1 files changed, 72 insertions, 0 deletions
diff --git a/browser/devtools/sourceeditor/test/browser_bug684546_reset_undo.js b/browser/devtools/sourceeditor/test/browser_bug684546_reset_undo.js
new file mode 100644
index 000000000..4fbb01bde
--- /dev/null
+++ b/browser/devtools/sourceeditor/test/browser_bug684546_reset_undo.js
@@ -0,0 +1,72 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+let tempScope = {};
+Cu.import("resource:///modules/source-editor.jsm", tempScope);
+let SourceEditor = tempScope.SourceEditor;
+
+let testWin;
+let editor;
+
+function test()
+{
+  waitForExplicitFinish();
+
+  const windowUrl = "data:application/vnd.mozilla.xul+xml,<?xml version='1.0'?>" +
+    "<window xmlns='http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul'" +
+    " title='test for bug 684546 - reset undo' width='300' height='500'>" +
+    "<box flex='1'/></window>";
+  const windowFeatures = "chrome,titlebar,toolbar,centerscreen,resizable,dialog=no";
+
+  testWin = Services.ww.openWindow(null, windowUrl, "_blank", windowFeatures, null);
+  testWin.addEventListener("load", function onWindowLoad() {
+    testWin.removeEventListener("load", onWindowLoad, false);
+    waitForFocus(initEditor, testWin);
+  }, false);
+}
+
+function initEditor()
+{
+  let box = testWin.document.querySelector("box");
+
+  editor = new SourceEditor();
+  editor.init(box, {}, editorLoaded);
+}
+
+function editorLoaded()
+{
+  editor.setText("First");
+  editor.setText("Second", 5);
+  is(editor.getText(), "FirstSecond", "text set correctly.");
+  editor.undo();
+  is(editor.getText(), "First", "undo works.");
+  editor.redo();
+  is(editor.getText(), "FirstSecond", "redo works.");
+  editor.resetUndo();
+  ok(!editor.canUndo(), "canUndo() is correct");
+  ok(!editor.canRedo(), "canRedo() is correct");
+  editor.undo();
+  is(editor.getText(), "FirstSecond", "reset undo works correctly");
+  editor.setText("Third", 11);
+  is(editor.getText(), "FirstSecondThird", "text set correctly");
+  editor.undo();
+  is(editor.getText(), "FirstSecond", "undo works after reset");
+  editor.redo();
+  is(editor.getText(), "FirstSecondThird", "redo works after reset");
+  editor.resetUndo();
+  ok(!editor.canUndo(), "canUndo() is correct (again)");
+  ok(!editor.canRedo(), "canRedo() is correct (again)");
+  editor.undo();
+  is(editor.getText(), "FirstSecondThird", "reset undo still works correctly");
+
+  finish();
+}
+
+registerCleanupFunction(function() {
+  editor.destroy();
+  testWin.close();
+  testWin = editor = null;
+});