1 files changed, 24 insertions, 0 deletions
diff --git a/testing/web-platform/tests/resource-timing/iframe-with-download.html b/testing/web-platform/tests/resource-timing/iframe-with-download.html
new file mode 100644
index 0000000000..9583024dd8
--- /dev/null
+++ b/testing/web-platform/tests/resource-timing/iframe-with-download.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Test the sequence of events when reporting iframe timing.</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/resource-loaders.js"></script>
+<body>
+<script>
+    promise_test(async t => {
+        const href = new URL('resources/download.asis', location.href);
+        const iframe = document.createElement('iframe');
+        iframe.src = href;
+        const errored = new Promise(resolve => iframe.addEventListener('error', resolve));
+        const loaded = new Promise(resolve => iframe.addEventListener('load', resolve));
+        document.body.appendChild(iframe);
+        const timeout = 2000;
+        t.add_cleanup(() => iframe.remove());
+        const expired = new Promise(resolve => t.step_timeout(resolve, timeout));
+        await Promise.any([loaded, expired, errored]);
+        const entries = performance.getEntriesByType('resource').filter(({name}) => name.startsWith(href));
+        assert_equals(entries.length, 0);
+    }, 'Iframes should not report resource timing for non-handled mime-types (downloads)');
+</script>
+</body>
+\ No newline at end of file