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-rw-r--r--testing/web-platform/tests/compat/webkit-radial-gradient-radii.html21
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diff --git a/testing/web-platform/tests/compat/webkit-radial-gradient-radii.html b/testing/web-platform/tests/compat/webkit-radial-gradient-radii.html
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--- /dev/null
+++ b/testing/web-platform/tests/compat/webkit-radial-gradient-radii.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<link rel="help" href="https://compat.spec.whatwg.org/#css-gradients-webkit-radial-gradient">
+<link rel="help" href="https://www.w3.org/TR/css3-images/#radial-gradients">
+<meta name="assert" content="Negative radii values are invalid.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+test(function() {
+ assert_true(CSS.supports("background-image", "-webkit-radial-gradient(1px 2px, 3% 4%, red, blue)"));
+}, '-webkit-radial-gradient accepts positive radii.');
+
+test(function() {
+ assert_true(CSS.supports("background-image", "-webkit-radial-gradient(1px 2px, 0% 4%, red, blue)"));
+}, '-webkit-radial-gradient accepts zero radii.');
+
+test(function() {
+ assert_false(CSS.supports("background-image", "-webkit-radial-gradient(1px 2px, -3% 4%, red, blue)"));
+ assert_false(CSS.supports("background-image", "-webkit-radial-gradient(1px 2px, 3% -4%, red, blue)"));
+ assert_false(CSS.supports("background-image", "-webkit-radial-gradient(1px 2px, -3% -4%, red, blue)"));
+}, '-webkit-radial-gradient rejects negative radii.');
+</script>