Bug 1440118 - Mochitest for scrolling over unlayerized subframe with overscroll-behavior. r=kats
MozReview-Commit-ID: JbMpBQqBm2y
new file mode 100644
--- /dev/null
+++ b/gfx/layers/apz/test/mochitest/helper_scroll_overscroll_behavior.html
@@ -0,0 +1,54 @@
+<head>
+ <meta name="viewport" content="width=device-width; initial-scale=1.0">
+ <title>Wheel-scrolling over inactive subframe with overscroll-behavior</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>
+ <script type="application/javascript">
+
+function* test(testDriver) {
+ var utils = SpecialPowers.getDOMWindowUtils(window);
+ var isWebRender = (utils.layerManagerType == 'WebRender');
+ if (!isWebRender) {
+ // After bug 1440112 is fixed, the test can be enabled
+ // for non-WebRender as well.
+ ok(true, "This test is only enabled for WebRender");
+ return;
+ }
+
+ var subframe = document.getElementById('scroll');
+
+ // scroll over the middle of the subframe, and make sure that the page
+ // does not scroll.
+ var scrollPos = subframe.scrollTop;
+ var waitForScroll = false; // don't wait for a scroll event, it will never come
+ yield moveMouseAndScrollWheelOver(subframe, 100, 100, testDriver, waitForScroll);
+ ok(window.scrollY == 0, "overscroll-behavior was respected");
+}
+
+waitUntilApzStable()
+.then(runContinuation(test))
+.then(subtestDone);
+
+ </script>
+ <style>
+ #scroll {
+ width: 200px;
+ height: 200px;
+ overflow: scroll;
+ overscroll-behavior: contain;
+ }
+ #scrolled {
+ width: 200px;
+ height: 1000px; /* so the subframe has room to scroll */
+ background: linear-gradient(red, blue); /* so you can see it scroll */
+ }
+ </style>
+</head>
+<body>
+ <div id="scroll">
+ <div id="scrolled"></div>
+ </div>
+ <div style="height: 5000px;"></div><!-- So the page is scrollable as well -->
+</body>
+</head>
--- a/gfx/layers/apz/test/mochitest/mochitest.ini
+++ b/gfx/layers/apz/test/mochitest/mochitest.ini
@@ -24,16 +24,17 @@
helper_key_scroll.html
helper_long_tap.html
helper_override_root.html
helper_override_subdoc.html
helper_scroll_inactive_perspective.html
helper_scroll_inactive_zindex.html
helper_scroll_on_position_fixed.html
helper_scroll_over_scrollbar.html
+ helper_scroll_overscroll_behavior.html
helper_scroll_tables_perspective.html
helper_scrollto_tap.html
helper_subframe_style.css
helper_tall.html
helper_tap.html
helper_tap_fullzoom.html
helper_tap_passive.html
helper_touch_action.html
--- a/gfx/layers/apz/test/mochitest/test_group_wheelevents.html
+++ b/gfx/layers/apz/test/mochitest/test_group_wheelevents.html
@@ -21,23 +21,29 @@ var prefs = [
// For helper_scroll_over_scrollbar, we need to set a pref to force
// layerization of the scrollbar track to reproduce the bug being fixed.
// Otherwise, the bug only manifests with overlay scrollbars on macOS,
// or in a XUL RCD, both of which are hard to materialize in a test.
var scrollbar_prefs = prefs.slice(); // make a copy
scrollbar_prefs.push(["layout.scrollbars.always-layerize-track", true]);
+// For helper_scroll_overscroll_behavior, we need to set the APZ content
+// response timeout to 0, so we exercise the fallback codepath.
+var timeout_prefs = prefs.slice(); // make a copy
+timeout_prefs.push(["apz.content_response_timeout", 0]);
+
var subtests = [
{'file': 'helper_scroll_on_position_fixed.html', 'prefs': prefs},
{'file': 'helper_bug1271432.html', 'prefs': prefs},
{'file': 'helper_scroll_inactive_perspective.html', 'prefs': prefs},
{'file': 'helper_scroll_inactive_zindex.html', 'prefs': prefs},
{'file': 'helper_scroll_over_scrollbar.html', 'prefs': scrollbar_prefs},
{'file': 'helper_scroll_tables_perspective.html', 'prefs': prefs},
+ {'file': 'helper_scroll_overscroll_behavior.html', 'prefs': timeout_prefs},
];
if (isApzEnabled()) {
SimpleTest.waitForExplicitFinish();
window.onload = function() {
runSubtestsSeriallyInFreshWindows(subtests)
.then(SimpleTest.finish);
};