Scroll from script should trigger a reflow

Scrolling from script should flow layout and send a display list to
WebRender. This allows all of the scroll nodes to exist in WebRender
before asking it to move the node.

See https://gist.github.com/paulirish/5d52fb081b3570c81e3a.
Fixes #29659.

components/layout_thread/lib.rs

@@ -645,9 +645,6 @@ impl LayoutThread {
             Msg::CreateLayoutThread(..) => LayoutHangAnnotation::CreateLayoutThread,
             Msg::SetFinalUrl(..) => LayoutHangAnnotation::SetFinalUrl,
             Msg::SetScrollStates(..) => LayoutHangAnnotation::SetScrollStates,
-            Msg::UpdateScrollStateFromScript(..) => {
-                LayoutHangAnnotation::UpdateScrollStateFromScript
-            },
             Msg::RegisterPaint(..) => LayoutHangAnnotation::RegisterPaint,
             Msg::SetNavigationStart(..) => LayoutHangAnnotation::SetNavigationStart,
         };
@@ -753,19 +750,6 @@ impl LayoutThread {
             Msg::SetScrollStates(new_scroll_states) => {
                 self.set_scroll_states(new_scroll_states, possibly_locked_rw_data);
             },
-            Msg::UpdateScrollStateFromScript(state) => {
-                let mut rw_data = possibly_locked_rw_data.lock();
-                rw_data
-                    .scroll_offsets
-                    .insert(state.scroll_id, state.scroll_offset);
-
-                let point = Point2D::new(-state.scroll_offset.x, -state.scroll_offset.y);
-                self.webrender_api.send_scroll_node(
-                    webrender_api::units::LayoutPoint::from_untyped(point),
-                    state.scroll_id,
-                    webrender_api::ScrollClamping::ToContentBounds,
-                );
-            },
             Msg::CollectReports(reports_chan) => {
                 self.collect_reports(reports_chan, possibly_locked_rw_data);
             },
@@ -1250,7 +1234,9 @@ impl LayoutThread {
                             rw_data.inner_window_dimensions_response = None;
                         },
                     },
-                    ReflowGoal::Full | ReflowGoal::TickAnimations => {},
+                    ReflowGoal::Full |
+                    ReflowGoal::TickAnimations |
+                    ReflowGoal::UpdateScrollNode(_) => {},
                 }
                 return;
             },
@@ -1619,10 +1605,26 @@ impl LayoutThread {
                         .cloned();
                 },
             },
+            ReflowGoal::UpdateScrollNode(scroll_state) => {
+                self.update_scroll_node_state(&scroll_state, rw_data);
+            },
             ReflowGoal::Full | ReflowGoal::TickAnimations => {},
         }
     }
 
+    fn update_scroll_node_state(&self, state: &ScrollState, rw_data: &mut LayoutThreadData) {
+        rw_data
+            .scroll_offsets
+            .insert(state.scroll_id, state.scroll_offset);
+
+        let point = Point2D::new(-state.scroll_offset.x, -state.scroll_offset.y);
+        self.webrender_api.send_scroll_node(
+            webrender_api::units::LayoutPoint::from_untyped(point),
+            state.scroll_id,
+            webrender_api::ScrollClamping::ToContentBounds,
+        );
+    }
+
     fn set_scroll_states<'a, 'b>(
         &mut self,
         new_scroll_states: Vec<ScrollState>,

