1 files changed, 61 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/dom/render-blocking/non-render-blocking-scripts.optional.html b/testing/web-platform/tests/html/dom/render-blocking/non-render-blocking-scripts.optional.html
new file mode 100644
index 0000000000..a4c32ea037
--- /dev/null
+++ b/testing/web-platform/tests/html/dom/render-blocking/non-render-blocking-scripts.optional.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<title>Tests when script is not implicitly potentially render-blocking</title>
+<link rel="help" href="https://github.com/whatwg/html/pull/7894">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="support/test-render-blocking.js"></script>
+
+<!--
+  The test is marked "optional" because even when the document is not
+  render-blocked, the user agent is still free to take other factors, which are
+  not limited by the spec, into consideration and therefore decide not to
+  render. However, it is still more desirable if rendering starts
+  immediately/soon.
+-->
+
+<script class="test" data="parser-inserted async script" async
+        src="support/dummy-1.js?pipe=trickle(d1)&async"></script>
+<script class="test" data="parser-inserted defer script" defer
+        src="support/dummy-1.js?pipe=trickle(d1)&defer"></script>
+<script class="test" data="parser-inserted module script" type="module"
+        src="support/dummy-1.mjs?pipe=trickle(d1)"></script>
+<script class="test" data="parser-inserted async module script" type="module"
+        async src="support/dummy-1.mjs?pipe=trickle(d1)&async"></script>
+
+<script>
+function addTestScriptElement(title, attributes) {
+  let element = document.createElement('script');
+  element.className = 'test';
+  element.setAttribute('data', title);
+  Object.assign(element, attributes);
+  document.head.appendChild(element);
+}
+
+addTestScriptElement('script-inserted script', {src: 'support/dummy-1.js?pipe=trickle(d1)&dynamic'});
+addTestScriptElement('script-inserted sync script', {async: false, src: 'support/dummy-1.js?pipe=trickle(d1)&dynamicSync'});
+addTestScriptElement('script-inserted module script', {type: 'module', src: 'support/dummy-1.mjs?pipe=trickle(d1)&dynamic'});
+</script>
+
+<div id="dummy">Some text</div>
+
+<script>
+const testElements = [...document.querySelectorAll('.test')];
+const loadObservers = testElements.map(element => new LoadObserver(element));
+
+promise_setup(async () => {
+  // Test cases are run after rendering is unblocked.
+  await new Promise(resolve => requestAnimationFrame(resolve));
+});
+
+for (let index = 0; index < testElements.length; ++index) {
+  promise_test(
+    async () => assert_false(loadObservers[index].finished),
+    testElements[index].getAttribute('data') + ' is not implicitly render-blocking');
+}
+
+for (let index = 0; index < testElements.length; ++index) {
+  promise_test(
+    () => loadObservers[index].load,
+    testElements[index].getAttribute('data') + ' should eventually be loaded and evaluated');
+}
+</script>