1 files changed, 52 insertions, 0 deletions
diff --git a/testing/web-platform/tests/speculation-rules/prerender/navigator-plugins.tentative.html b/testing/web-platform/tests/speculation-rules/prerender/navigator-plugins.tentative.html
new file mode 100644
index 0000000000..192d4b3cd1
--- /dev/null
+++ b/testing/web-platform/tests/speculation-rules/prerender/navigator-plugins.tentative.html
@@ -0,0 +1,52 @@
+<!DOCTYPE html>
+<!--
+Note that `navigator.plugins` attribute is outdated in the HTML but we
+keep this test until major browsers actually stop supporting it.
+https://html.spec.whatwg.org/C/#dom-navigator-plugins
+-->
+<title>Same-origin prerendering can access navigator.plugins</title>
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/speculation-rules/prerender/resources/utils.js"></script>
+<body>
+<script>
+
+setup(() => {
+  assertSpeculationRulesIsSupported();
+  assert_implements_optional(
+      'plugins' in navigator, 'navigator.plugins is not provided.'
+    );
+});
+
+promise_test(async t => {
+  const uid = token();
+  const bc = new PrerenderChannel('prerender-channel', uid);
+  t.add_cleanup(_ => bc.close());
+
+  const gotMessage = new Promise(resolve => {
+    bc.addEventListener('message', e => {
+      resolve(e.data);
+    }, {
+      once: true
+    });
+  });
+
+  // Start prerendering a page that attempts to access the navigator.plugins.
+  startPrerendering(`resources/navigator-plugins.html?uid=${uid}`);
+  const result = await gotMessage;
+  const plugins = JSON.parse(result);
+  assert_equals(plugins.length, navigator.plugins.length);
+  for (let i = 0; i < plugins.length; ++i) {
+    const expected_plugin = navigator.plugins[i];
+    assert_equals(plugins[i].pluginLength, expected_plugin.length);
+    for (let j = 0; j < plugins[i].pluginLength; ++j) {
+      assert_equals(plugins[i].pluginTypes[j], expected_plugin[j].type,
+                    `type of navigator.plugins[${i}].plugin[${j}]`);
+    }
+  }
+}, 'prerendering page should be able to access the navigator.plugins');
+
+</script>
+</body>