components/layout_thread_2020/lib.rs

@@ -616,9 +616,6 @@ impl LayoutThread {
             Msg::CreateLayoutThread(..) => LayoutHangAnnotation::CreateLayoutThread,
             Msg::SetFinalUrl(..) => LayoutHangAnnotation::SetFinalUrl,
             Msg::SetScrollStates(..) => LayoutHangAnnotation::SetScrollStates,
-            Msg::UpdateScrollStateFromScript(..) => {
-                LayoutHangAnnotation::UpdateScrollStateFromScript
-            },
             Msg::RegisterPaint(..) => LayoutHangAnnotation::RegisterPaint,
             Msg::SetNavigationStart(..) => LayoutHangAnnotation::SetNavigationStart,
         };
@@ -724,19 +721,6 @@ impl LayoutThread {
             Msg::SetScrollStates(new_scroll_states) => {
                 self.set_scroll_states(new_scroll_states, possibly_locked_rw_data);
             },
-            Msg::UpdateScrollStateFromScript(state) => {
-                let mut rw_data = possibly_locked_rw_data.lock();
-                rw_data
-                    .scroll_offsets
-                    .insert(state.scroll_id, state.scroll_offset);
-
-                let point = Point2D::new(-state.scroll_offset.x, -state.scroll_offset.y);
-                self.webrender_api.send_scroll_node(
-                    webrender_api::units::LayoutPoint::from_untyped(point),
-                    state.scroll_id,
-                    webrender_api::ScrollClamping::ToContentBounds,
-                );
-            },
             Msg::CollectReports(reports_chan) => {
                 self.collect_reports(reports_chan, possibly_locked_rw_data);
             },
@@ -935,7 +919,9 @@ impl LayoutThread {
                                 .cloned();
                         },
                     },
-                    ReflowGoal::Full | ReflowGoal::TickAnimations => {},
+                    ReflowGoal::Full |
+                    ReflowGoal::TickAnimations |
+                    ReflowGoal::UpdateScrollNode(_) => {},
                 }
                 return;
             },
@@ -1256,10 +1242,26 @@ impl LayoutThread {
                     rw_data.inner_window_dimensions_response = None;
                 },
             },
+            ReflowGoal::UpdateScrollNode(scroll_state) => {
+                self.update_scroll_node_state(&scroll_state, rw_data);
+            },
             ReflowGoal::Full | ReflowGoal::TickAnimations => {},
         }
     }
 
+    fn update_scroll_node_state(&self, state: &ScrollState, rw_data: &mut LayoutThreadData) {
+        rw_data
+            .scroll_offsets
+            .insert(state.scroll_id, state.scroll_offset);
+
+        let point = Point2D::new(-state.scroll_offset.x, -state.scroll_offset.y);
+        self.webrender_api.send_scroll_node(
+            webrender_api::units::LayoutPoint::from_untyped(point),
+            state.scroll_id,
+            webrender_api::ScrollClamping::ToContentBounds,
+        );
+    }
+
     fn set_scroll_states<'a, 'b>(
         &mut self,
         new_scroll_states: Vec<ScrollState>,

components/script/dom/window.rs

@@ -168,26 +168,27 @@ enum WindowState {
 #[derive(Debug, MallocSizeOf)]
 pub enum ReflowReason {
     CachedPageNeededReflow,
-    RefreshTick,
-    FirstLoad,
-    KeyEvent,
-    MouseEvent,
-    Query,
-    Timer,
-    Viewport,
-    WindowResize,
     DOMContentLoaded,
     DocumentLoaded,
-    StylesheetLoaded,
+    ElementStateChanged,
-    ImageLoaded,
+    FirstLoad,
-    RequestAnimationFrame,
-    WebFontLoaded,
-    WorkletLoaded,
     FramedContentChanged,
     IFrameLoadEvent,
+    ImageLoaded,
+    KeyEvent,
     MissingExplicitReflow,
-    ElementStateChanged,
+    MouseEvent,
     PendingReflow,
+    Query,
+    RefreshTick,
+    RequestAnimationFrame,
+    ScrollFromScript,
+    StylesheetLoaded,
+    Timer,
+    Viewport,
+    WebFontLoaded,
+    WindowResize,
+    WorkletLoaded,
 }
 
 #[dom_struct]
@@ -1755,15 +1756,13 @@ impl Window {
         // TODO Step 1
         // TODO(mrobinson, #18709): Add smooth scrolling support to WebRender so that we can
         // properly process ScrollBehavior here.
-        match self.layout_chan() {
+        self.reflow(
-            Some(chan) => chan
+            ReflowGoal::UpdateScrollNode(ScrollState {
-                .send(Msg::UpdateScrollStateFromScript(ScrollState {
                 scroll_id,
                 scroll_offset: Vector2D::new(-x, -y),
-                }))
+            }),
-                .unwrap(),
+            ReflowReason::ScrollFromScript,
-            None => warn!("Layout channel unavailable"),
+        );
-        }
     }
 
     pub fn update_viewport_for_scroll(&self, x: f32, y: f32) {
@@ -2719,6 +2718,7 @@ fn debug_reflow_events(id: PipelineId, reflow_goal: &ReflowGoal, reason: &Reflow
     let goal_string = match *reflow_goal {
         ReflowGoal::Full => "\tFull",
         ReflowGoal::TickAnimations => "\tTickAnimations",
+        ReflowGoal::UpdateScrollNode(_) => "\tUpdateScrollNode",
         ReflowGoal::LayoutQuery(ref query_msg, _) => match query_msg {
             &QueryMsg::ContentBoxQuery(_n) => "\tContentBoxQuery",
             &QueryMsg::ContentBoxesQuery(_n) => "\tContentBoxesQuery",

components/script_layout_interface/message.rs

@@ -81,10 +81,6 @@ pub enum Msg {
     /// Tells layout about the new scrolling offsets of each scrollable stacking context.
     SetScrollStates(Vec<ScrollState>),
 
