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-rw-r--r--testing/web-platform/meta/css/css-transitions/CSSTransition-effect.tentative.html.ini5
-rw-r--r--testing/web-platform/tests/css/css-animations/transition-ready-time-offscreen.html44
-rw-r--r--testing/web-platform/tests/css/css-transitions/CSSTransition-effect.tentative.html7
3 files changed, 48 insertions, 8 deletions
diff --git a/testing/web-platform/meta/css/css-transitions/CSSTransition-effect.tentative.html.ini b/testing/web-platform/meta/css/css-transitions/CSSTransition-effect.tentative.html.ini
deleted file mode 100644
index 7896769374..0000000000
--- a/testing/web-platform/meta/css/css-transitions/CSSTransition-effect.tentative.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[CSSTransition-effect.tentative.html]
- [After setting a transition's effect to null, a new transition can be started]
- expected:
- if (os == "mac") and not debug: [PASS, FAIL]
- if (os == "android") and not debug: [PASS, FAIL]
diff --git a/testing/web-platform/tests/css/css-animations/transition-ready-time-offscreen.html b/testing/web-platform/tests/css/css-animations/transition-ready-time-offscreen.html
new file mode 100644
index 0000000000..cc3151b40b
--- /dev/null
+++ b/testing/web-platform/tests/css/css-animations/transition-ready-time-offscreen.html
@@ -0,0 +1,44 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Transitions start at the same time regardless of on-screen status</title>
+<link rel="help" href="https://drafts.csswg.org/css-animations-2/">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1888748">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+.transition {
+ width: 100px;
+ height: 100px;
+ background-color: blue;
+ transition: translate 10000ms linear;
+ will-change: translate;
+ translate: 0;
+}
+.offscreen {
+ background-color: purple;
+ translate: -1000px;
+}
+</style>
+<div class="transition"></div>
+<div class="transition offscreen"></div>
+<script>
+'use strict';
+
+promise_test(async t => {
+ let [a, b] = document.querySelectorAll(".transition");
+
+ // Ensure a paint happens to make sure a transition gets triggered (otherwise
+ // getAnimations() would flush sync, and maybe not trigger a transition if
+ // it's the first style of the elements).
+ await new Promise(r => requestAnimationFrame(() => requestAnimationFrame(r)));
+
+ // Trigger both transitions at the same time.
+ a.style.translate = b.style.translate = "100px";
+
+ let ta = a.getAnimations()[0];
+ let tb = b.getAnimations()[0];
+
+ await Promise.all([ta.ready, tb.ready]);
+ assert_equals(ta.startTime, tb.startTime, "Both transitions should've started at the same time");
+});
+</script>
diff --git a/testing/web-platform/tests/css/css-transitions/CSSTransition-effect.tentative.html b/testing/web-platform/tests/css/css-transitions/CSSTransition-effect.tentative.html
index b58c93d2e6..0952a7cd8f 100644
--- a/testing/web-platform/tests/css/css-transitions/CSSTransition-effect.tentative.html
+++ b/testing/web-platform/tests/css/css-transitions/CSSTransition-effect.tentative.html
@@ -85,12 +85,13 @@ promise_test(async t => {
div.style.left = '150px';
// This will run style update.
- assert_equals(div.getAnimations().length, 1);
+ const animations = div.getAnimations();
+ assert_equals(animations.length, 1);
- const new_transition = div.getAnimations()[0];
+ const new_transition = animations[0];
await new_transition.ready;
- assert_equals(getComputedStyle(div).left, '100px');
+ assert_not_equals(getComputedStyle(div).left, '150px');
}, 'After setting a transition\'s effect to null, a new transition can be started');
// This is a regression test for https://crbug.com/992668, where Chromium would