test: run webmessaging/broadcastchannel WPT

Refs: #38803

test/fixtures/wpt/webmessaging/broadcastchannel/basics.any.js

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+async_test(t => {
+    let c1 = new BroadcastChannel('eventType');
+    let c2 = new BroadcastChannel('eventType');
+
+    c2.onmessage = t.step_func(e => {
+        assert_true(e instanceof MessageEvent);
+        assert_equals(e.target, c2);
+        assert_equals(e.type, 'message');
+        assert_equals(e.origin, location.origin, 'origin');
+        assert_equals(e.data, 'hello world');
+        assert_equals(e.source, null, 'source');
+        t.done();
+      });
+    c1.postMessage('hello world');
+  }, 'postMessage results in correct event');
+
+async_test(t => {
+    let c1 = new BroadcastChannel('order');
+    let c2 = new BroadcastChannel('order');
+    let c3 = new BroadcastChannel('order');
+
+    let events = [];
+    let doneCount = 0;
+    let handler = t.step_func(e => {
+      events.push(e);
+      if (e.data == 'done') {
+        doneCount++;
+        if (doneCount == 2) {
+          assert_equals(events.length, 6);
+          assert_equals(events[0].target, c2, 'target for event 0');
+          assert_equals(events[0].data, 'from c1');
+          assert_equals(events[1].target, c3, 'target for event 1');
+          assert_equals(events[1].data, 'from c1');
+          assert_equals(events[2].target, c1, 'target for event 2');
+          assert_equals(events[2].data, 'from c3');
+          assert_equals(events[3].target, c2, 'target for event 3');
+          assert_equals(events[3].data, 'from c3');
+          assert_equals(events[4].target, c1, 'target for event 4');
+          assert_equals(events[4].data, 'done');
+          assert_equals(events[5].target, c3, 'target for event 5');
+          assert_equals(events[5].data, 'done');
+          t.done();
+        }
+      }
+    });
+    c1.onmessage = handler;
+    c2.onmessage = handler;
+    c3.onmessage = handler;
+
+    c1.postMessage('from c1');
+    c3.postMessage('from c3');
+    c2.postMessage('done');
+  }, 'messages are delivered in port creation order');
+
+async_test(t => {
+    let c1 = new BroadcastChannel('closed');
+    let c2 = new BroadcastChannel('closed');
+    let c3 = new BroadcastChannel('closed');
+
+    c2.onmessage = t.unreached_func();
+    c2.close();
+    c3.onmessage = t.step_func(() => t.done());
+    c1.postMessage('test');
+  }, 'messages aren\'t delivered to a closed port');
+
+ async_test(t => {
+    let c1 = new BroadcastChannel('closed');
+    let c2 = new BroadcastChannel('closed');
+    let c3 = new BroadcastChannel('closed');
+
+    c2.onmessage = t.unreached_func();
+    c3.onmessage = t.step_func(() => t.done());
+    c1.postMessage('test');
+    c2.close();
+}, 'messages aren\'t delivered to a port closed after calling postMessage.');
+
+async_test(t => {
+    let c1 = new BroadcastChannel('create-in-onmessage');
+    let c2 = new BroadcastChannel('create-in-onmessage');
+
+    c2.onmessage = t.step_func(e => {
+        assert_equals(e.data, 'first');
+        c2.close();
+        let c3 = new BroadcastChannel('create-in-onmessage');
+        c3.onmessage = t.step_func(event => {
+            assert_equals(event.data, 'done');
+            t.done();
+          });
+        c1.postMessage('done');
+      });
+    c1.postMessage('first');
+    c2.postMessage('second');
+  }, 'closing and creating channels during message delivery works correctly');
+
+async_test(t => {
+    let c1 = new BroadcastChannel('close-in-onmessage');
+    let c2 = new BroadcastChannel('close-in-onmessage');
+    let c3 = new BroadcastChannel('close-in-onmessage');
+    let events = [];
+    c1.onmessage = e => events.push('c1: ' + e.data);
+    c2.onmessage = e => events.push('c2: ' + e.data);
+    c3.onmessage = e => events.push('c3: ' + e.data);
+
+    // c2 closes itself when it receives the first message
+    c2.addEventListener('message', e => {
+        c2.close();
+      });
+
+    c3.addEventListener('message', t.step_func(e => {
+        if (e.data == 'done') {
+          assert_array_equals(events, [
+              'c2: first',
+              'c3: first',
+              'c3: done']);
+          t.done();
+        }
+      }));
+    c1.postMessage('first');
+    c1.postMessage('done');
+  }, 'Closing a channel in onmessage prevents already queued tasks from firing onmessage events');