-    /// Tells layout about a single new scrolling offset from the script. The rest will
-    /// remain untouched and layout won't forward this back to script.
-    UpdateScrollStateFromScript(ScrollState),
-
     /// Tells layout that script has added some paint worklet modules.
     RegisterPaint(Atom, Vec<Atom>, Box<dyn Painter>),
 
@@ -125,6 +121,10 @@ pub enum ReflowGoal {
     Full,
     TickAnimations,
     LayoutQuery(QueryMsg, u64),
+
+    /// Tells layout about a single new scrolling offset from the script. The rest will
+    /// remain untouched and layout won't forward this back to script.
+    UpdateScrollNode(ScrollState),
 }
 
 impl ReflowGoal {
@@ -132,7 +132,7 @@ impl ReflowGoal {
     /// be present or false if it only needs stacking-relative positions.
     pub fn needs_display_list(&self) -> bool {
         match *self {
-            ReflowGoal::Full | ReflowGoal::TickAnimations => true,
+            ReflowGoal::Full | ReflowGoal::TickAnimations | ReflowGoal::UpdateScrollNode(_) => true,
             ReflowGoal::LayoutQuery(ref querymsg, _) => match *querymsg {
                 QueryMsg::NodesFromPointQuery(..) |
                 QueryMsg::TextIndexQuery(..) |
@@ -155,7 +155,7 @@ impl ReflowGoal {
     /// false if a layout_thread display list is sufficient.
     pub fn needs_display(&self) -> bool {
         match *self {
-            ReflowGoal::Full | ReflowGoal::TickAnimations => true,
+            ReflowGoal::Full | ReflowGoal::TickAnimations | ReflowGoal::UpdateScrollNode(_) => true,
             ReflowGoal::LayoutQuery(ref querymsg, _) => match *querymsg {
                 QueryMsg::NodesFromPointQuery(..) |
                 QueryMsg::TextIndexQuery(..) |

components/script_traits/lib.rs

@@ -791,7 +791,7 @@ bitflags! {
 }
 
 /// The scroll state of a stacking context.
-#[derive(Clone, Copy, Debug, Deserialize, Serialize)]
+#[derive(Clone, Copy, Debug, Deserialize, PartialEq, Serialize)]
 pub struct ScrollState {
     /// The ID of the scroll root.
     pub scroll_id: ExternalScrollId,

tests/wpt/metadata-layout-2020/css/css-position/positon-absolute-scrollable-overflow-001.html.ini

@@ -11,12 +11,6 @@
   [.containing-block 4]
     expected: FAIL
 
-  [.containing-block 5]
-    expected: FAIL
-
-  [.containing-block 6]
-    expected: FAIL
-
   [.containing-block 7]
     expected: FAIL
 
@@ -32,11 +26,17 @@
   [.containing-block 11]
     expected: FAIL
 
+  [.containing-block 14]
+    expected: FAIL
+
+  [.containing-block 5]
+    expected: FAIL
+
+  [.containing-block 6]
+    expected: FAIL
+
   [.containing-block 12]
     expected: FAIL
 
   [.containing-block 13]
     expected: FAIL
-
-  [.containing-block 14]
-    expected: FAIL

tests/wpt/metadata-layout-2020/css/css-position/sticky/position-sticky-escape-scroller-002.html.ini

@@ -1,2 +0,0 @@
-[position-sticky-escape-scroller-002.html]
-  expected: FAIL

tests/wpt/metadata-layout-2020/css/css-position/sticky/position-sticky-overflow-padding.html.ini

@@ -1,6 +1,6 @@
 [position-sticky-overflow-padding.html]
-  [A sticky element should be offset by ancestor padding even when stuck]
-    expected: FAIL
-
   [Ancestor overflow padding does not allow a sticky element to escape its container]
     expected: FAIL
+
+  [A sticky element should be offset by ancestor padding even when stuck]
+    expected: FAIL

tests/wpt/metadata-layout-2020/css/css-position/z-index-blend-will-change-overlapping-layers.html.ini

