diff -r 000000000000 -r 6474c204b198 browser/metro/base/tests/mochitest/browser_selection_textarea.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/metro/base/tests/mochitest/browser_selection_textarea.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,115 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 gWindow = null;
+var gFrame = null;
+
+const kCommonWaitMs = 5000;
+const kCommonPollMs = 100;
+
+///////////////////////////////////////////////////
+// text area tests
+///////////////////////////////////////////////////
+
+function setUpAndTearDown() {
+  emptyClipboard();
+  if (gWindow)
+    clearSelection(gWindow);
+  if (gFrame)
+    clearSelection(gFrame);
+  yield waitForCondition(function () {
+      return !SelectionHelperUI.isSelectionUIVisible;
+    }, kCommonWaitMs, kCommonPollMs);
+  InputSourceHelper.isPrecise = false;
+  InputSourceHelper.fireUpdate();
+}
+
+gTests.push({
+  desc: "normalize browser",
+  setUp: setUpAndTearDown,
+  tearDown: setUpAndTearDown,
+  run: function test() {
+    info(chromeRoot + "browser_selection_textarea.html");
+    yield addTab(chromeRoot + "browser_selection_textarea.html");
+
+    yield waitForCondition(function () {
+      return !BrowserUI.isStartTabVisible;
+      }, 10000, 100);
+
+    yield hideContextUI();
+
+    gWindow = Browser.selectedTab.browser.contentWindow;
+  },
+});
+
+gTests.push({
+  desc: "textarea selection and drag",
+  setUp: setUpAndTearDown,
+  tearDown: setUpAndTearDown,
+  run: function test() {
+    // work around for buggy context menu display
+    yield waitForMs(100);
+
+    let textarea = gWindow.document.getElementById("inputtext");
+    textarea.focus();
+
+    let promise = waitForEvent(document, "popupshown");
+    sendContextMenuClickToElement(gWindow, textarea, 20, 10);
+    yield promise;
+
+    checkContextUIMenuItemVisibility(["context-select",
+                                      "context-select-all"]);
+
+    let menuItem = document.getElementById("context-select");
+    ok(menuItem, "menu item exists");
+    ok(!menuItem.hidden, "menu item visible");
+    let popupPromise = waitForEvent(document, "popuphidden");
+    sendElementTap(gWindow, menuItem);
+    yield popupPromise;
+    ok(popupPromise && !(popupPromise instanceof Error), "promise error");
+
+    yield waitForCondition(function () {
+        return SelectionHelperUI.isSelectionUIVisible;
+      }, kCommonWaitMs, kCommonPollMs);
+
+    is(SelectionHelperUI.isActive, true, "selection active");
+    is(getTrimmedSelection(textarea).toString(), "Alice", "selection test");
+
+    let xpos = SelectionHelperUI.endMark.xPos;
+    let ypos = SelectionHelperUI.endMark.yPos + 10;
+
+    var touchdrag = new TouchDragAndHold();
+
+    // end marker and off the text area to the right
+    yield touchdrag.start(gWindow, xpos, ypos, 1200, 400);
+    let token = "(end)";
+    yield waitForCondition(function () {
+      let selection = getTrimmedSelection(textarea).toString();
+      if (selection.length < token.length ||
+          selection.substring(selection.length - token.length) != token) {
+        return false;
+      }
+      return true;
+    }, 5000, 100);
+
+    touchdrag.end();
+    touchdrag = null;
+
+    yield waitForCondition(function () {
+        return !SelectionHelperUI.hasActiveDrag;
+      }, kCommonWaitMs, kCommonPollMs);
+    yield SelectionHelperUI.pingSelectionHandler();
+  },
+});
+
+function test() {
+  if (!isLandscapeMode()) {
+    todo(false, "browser_selection_tests need landscape mode to run.");
+    return;
+  }
+  runTests();
+}