Bug 1575899 [wpt PR 18614] - MathML: Wait for Ahem fonts to be ready for displaystyle dynamic tests., a=testonly

Automatic update from web-platform-tests
MathML: Wait for Ahem fonts to be ready for displaystyle dynamic tests. (#18614)

--

wpt-commits: 3ccf6da39967fe9e9c296c4b9342e3de8dcf4c98
wpt-pr: 18614

Author: fred-wang

testing/web-platform/tests/mathml/relations/css-styling/displaystyle-013.html

@@ -21,7 +21,10 @@
         document.getElementById("m6").removeAttribute("displaystyle");
         document.documentElement.removeAttribute("class");
       }
-      window.addEventListener("load", doTest);
+      window.addEventListener("load", function() {
+        // Delay the check to workaround WebKit's bug https://webkit.org/b/174030.
+        requestAnimationFrame(() => { document.fonts.ready.then(doTest); });
+      });
     </script>
     <link rel="stylesheet" href="/fonts/ahem.css">
     <style>

testing/web-platform/tests/mathml/relations/css-styling/displaystyle-014.html

@@ -18,7 +18,10 @@
                  setAttribute('mathbackground', 'red');
         document.documentElement.removeAttribute("class");
       }
-      window.addEventListener("load", doTest);
+      window.addEventListener("load", function() {
+        // Delay the check to workaround WebKit's bug https://webkit.org/b/174030.
+        requestAnimationFrame(() => { document.fonts.ready.then(doTest); });
+      });
     </script>
     <link rel="stylesheet" href="/fonts/ahem.css">
     <style>