@@ -1,2 +0,0 @@
-[z-index-blend-will-change-overlapping-layers.html]
-  expected: FAIL

tests/wpt/metadata/css/CSS2/floats-clear/clear-on-parent-and-child.html.ini

@@ -1,3 +0,0 @@
-[clear-on-parent-and-child.html]
-  bug: https://github.com/servo/webrender/issues/3078
-  expected: FAIL

tests/wpt/metadata/css/css-backgrounds/background-attachment-local/attachment-local-positioning-2.html.ini

@@ -1,3 +0,0 @@
-[attachment-local-positioning-2.html]
-  bug: https://github.com/servo/webrender/issues/3078
-  expected: FAIL

tests/wpt/metadata/css/css-backgrounds/background-attachment-local/attachment-scroll-positioning-1.html.ini

@@ -1,3 +0,0 @@
-[attachment-scroll-positioning-1.html]
-  bug: https://github.com/servo/webrender/issues/3078
-  expected: FAIL

tests/wpt/metadata/css/css-backgrounds/scroll-positioned-multiple-background-images.html.ini

@@ -1,3 +0,0 @@
-[scroll-positioned-multiple-background-images.html]
-  bug: https://github.com/servo/webrender/issues/3078
-  expected: FAIL

tests/wpt/metadata/css/css-position/containing-block-change-scrollframe.html.ini

@@ -1,2 +0,0 @@
-[containing-block-change-scrollframe.html]
-  expected: FAIL

tests/wpt/metadata/css/css-position/sticky/position-sticky-escape-scroller-001.html.ini

@@ -1,2 +0,0 @@
-[position-sticky-escape-scroller-001.html]
-  expected: FAIL

tests/wpt/metadata/css/css-position/sticky/position-sticky-escape-scroller-002.html.ini

@@ -1,2 +0,0 @@
-[position-sticky-escape-scroller-002.html]
-  expected: FAIL

tests/wpt/metadata/css/css-position/sticky/position-sticky-escape-scroller-003.html.ini

@@ -1,2 +0,0 @@
-[position-sticky-escape-scroller-003.html]
-  expected: FAIL

tests/wpt/metadata/css/css-position/sticky/position-sticky-escape-scroller-004.html.ini

@@ -1,2 +0,0 @@
-[position-sticky-escape-scroller-004.html]
-  expected: FAIL

tests/wpt/metadata/css/css-position/sticky/position-sticky-rendering.html.ini

@@ -0,0 +1,2 @@
+[position-sticky-rendering.html]
+  expected: FAIL

tests/wpt/metadata/css/css-position/z-index-blend-will-change-overlapping-layers.html.ini

@@ -1,2 +0,0 @@
-[z-index-blend-will-change-overlapping-layers.html]
-  expected: FAIL

tests/wpt/metadata/css/cssom-view/CaretPosition-001.html.ini

@@ -1,3 +0,0 @@
-[CaretPosition-001.html]
-  [Element at (400, 100)]
-    expected: FAIL

tests/wpt/metadata/css/cssom-view/elementScroll-002.html.ini

@@ -4,4 +4,3 @@
 
   [simple scroll with style: 'padding' and 'overflow: scroll']
     expected: FAIL
-

tests/wpt/metadata/css/cssom-view/scroll-behavior-default-css.html.ini

@@ -2,8 +2,8 @@
   [Testing default value of scroll-behavior]
     expected: FAIL
 
-  [Instant scrolling of an element with default scroll-behavior]
-    expected: FAIL
-
   [Smooth scrolling of an element with default scroll-behavior]
     expected: FAIL
+
+  [Instant scrolling of an element with default scroll-behavior]
+    expected: FAIL

tests/wpt/metadata/css/cssom-view/scroll-behavior-element.html.ini

@@ -2,15 +2,6 @@
   [Testing scrollOptions' behavior for Element.scroll* and scroll-behavior on an element]
     expected: FAIL
 
-  [Element with auto scroll-behavior ; scroll() with default behavior]
-    expected: FAIL
-
-  [Element with auto scroll-behavior ; scroll() with auto behavior]
-    expected: FAIL
-
-  [Element with auto scroll-behavior ; scroll() with instant behavior]
-    expected: FAIL
-
   [Element with auto scroll-behavior ; scroll() with smooth behavior]
     expected: FAIL
 
