1 files changed, 44 insertions, 0 deletions
diff --git a/testing/web-platform/tests/clipboard-apis/async-navigator-clipboard-read-resource-load.https.html b/testing/web-platform/tests/clipboard-apis/async-navigator-clipboard-read-resource-load.https.html
new file mode 100644
index 0000000000..d1e3019e7f
--- /dev/null
+++ b/testing/web-platform/tests/clipboard-apis/async-navigator-clipboard-read-resource-load.https.html
@@ -0,0 +1,44 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>Async Clipboard.read() should not trigger resource loading</title>
+<link rel="help" href="https://w3c.github.io/clipboard-apis/#dom-clipboard-read">
+<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1315563">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="resources/user-activation.js"></script>
+
+<body>Body needed for test_driver.click()
+<p><button id="button">Put payload in the clipboard</button></p>
+<div id="output"></div>
+
+<script>
+button.onclick = () => document.execCommand('copy');
+document.oncopy = ev => {
+  ev.preventDefault();
+  ev.clipboardData.setData(
+      'text/html',
+      '<img src="https://example.com/oops">');
+};
+
+promise_test(async test => {
+  let loadObserved = false;
+  const observer = new PerformanceObserver(() => loadObserved = true);
+  observer.observe({type: 'resource'});
+  await test_driver.set_permission({name: 'clipboard-read'}, 'granted');
+  await test_driver.click(button);
+
+  await waitForUserActivation();
+  const items = await navigator.clipboard.read();
+  const htmlBlob = await items[0].getType("text/html");
+  const html = await htmlBlob.text();
+
+  assert_equals(html, '<img src="https://example.com/oops">');
+
+  // Allow resource loading to start asynchronously
+  await new Promise(resolve => test.step_timeout(resolve, 100));
+  assert_false(loadObserved, 'Should not observe resource loading');
+});
+</script>
+</body>