1 files changed, 29 insertions, 0 deletions
diff --git a/testing/web-platform/tests/resource-timing/image-sequence-of-events.html b/testing/web-platform/tests/resource-timing/image-sequence-of-events.html
new file mode 100644
index 0000000000..630fed78c9
--- /dev/null
+++ b/testing/web-platform/tests/resource-timing/image-sequence-of-events.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Test the sequence of events when reporting image timing.</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<body>
+<script>
+  function test_image_sequence(src, event, t) {
+    const image = document.createElement('img');
+    const absoluteURL = new URL(src, location.href).toString();
+    document.body.appendChild(image);
+    t.add_cleanup(() => image.remove());
+    return new Promise(resolve => {
+      image.addEventListener(event, t.step_func(() => {
+        assert_equals(performance.getEntriesByName(absoluteURL).length, 1);
+        resolve();
+      }));
+      image.src = src;
+    });
+  }
+  promise_test(t => test_image_sequence('resources/blue.png', 'load', t),
+  "An image should receive its load event after the ResourceTiming entry is available");
+
+  promise_test(t => test_image_sequence('resources/nothing-at-all.png', 'error', t),
+  "A non-existent (404) image should receive its error event after the ResourceTiming entry is available");
+
+  promise_test(t => test_image_sequence('resources/invalid.png', 'error', t),
+  "An invalid image should receive its error event after the ResourceTiming entry is available");
+</script>