.removeItems(mockCommands.items);
michael@0:     yield helpers.closeToolbar(options);
michael@0:     yield helpers.closeTab(options);
michael@0:   }).then(finish, helpers.handleError);
michael@0: }
michael@0: 
michael@0: // <INJECTED SOURCE:END>
michael@0: 
michael@0: // var assert = require('../testharness/assert');
michael@0: var History = require('gcli/ui/history').History;
michael@0: 
michael@0: exports.testSimpleHistory = function (options) {
michael@0:   var history = new History({});
michael@0:   history.add('foo');
michael@0:   history.add('bar');
michael@0:   assert.is(history.backward(), 'bar');
michael@0:   assert.is(history.backward(), 'foo');
michael@0: 
michael@0:   // Adding to the history again moves us back to the start of the history.
michael@0:   history.add('quux');
michael@0:   assert.is(history.backward(), 'quux');
michael@0:   assert.is(history.backward(), 'bar');
michael@0:   assert.is(history.backward(), 'foo');
michael@0: };
michael@0: 
michael@0: exports.testBackwardsPastIndex = function (options) {
michael@0:   var history = new History({});
michael@0:   history.add('foo');
michael@0:   history.add('bar');
michael@0:   assert.is(history.backward(), 'bar');
michael@0:   assert.is(history.backward(), 'foo');
michael@0: 
michael@0:   // Moving backwards past recorded history just keeps giving you the last
michael@0:   // item.
michael@0:   assert.is(history.backward(), 'foo');
michael@0: };
michael@0: 
michael@0: exports.testForwardsPastIndex = function (options) {
michael@0:   var history = new History({});
michael@0:   history.add('foo');
michael@0:   history.add('bar');
michael@0:   assert.is(history.backward(), 'bar');
michael@0:   assert.is(history.backward(), 'foo');
michael@0: 
michael@0:   // Going forward through the history again.
michael@0:   assert.is(history.forward(), 'bar');
michael@0: 
michael@0:   // 'Present' time.
michael@0:   assert.is(history.forward(), '');
michael@0: 
michael@0:   // Going to the 'future' just keeps giving us the empty string.
michael@0:   assert.is(history.forward(), '');
michael@0: };