@@ -20,21 +11,9 @@
   [Element with smooth scroll-behavior ; scroll() with auto behavior]
     expected: FAIL
 
-  [Element with smooth scroll-behavior ; scroll() with instant behavior]
-    expected: FAIL
-
   [Element with smooth scroll-behavior ; scroll() with smooth behavior]
     expected: FAIL
 
-  [Element with auto scroll-behavior ; scrollTo() with default behavior]
-    expected: FAIL
-
-  [Element with auto scroll-behavior ; scrollTo() with auto behavior]
-    expected: FAIL
-
-  [Element with auto scroll-behavior ; scrollTo() with instant behavior]
-    expected: FAIL
-
   [Element with auto scroll-behavior ; scrollTo() with smooth behavior]
     expected: FAIL
 
@@ -44,21 +23,9 @@
   [Element with smooth scroll-behavior ; scrollTo() with auto behavior]
     expected: FAIL
 
-  [Element with smooth scroll-behavior ; scrollTo() with instant behavior]
-    expected: FAIL
-
   [Element with smooth scroll-behavior ; scrollTo() with smooth behavior]
     expected: FAIL
 
-  [Element with auto scroll-behavior ; scrollBy() with default behavior]
-    expected: FAIL
-
-  [Element with auto scroll-behavior ; scrollBy() with auto behavior]
-    expected: FAIL
-
-  [Element with auto scroll-behavior ; scrollBy() with instant behavior]
-    expected: FAIL
-
   [Element with auto scroll-behavior ; scrollBy() with smooth behavior]
     expected: FAIL
 
@@ -68,9 +35,6 @@
   [Element with smooth scroll-behavior ; scrollBy() with auto behavior]
     expected: FAIL
 
-  [Element with smooth scroll-behavior ; scrollBy() with instant behavior]
-    expected: FAIL
-
   [Element with smooth scroll-behavior ; scrollBy() with smooth behavior]
     expected: FAIL
 
@@ -98,17 +62,53 @@
   [Element with smooth scroll-behavior ; scrollIntoView() with smooth behavior]
     expected: FAIL
 
-  [Set scrollLeft to element with auto scroll-behavior]
-    expected: FAIL
-
   [Set scrollLeft to element with smooth scroll-behavior]
     expected: FAIL
 
-  [Set scrollTop to element with auto scroll-behavior]
-    expected: FAIL
-
   [Set scrollTop to element with smooth scroll-behavior]
     expected: FAIL
 
+  [Element with auto scroll-behavior ; scroll() with default behavior]
+    expected: FAIL
+
+  [Element with auto scroll-behavior ; scroll() with auto behavior]
+    expected: FAIL
+
+  [Element with auto scroll-behavior ; scroll() with instant behavior]
+    expected: FAIL
+
+  [Element with smooth scroll-behavior ; scroll() with instant behavior]
+    expected: FAIL
+
+  [Element with auto scroll-behavior ; scrollTo() with default behavior]
+    expected: FAIL
+
+  [Element with auto scroll-behavior ; scrollTo() with auto behavior]
+    expected: FAIL
+
+  [Element with auto scroll-behavior ; scrollTo() with instant behavior]
+    expected: FAIL
+
+  [Element with smooth scroll-behavior ; scrollTo() with instant behavior]
+    expected: FAIL
+
+  [Element with auto scroll-behavior ; scrollBy() with default behavior]
+    expected: FAIL
+
+  [Element with auto scroll-behavior ; scrollBy() with auto behavior]
+    expected: FAIL
+
+  [Element with auto scroll-behavior ; scrollBy() with instant behavior]
+    expected: FAIL
+
+  [Element with smooth scroll-behavior ; scrollBy() with instant behavior]
+    expected: FAIL
+
+  [Set scrollLeft to element with auto scroll-behavior]
+    expected: FAIL
+
+  [Set scrollTop to element with auto scroll-behavior]
+    expected: FAIL
+
   [Aborting an ongoing smooth scrolling on an element with another smooth scrolling]
     expected: FAIL

tests/wpt/metadata/css/cssom-view/scroll-behavior-smooth-positions.html.ini

@@ -2,66 +2,65 @@
   [Scroll positions when performing smooth scrolling from (1000, 0) to (500, 250) using scrollIntoView() ]
     expected: FAIL
 
