The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/browser/devtools/shared/test/unit/test_undoStack.js	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,98 @@
     1.4 +/* -*- Mode: Javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
     1.5 +/* vim: set ts=2 et sw=2 tw=80: */
     1.6 +/* Any copyright is dedicated to the Public Domain.
     1.7 +   http://creativecommons.org/publicdomain/zero/1.0/ */
     1.8 +
     1.9 +const Cu = Components.utils;
    1.10 +let {Loader} = Cu.import("resource://gre/modules/commonjs/toolkit/loader.js", {});
    1.11 +
    1.12 +let loader = new Loader.Loader({
    1.13 +  paths: {
    1.14 +    "": "resource://gre/modules/commonjs/",
    1.15 +    "devtools": "resource:///modules/devtools",
    1.16 +  },
    1.17 +  globals: {},
    1.18 +});
    1.19 +let require = Loader.Require(loader, { id: "undo-test" })
    1.20 +
    1.21 +let {UndoStack} = require("devtools/shared/undo");
    1.22 +
    1.23 +const MAX_SIZE = 5;
    1.24 +
    1.25 +function run_test()
    1.26 +{
    1.27 +  let str = "";
    1.28 +  let stack = new UndoStack(MAX_SIZE);
    1.29 +
    1.30 +  function add(ch) {
    1.31 +    stack.do(function() {
    1.32 +      str += ch;
    1.33 +    }, function() {
    1.34 +      str = str.slice(0, -1);
    1.35 +    });
    1.36 +  }
    1.37 +
    1.38 +  do_check_false(stack.canUndo());
    1.39 +  do_check_false(stack.canRedo());
    1.40 +
    1.41 +  // Check adding up to the limit of the size
    1.42 +  add("a");
    1.43 +  do_check_true(stack.canUndo());
    1.44 +  do_check_false(stack.canRedo());
    1.45 +
    1.46 +  add("b");
    1.47 +  add("c");
    1.48 +  add("d");
    1.49 +  add("e");
    1.50 +
    1.51 +  do_check_eq(str, "abcde");
    1.52 +
    1.53 +  // Check a simple undo+redo
    1.54 +  stack.undo();
    1.55 +
    1.56 +  do_check_eq(str, "abcd");
    1.57 +  do_check_true(stack.canRedo());
    1.58 +
    1.59 +  stack.redo();
    1.60 +  do_check_eq(str, "abcde")
    1.61 +  do_check_false(stack.canRedo());
    1.62 +
    1.63 +  // Check an undo followed by a new action
    1.64 +  stack.undo();
    1.65 +  do_check_eq(str, "abcd");
    1.66 +
    1.67 +  add("q");
    1.68 +  do_check_eq(str, "abcdq");
    1.69 +  do_check_false(stack.canRedo());
    1.70 +
    1.71 +  stack.undo();
    1.72 +  do_check_eq(str, "abcd");
    1.73 +  stack.redo();
    1.74 +  do_check_eq(str, "abcdq");
    1.75 +
    1.76 +  // Revert back to the beginning of the queue...
    1.77 +  while (stack.canUndo()) {
    1.78 +    stack.undo();
    1.79 +  }
    1.80 +  do_check_eq(str, "");
    1.81 +
    1.82 +  // Now put it all back....
    1.83 +  while (stack.canRedo()) {
    1.84 +    stack.redo();
    1.85 +  }
    1.86 +  do_check_eq(str, "abcdq");
    1.87 +
    1.88 +  // Now go over the undo limit...
    1.89 +  add("1");
    1.90 +  add("2");
    1.91 +  add("3");
    1.92 +
    1.93 +  do_check_eq(str, "abcdq123");
    1.94 +
    1.95 +  // And now undoing the whole stack should only undo 5 actions.
    1.96 +  while (stack.canUndo()) {
    1.97 +    stack.undo();
    1.98 +  }
    1.99 +
   1.100 +  do_check_eq(str, "abc");
   1.101 +}