1 files changed, 49 insertions, 0 deletions
diff --git a/testing/web-platform/tests/web-animations/responsive/perspective.html b/testing/web-platform/tests/web-animations/responsive/perspective.html
new file mode 100644
index 0000000000..f32b4dbad3
--- /dev/null
+++ b/testing/web-platform/tests/web-animations/responsive/perspective.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<div id='container'>
+<div id='element'></div>
+</div>
+
+<script>
+var element = document.getElementById('element');
+var container = document.getElementById('container');
+
+test(function() {
+    element.style.fontSize = '10px';
+    var player = element.animate([{perspective: '3em'}, {perspective: '5em'}], 10);
+    player.pause();
+    player.currentTime = 5;
+    element.style.fontSize = '20px';
+    assert_equals(getComputedStyle(element).perspective, '80px');
+}, 'perspective responsive to style changes');
+
+test(function() {
+    element.style.fontSize = '10px';
+    var player = element.animate([{perspective: '40px'}, {perspective: 'calc(40px - 2em)'}], 10);
+    player.pause();
+
+    player.currentTime = 5;
+    element.style.fontSize = '40px';
+    assert_equals(getComputedStyle(element).perspective, '20px');
+
+    player.currentTime = 7.5;
+    assert_equals(getComputedStyle(element).perspective, '10px');
+}, 'perspective clamped to 0px on keyframes');
+
+test(function() {
+    container.style.perspective = 'none';
+    var player = element.animate([{perspective: 'inherit'}, {perspective: '20px'}], 4000);
+    player.pause();
+
+    player.currentTime = 1000;
+    assert_equals(getComputedStyle(element).perspective, 'none');
+
+    container.style.perspective = '100px';
+    assert_equals(getComputedStyle(element).perspective, '80px');
+
+    container.style.perspective = 'none';
+    assert_equals(getComputedStyle(element).perspective, 'none');
+}, 'perspective responsive to inherited changes');
+</script>