view-transitions: Add WPT for exit transitions with LayoutObjects.
Before [1], ViewTransition had a bug which would incorrectly assume that
a PaintLayer generating anonymous LayoutObject corresponds to a node
which is participating in a ViewTransition.
While the previous patch fixed this bug, it was intended to be a no-op.
This change adds a test to ensure the error case is covered in VT WPTs.
[1]: https://chromium-review.googlesource.com/c/chromium/src/+/4367418
R=chrishtr@chromium.org
Fixed: 1443134
Change-Id: I259fdda6d4e49464cedb28c9b6c120d35ec998d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4528215
Commit-Queue: Chris Harrelson <chrishtr@chromium.org>
Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Auto-Submit: Khushal Sagar <khushalsagar@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1143496}
diff --git a/css/css-view-transitions/exit-transition-with-anonymous-layout-object-ref.html b/css/css-view-transitions/exit-transition-with-anonymous-layout-object-ref.html
new file mode 100644
index 0000000..10e04ac
--- /dev/null
+++ b/css/css-view-transitions/exit-transition-with-anonymous-layout-object-ref.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<title>View transitions: exit transition with layout objects that don't have a node (ref)</title>
+<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+
+<style>
+body {
+ width: 100vw;
+ height: 100vh;
+ background: pink;
+}
+
+#target {
+ width: 100px;
+ height: 100px;
+ background: blue;
+}
+</style>
+<div id="target"></div>
diff --git a/css/css-view-transitions/exit-transition-with-anonymous-layout-object.html b/css/css-view-transitions/exit-transition-with-anonymous-layout-object.html
new file mode 100644
index 0000000..ea2d17b
--- /dev/null
+++ b/css/css-view-transitions/exit-transition-with-anonymous-layout-object.html
@@ -0,0 +1,64 @@
+<!DOCTYPE html>
+<html class=reftest-wait>
+<title>View transitions: exit transition with layout objects that don't have a node</title>
+<link rel="help" href="https://drafts.csswg.org/css-view-transitions-1/">
+<link rel="author" href="mailto:khushalsagar@chromium.org">
+<link rel="match" href="exit-transition-with-anonymous-layout-object-ref.html">
+
+<script src="/common/reftest-wait.js"></script>
+<style>
+body {
+ width: 100vw;
+ height: 100vh;
+}
+
+#target {
+ width: 100px;
+ height: 100px;
+ background: blue;
+ view-transition-name: target;
+}
+
+#hidden {
+ width: 10px;
+ height: 10px;
+ background: grey;
+ view-transition-name: hidden;
+}
+
+fieldset {
+ width: 100px;
+ height: 100px;
+ background: lightgreen;
+ overflow: clip;
+}
+
+html::view-transition { background: pink; }
+html::view-transition-group(root) { visibility: hidden; }
+html::view-transition-group(hidden) { animation-duration: 300s; }
+html::view-transition-image-pair(hidden) { animation: unset; opacity: 0; }
+html::view-transition-old(target) {
+ animation: unset;
+ opacity: 1;
+}
+</style>
+<div id="target"></div>
+<fieldset id="anonymous">hi</fieldset>
+<div id=hidden class=hidden></div>
+
+<script>
+failIfNot(document.startViewTransition, "Missing document.startViewTransition");
+
+async function runTest() {
+ let t = document.startViewTransition(() => {
+ target.style.viewTransitionName = "none";
+ });
+ await t.ready;
+ anonymous.style.position = "relative";
+ requestAnimationFrame(() => requestAnimationFrame(() =>
+ requestAnimationFrame(() => requestAnimationFrame(takeScreenshot))
+ ));
+}
+onload = () => requestAnimationFrame(() => requestAnimationFrame(runTest));
+</script>
+