-  [Scroll positions when performing smooth scrolling from (1000, 500) to (500, 250) using scrollTo() ]
-    expected: FAIL
-
   [Scroll positions when performing smooth scrolling from (0, 0) to (500, 250) using scrollIntoView() ]
     expected: FAIL
 
   [Scroll positions when performing smooth scrolling from (1000, 500) to (500, 250) using scrollIntoView() ]
     expected: FAIL
 
-  [Scroll positions when performing smooth scrolling from (0, 500) to (500, 250) using scrollTo() ]
-    expected: FAIL
-
   [Scroll positions when performing smooth scrolling from (0, 500) to (500, 250) using scrollIntoView() ]
     expected: FAIL
 
-  [Scroll positions when performing smooth scrolling from (0, 500) to (500, 250) using scrollBy() ]
-    expected: FAIL
-
-  [Scroll positions when performing smooth scrolling from (1000, 0) to (500, 250) using scrollBy() ]
-    expected: FAIL
-
-  [Scroll positions when aborting a smooth scrolling with an instant scrolling]
-    expected: FAIL
-
-  [Scroll positions when performing smooth scrolling from (1000, 500) to (500, 250) using scrollBy() ]
-    expected: FAIL
-
-  [Scroll positions when performing smooth scrolling from (1000, 0) to (500, 250) using scroll() ]
-    expected: FAIL
-
-  [Scroll positions when performing smooth scrolling from (1000, 0) to (500, 250) using scrollTo() ]
-    expected: FAIL
-
-  [Scroll positions when performing smooth scrolling from (0, 500) to (500, 250) using scroll() ]
-    expected: FAIL
-
-  [Scroll positions when aborting a smooth scrolling with another smooth scrolling]
-    expected: FAIL
-
-  [Scroll positions when performing smooth scrolling from (1000, 500) to (500, 250) using scroll() ]
-    expected: FAIL
-
   [Scroll positions when performing smooth scrolling from (0, 0) to (500, 250) using scroll() ]
     expected: FAIL
 
+  [Scroll positions when performing smooth scrolling from (1000, 0) to (500, 250) using scroll() ]
+    expected: FAIL
+
+  [Scroll positions when performing smooth scrolling from (0, 500) to (500, 250) using scroll() ]
+    expected: FAIL
+
+  [Scroll positions when performing smooth scrolling from (1000, 500) to (500, 250) using scroll() ]
+    expected: FAIL
+
   [Scroll positions when performing smooth scrolling from (0, 0) to (500, 250) using scrollTo() ]
     expected: FAIL
 
+  [Scroll positions when performing smooth scrolling from (1000, 0) to (500, 250) using scrollTo() ]
+    expected: FAIL
+
+  [Scroll positions when performing smooth scrolling from (0, 500) to (500, 250) using scrollTo() ]
+    expected: FAIL
+
+  [Scroll positions when performing smooth scrolling from (1000, 500) to (500, 250) using scrollTo() ]
+    expected: FAIL
+
   [Scroll positions when performing smooth scrolling from (0, 0) to (500, 250) using scrollBy() ]
     expected: FAIL
 
-  [Scroll positions when performing smooth scrolling from 500 to 250 by setting scrollTop ]
+  [Scroll positions when performing smooth scrolling from (1000, 0) to (500, 250) using scrollBy() ]
     expected: FAIL
 
-  [Scroll positions when performing smooth scrolling from 1000 to 500 by setting scrollLeft ]
+  [Scroll positions when performing smooth scrolling from (0, 500) to (500, 250) using scrollBy() ]
+    expected: FAIL
+
+  [Scroll positions when performing smooth scrolling from (1000, 500) to (500, 250) using scrollBy() ]
     expected: FAIL
 
   [Scroll positions when performing smooth scrolling from 0 to 500 by setting scrollLeft ]
     expected: FAIL
 
+  [Scroll positions when performing smooth scrolling from 1000 to 500 by setting scrollLeft ]
+    expected: FAIL
+
   [Scroll positions when performing smooth scrolling from 0 to 250 by setting scrollTop ]
     expected: FAIL
 
+  [Scroll positions when performing smooth scrolling from 500 to 250 by setting scrollTop ]
+    expected: FAIL
+
+  [Scroll positions when aborting a smooth scrolling with another smooth scrolling]
+    expected: FAIL
+
+  [Scroll positions when aborting a smooth scrolling with an instant scrolling]
+    expected: FAIL