Move animations/composition/object-position-composition.html to WPT

Fredrik Söderquist · chromium-wpt-export-bot · commit 0a9f3dd29abf · 2025-11-21T10:24:08.000-08:00
Move the test and perform a mechanical rewrite: * Change assertComposition() to test_composition(). * Change 'is' to 'expect' in the expectation objects. * Include required testharness.js and framework. * Add link to spec. Bug: 4066383 Change-Id: I9a6fddc3cf042cefab7555a0c8833a8c5b8a99ec Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7185644 Auto-Submit: Fredrik Söderquist <fs@opera.com> Commit-Queue: Kevin Ellis <kevers@chromium.org> Reviewed-by: Kevin Ellis <kevers@chromium.org> Cr-Commit-Position: refs/heads/main@{#1548537}
diff --git a/css/css-images/animation/object-position-composition.html b/css/css-images/animation/object-position-composition.html
@@ -0,0 +1,68 @@
+<!DOCTYPE html>
+<title>object-position composition</title>
+<link rel="help" href="https://drafts.csswg.org/css-images-3/#the-object-position">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/interpolation-testcommon.js"></script>
+<body>
+<script>
+test_composition({
+  property: 'object-position',
+  underlying: '40px 60px',
+  addFrom: '60px 40px',
+  addTo: '160px 140px',
+}, [
+  {at: -0.25, expect: '75px 75px'},
+  {at: 0, expect: '100px 100px'},
+  {at: 0.25, expect: '125px 125px'},
+  {at: 0.5, expect: '150px 150px'},
+  {at: 0.75, expect: '175px 175px'},
+  {at: 1, expect: '200px 200px'},
+  {at: 1.25, expect: '225px 225px'},
+]);
+
+test_composition({
+  property: 'object-position',
+  underlying: 'top 20% left 40%',
+  addFrom: 'left 60% top 80%',
+  addTo: 'right 80% bottom 40%',
+}, [
+  {at: -0.25, expect: '110% 105%'},
+  {at: 0, expect: '100% 100%'},
+  {at: 0.25, expect: '90% 95%'},
+  {at: 0.5, expect: '80% 90%'},
+  {at: 0.75, expect: '70% 85%'},
+  {at: 1, expect: '60% 80%'},
+  {at: 1.25, expect: '50% 75%'},
+]);
+
+test_composition({
+  property: 'object-position',
+  underlying: '40px 60px',
+  replaceFrom: '100px 200px',
+  addTo: '160px 40px',
+}, [
+  {at: -0.25, expect: '75px 225px'},
+  {at: 0, expect: '100px 200px'},
+  {at: 0.25, expect: '125px 175px'},
+  {at: 0.5, expect: '150px 150px'},
+  {at: 0.75, expect: '175px 125px'},
+  {at: 1, expect: '200px 100px'},
+  {at: 1.25, expect: '225px 75px'},
+]);
+
+test_composition({
+  property: 'object-position',
+  underlying: '40px 60px',
+  addFrom: '60px 140px',
+  replaceTo: '200px 100px',
+}, [
+  {at: -0.25, expect: '75px 225px'},
+  {at: 0, expect: '100px 200px'},
+  {at: 0.25, expect: '125px 175px'},
+  {at: 0.5, expect: '150px 150px'},
+  {at: 0.75, expect: '175px 125px'},
+  {at: 1, expect: '200px 100px'},
+  {at: 1.25, expect: '225px 75px'},
+]);</script>
+</body>
