palemoon-dev/platform/devtools/client/commandline/test/browser_gcli_history.js

/*
 * Copyright 2012, Mozilla Foundation and contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

"use strict";

// THIS FILE IS GENERATED FROM SOURCE IN THE GCLI PROJECT
// PLEASE TALK TO SOMEONE IN DEVELOPER TOOLS BEFORE EDITING IT

const exports = {};

function test() {
  helpers.runTestModule(exports, "browser_gcli_history.js");
}

// var assert = require('../testharness/assert');
var History = require("gcli/ui/history").History;

exports.testSimpleHistory = function (options) {
  var history = new History({});
  history.add("foo");
  history.add("bar");
  assert.is(history.backward(), "bar");
  assert.is(history.backward(), "foo");

  // Adding to the history again moves us back to the start of the history.
  history.add("quux");
  assert.is(history.backward(), "quux");
  assert.is(history.backward(), "bar");
  assert.is(history.backward(), "foo");
};

exports.testBackwardsPastIndex = function (options) {
  var history = new History({});
  history.add("foo");
  history.add("bar");
  assert.is(history.backward(), "bar");
  assert.is(history.backward(), "foo");

  // Moving backwards past recorded history just keeps giving you the last
  // item.
  assert.is(history.backward(), "foo");
};

exports.testForwardsPastIndex = function (options) {
  var history = new History({});
  history.add("foo");
  history.add("bar");
  assert.is(history.backward(), "bar");
  assert.is(history.backward(), "foo");

  // Going forward through the history again.
  assert.is(history.forward(), "bar");

  // 'Present' time.
  assert.is(history.forward(), "");

  // Going to the 'future' just keeps giving us the empty string.
  assert.is(history.forward(), "");
};