diff -r 000000000000 -r 6474c204b198 editor/libeditor/base/tests/test_selection_move_commands.xul
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/editor/libeditor/base/tests/test_selection_move_commands.xul	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,228 @@
+<?xml version="1.0"?>
+<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
+<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        xmlns:html="http://www.w3.org/1999/xhtml"
+        title="Test for nsSelectionMoveCommands">
+  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+
+<script class="testbody" type="application/javascript">
+<![CDATA[
+
+var prefs = Components.classes["@mozilla.org/preferences-service;1"]
+                      .getService(Components.interfaces.nsIPrefBranch);
+prefs.setBoolPref("general.smoothScroll", false);
+
+var winUtils = SpecialPowers.getDOMWindowUtils(window);
+winUtils.advanceTimeAndRefresh(100);
+
+function runTest() {
+  var tests = execTests();
+  function execNext() {
+    try {
+      winUtils.advanceTimeAndRefresh(100);
+      tests.next();
+      
+      winUtils.advanceTimeAndRefresh(100);
+      setTimeout(execNext, 20);
+    } catch (e) {}
+  }
+  execNext();
+}
+
+function execTests() {
+  var e = document.getElementById("edit");
+  var doc = e.contentDocument;
+  var win = e.contentWindow;
+  var root = doc.documentElement;
+  var body = doc.body;
+
+  body.style.fontSize='16px';
+  body.style.lineHeight='16px';
+  body.style.height='400px';
+  body.style.padding='0px';
+  body.style.margin='0px';
+  body.style.borderWidth='0px';
+
+  var sel = win.getSelection();
+  doc.designMode='on';
+  body.innerHTML = "1<br>2<br>3<br>4<br>5<br>6<br>7<br>8<br>9<br>10<br>11<br>12<br>";
+  win.focus();
+  // Flush out layout to make sure that the subdocument will be the size we
+  // expect by the time we try to scroll it.
+  is(body.getBoundingClientRect().height, 400,
+     "Body height should be what we set it to");
+  yield;
+
+  function doCommand(cmd) {
+    var controller = document.commandDispatcher.getControllerForCommand(cmd);
+    if (controller) {
+      controller.doCommand(cmd);
+    }
+  }
+
+  function testScrollCommand(cmd, expectTop) {
+    is(root.getBoundingClientRect().top, -expectTop, cmd);
+  }
+
+  function testMoveCommand(cmd, expectNode, expectOffset) {
+    doCommand(cmd);
+    is(sel.isCollapsed, true, "collapsed after " + cmd);
+    is(sel.anchorNode, expectNode, "node after " + cmd);
+    is(sel.anchorOffset, expectOffset, "offset after " + cmd);
+  }
+
+  function findChildNum(e, child) {
+    var i = 0;
+    var n = e.firstChild;
+    while (n && n != child) {
+      n = n.nextSibling;
+      ++i;
+    }
+    if (!n)
+      return -1;
+    return i;
+  }
+
+  function testPageMoveCommand(cmd, expectOffset) {
+    doCommand(cmd);
+    is(sel.isCollapsed, true, "collapsed after " + cmd);
+    is(sel.anchorOffset, expectOffset, "offset after " + cmd);
+    return findChildNum(body, sel.anchorNode);
+  }
+
+  function testSelectCommand(cmd, expectNode, expectOffset) {
+    var anchorNode = sel.anchorNode;
+    var anchorOffset = sel.anchorOffset;
+    doCommand(cmd);
+    is(sel.isCollapsed, false, "not collapsed after " + cmd);
+    is(sel.anchorNode, anchorNode, "anchor not moved after " + cmd);
+    is(sel.anchorOffset, anchorOffset, "anchor not moved after " + cmd);
+    is(sel.focusNode, expectNode, "node after " + cmd);
+    is(sel.focusOffset, expectOffset, "offset after " + cmd);
+  }
+
+  function testPageSelectCommand(cmd, expectOffset) {
+    var anchorNode = sel.anchorNode;
+    var anchorOffset = sel.anchorOffset;
+    doCommand(cmd);
+    is(sel.isCollapsed, false, "not collapsed after " + cmd);
+    is(sel.anchorNode, anchorNode, "anchor not moved after " + cmd);
+    is(sel.anchorOffset, anchorOffset, "anchor not moved after " + cmd);
+    is(sel.focusOffset, expectOffset, "offset after " + cmd);
+    return findChildNum(body, sel.focusNode);
