Bug 1346632 - Add a mochitest. r=kats

MozReview-Commit-ID: 2o3cpTaGG1V --HG-- extra : rebase_source : 25dc7749225bab57ebcce79533c105f3ff164dff
2017-03-15 17:49:50 -04:00 · 2017-03-15 17:49:50 -04:00 · fde5b63146
--- a/gfx/layers/apz/test/mochitest/helper_bug1346632.html
+++ b/gfx/layers/apz/test/mochitest/helper_bug1346632.html
@ -0,0 +1,77 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <meta charset="utf-8">
+  <meta name="viewport" content="width=device-width; initial-scale=1.0">
+  <title>Dragging the scrollbar on a page with a fixed-positioned element just past the right edge of the content</title>
+  <script type="application/javascript" src="apz_test_native_event_utils.js"></script>
+  <script type="application/javascript" src="apz_test_utils.js"></script>
+  <script type="application/javascript" src="/tests/SimpleTest/paint_listener.js"></script>
+  <style>
+    body {
+      height: 2000px;
+    }
+    #fixed {
+      width: 240px;
+      height: 100%;
+      position: fixed;
+      top: 0px;
+      right: -240px;
+      z-index: 1000;
+      overflow-y: scroll;
+    }
+    #fixed-content {
+      height: 2000px;
+    }
+  </style>
+  <script type="text/javascript">
+var root;
+var scrollPos;
+var haveScrolled = false;
+var generatedAll = false;
+
+// Be careful not to call subtestDone() until we've scrolled AND generated
+// all of the events.
+function maybeDone() {
+  if (haveScrolled && generatedAll) {
+    subtestDone();
+  }
+}
+
+function scrolled(e) {
+  // Test that we have scrolled
+  ok(root.scrollTop > scrollPos, "document scrolled after dragging scrollbar");
+  haveScrolled = true;
+  maybeDone();
+}
+
+function* test(testDriver) {
+  root = document.scrollingElement;
+  scrollPos = root.scrollTop;
+  document.addEventListener('scroll', scrolled);
+
+  var scrollbarX = (window.innerWidth + root.clientWidth) / 2;
+  // Move the mouse to the scrollbar
+  yield synthesizeNativeMouseEvent(root, scrollbarX, 100, nativeMouseMoveEventMsg(), testDriver);
+  // mouse down
+  yield synthesizeNativeMouseEvent(root, scrollbarX, 100, nativeMouseDownEventMsg(), testDriver);
+  // drag vertically
+  yield synthesizeNativeMouseEvent(root, scrollbarX, 150, nativeMouseMoveEventMsg(), testDriver);
+  // and release
+  yield synthesizeNativeMouseEvent(root, scrollbarX, 150, nativeMouseUpEventMsg(), testDriver);
+
+  generatedAll = true;
+  maybeDone();
+}
+
+waitUntilApzStable()
+.then(runContinuation(test));
+
+  </script>
+</head>
+<body>
+  <div id="fixed">
+    <p id="fixed-content"></p>
+  </div>
+</body>
+</html>
--- a/gfx/layers/apz/test/mochitest/mochitest.ini
+++ b/gfx/layers/apz/test/mochitest/mochitest.ini
@ -10,6 +10,7 @@
    helper_bug1280013.html
    helper_bug1285070.html
    helper_bug1299195.html
+    helper_bug1346632.html
    helper_click.html
    helper_div_pan.html
    helper_drag_click.html
--- a/gfx/layers/apz/test/mochitest/test_group_mouseevents.html
+++ b/gfx/layers/apz/test/mochitest/test_group_mouseevents.html
@ -17,7 +17,9 @@ var subtests = [
  // Sanity test for click but with some mouse movement between the down and up
  {'file': 'helper_drag_click.html'},
  // Test for dragging on a fake-scrollbar element that scrolls the page
-  {'file': 'helper_drag_scroll.html'}
+  {'file': 'helper_drag_scroll.html'},
+  // Test for dragging the scrollbar with a fixed-pos element overlaying it
+  {'file': 'helper_bug1346632.html'}
 ];

 if (isApzEnabled()) {