+  }
+
+  function node(i) {
+    var n = body.firstChild;
+    while (i > 0) {
+      n = n.nextSibling;
+      --i;
+    }
+    return n;
+  }
+
+  doCommand("cmd_scrollBottom");
+  yield;
+  testScrollCommand("cmd_scrollBottom", root.scrollHeight - 100);
+  doCommand("cmd_scrollTop");
+  yield;
+  testScrollCommand("cmd_scrollTop", 0);
+
+  doCommand("cmd_scrollPageDown");
+  yield;
+  var pageHeight = -root.getBoundingClientRect().top;
+  ok(pageHeight > 0, "cmd_scrollPageDown works");
+  ok(pageHeight <= 100, "cmd_scrollPageDown doesn't scroll too much");
+  doCommand("cmd_scrollBottom");
+  doCommand("cmd_scrollPageUp");
+  yield;
+  testScrollCommand("cmd_scrollPageUp", root.scrollHeight - 100 - pageHeight);
+
+  doCommand("cmd_scrollTop");
+  doCommand("cmd_scrollLineDown");
+  yield;
+  var lineHeight = -root.getBoundingClientRect().top;
+  ok(lineHeight > 0, "Can scroll by lines");
+  doCommand("cmd_scrollBottom");
+  doCommand("cmd_scrollLineUp");
+  yield;
+  testScrollCommand("cmd_scrollLineUp", root.scrollHeight - 100 - lineHeight);
+
+  var runSelectionTests = function(selectWordNextNode, selectWordNextOffset) {
+    testMoveCommand("cmd_moveBottom", body, 23);
+    testMoveCommand("cmd_moveTop", node(0), 0);
+    testSelectCommand("cmd_selectBottom", body, 23);
+    doCommand("cmd_moveBottom");
+    testSelectCommand("cmd_selectTop", node(0), 0);
+
+    doCommand("cmd_moveTop");
+    testMoveCommand("cmd_lineNext", node(2), 0);
+    testMoveCommand("cmd_linePrevious", node(0), 0);
+    testSelectCommand("cmd_selectLineNext", node(2), 0);
+    doCommand("cmd_moveBottom");
+    testSelectCommand("cmd_selectLinePrevious", node(20), 2);
+
+    doCommand("cmd_moveBottom");
+    testMoveCommand("cmd_charPrevious", node(22), 1);
+    testMoveCommand("cmd_charNext", node(22), 2);
+    testSelectCommand("cmd_selectCharPrevious", node(22), 1);
+    doCommand("cmd_moveTop");
+    testSelectCommand("cmd_selectCharNext", node(0), 1);
+
+    doCommand("cmd_moveTop");
+    testMoveCommand("cmd_endLine", body, 1);
+    testMoveCommand("cmd_beginLine", node(0), 0);
+    testSelectCommand("cmd_selectEndLine", body, 1);
+    doCommand("cmd_moveBottom");
+    testSelectCommand("cmd_selectBeginLine", node(22), 0);
+
+    doCommand("cmd_moveBottom");
+    testMoveCommand("cmd_wordPrevious", node(22), 0);
+    testMoveCommand("cmd_wordNext", body, 23);
+    testSelectCommand("cmd_selectWordPrevious", node(22), 0);
+    doCommand("cmd_moveTop");
+    testSelectCommand("cmd_selectWordNext", selectWordNextNode, selectWordNextOffset);
+
+    doCommand("cmd_moveTop");
+    var lineNum = testPageMoveCommand("cmd_movePageDown", 0);
+    ok(lineNum > 0, "cmd_movePageDown works");
+    doCommand("cmd_moveBottom");
+    doCommand("cmd_beginLine");
+    is(testPageMoveCommand("cmd_movePageUp", 0), 22 - lineNum, "cmd_movePageUp");
+
+    doCommand("cmd_moveTop");
+    is(testPageSelectCommand("cmd_selectPageDown", 0), lineNum, "cmd_selectPageDown");
+    doCommand("cmd_moveBottom");
+    doCommand("cmd_beginLine");
+    is(testPageSelectCommand("cmd_selectPageUp", 0), 22 - lineNum, "cmd_selectPageUp");
+  }
+
+  try {
+    prefs.setBoolPref("layout.word_select.eat_space_to_next_word", false);
+    runSelectionTests(body, 1);
+    prefs.setBoolPref("layout.word_select.eat_space_to_next_word", true);
+    runSelectionTests(node(2), 0);
+  } finally {
+    prefs.clearUserPref("general.smoothScroll");
+    prefs.clearUserPref("layout.word_select.eat_space_to_next_word");
+  }
+
+  winUtils.restoreNormalRefresh();
+  SimpleTest.finish();
+}
+
+SimpleTest.waitForExplicitFinish();
+addLoadEvent(runTest);
+]]>
+</script>
+
+<body  id="html_body" xmlns="http://www.w3.org/1999/xhtml">
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=372685">Mozilla Bug 372685</a>
+<p id="display"></p>
+
+<pre id="test">
+</pre>
+<iframe id="edit" width="200" height="100" src="about:blank"/>
+</body>
+</window>