test/fixtures/wpt/webmessaging/broadcastchannel/blobs.html

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+<!DOCTYPE html>
+<meta charset=utf-8>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+async_test(t => {
+    const c1 = new BroadcastChannel('blob');
+    const c2 = new BroadcastChannel('blob');
+    const c3 = new BroadcastChannel('blob');
+
+    let readCount = 0;
+    c2.onmessage = t.step_func(e => {
+        // check blob
+        assert_true('blob' in e.data);
+        assert_true(e.data.blob instanceof Blob);
+        assert_equals(e.data.blob.size, 6);
+        const reader = new FileReader();
+        reader.onerror = t.unreached_func();
+        reader.onload = t.step_func(() => {
+            assert_equals(reader.result, 'foobar');
+            if (++readCount == 2)
+              t.done();
+          });
+        reader.readAsText(e.data.blob);
+      });
+    c3.onmessage = c2.onmessage;
+    (() => {
+      c1.postMessage({blob: new Blob(['foo', 'bar'])});
+    })();
+    // TODO(https://github.com/web-platform-tests/wpt/issues/7899): Change to
+    // some sort of cross-browser GC trigger.
+    if (self.gc) self.gc();
+  }, 'Blobs work on BroadcastChannel');
+
+async_test(t => {
+    const c1 = new BroadcastChannel('blobworker');
+    const c2 = new BroadcastChannel('blobworker');
+    const events = [];
+
+    const verifyEvents = function() {
+        assert_equals(events.length, 5);
+        assert_equals(events[0], 'from worker');
+        assert_equals(events[1], 'from worker');
+        assert_true(events[2].blob instanceof Blob);
+        assert_equals(events[2].blob.size, 11);
+        assert_true(events[3].blob instanceof Blob);
+        assert_equals(events[3].blob.size, 11);
+        assert_equals(events[4], 'done');
+        const reader = new FileReader();
+        reader.onerror = t.unreached_func();
+        reader.onload = t.step_func(() => {
+            assert_equals(reader.result, 'hello-world');
+            t.done();
+          });
+        reader.readAsText(events[3].blob);
+    };
+
+    let receivedDone = false;
+    let receivedWorkerDone = false;
+
+    c1.onmessage = e => events.push(e.data);
+    c2.onmessage = e => events.push(e.data);
+    c2.addEventListener('message', t.step_func(e => {
+        if (e.data.blob)
+          c1.postMessage('done');
+        if (e.data === 'done')
+          receivedDone = true;
+        if (receivedDone && receivedWorkerDone)
+          verifyEvents();
+      }));
+
+    const worker = new Worker('resources/worker.js');
+    worker.onmessage = t.step_func(e => {
+        receivedWorkerDone = true;
+        if (receivedDone && receivedWorkerDone)
+          verifyEvents();
+      });
+    worker.postMessage({channel: 'blobworker'});
+    worker.postMessage({blob: ['hello-world']});
+
+  }, 'Blobs work with workers on BroadcastChannel');
+
+</script>

test/fixtures/wpt/webmessaging/broadcastchannel/cross-origin.html

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+<!DOCTYPE html>
+<meta charset=utf-8>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<!-- Pull in the with_iframe helper function from the service worker tests -->
+<script src="/service-workers/service-worker/resources/test-helpers.sub.js"></script>
+<body>
+<script>
+
+const events = [];
+
+function testCompletion(t) {
+  return new Promise((resolve) => {
+    window.addEventListener("message", t.step_func(e => {
+      if (e.data == 'done') {
+        assert_equals(events.length, 0);
+        resolve();
+      }
+    }));
+  });
+}
+
+promise_test(async t => {
+
+  const bc0 = new BroadcastChannel('no-cross-origin-messages');
+  bc0.onmessage = e => {window.events.push(e);};
+
+  const testResults = testCompletion(t);
+  const url = get_host_info().HTTPS_NOTSAMESITE_ORIGIN +
+    '/webmessaging/broadcastchannel/resources/cross-origin.html';
+  await with_iframe(url);
+
+  return testResults;
+}, "Messages aren't delivered across origins");
+
+</script>
+</body>

test/fixtures/wpt/webmessaging/broadcastchannel/cross-partition.https.tentative.html

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+<!DOCTYPE html>
+<meta charset=utf-8>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/common/dispatcher/dispatcher.js"></script>
+<!-- Pull in executor_path needed by newPopup / newIframe -->
+<script src="/html/cross-origin-embedder-policy/credentialless/resources/common.js"></script>
+<!-- Pull in newPopup / newIframe -->
+<script src="/html/cross-origin-embedder-policy/anonymous-iframe/resources/common.js"></script>
+<body>
+<script>
+
+const emit_script = (channel_name, message, done_queue_name) => `
+  const bc = new BroadcastChannel("${channel_name}");
+  bc.postMessage("${message}");
+  send("${done_queue_name}", "done");
+`;
+
+promise_test(async t => {
+  const origin = get_host_info().HTTPS_ORIGIN;
+  const not_same_site_origin = get_host_info().HTTPS_NOTSAMESITE_ORIGIN;
+  const response_queue_uuid = token();
+
+  const popup_init_script = `
+    const importScript = ${importScript};
+    await importScript("/html/cross-origin-embedder-policy/credentialless" +
+                       "/resources/common.js");
+    await importScript("/html/cross-origin-embedder-policy/anonymous-iframe" +
+                       "/resources/common.js");
+    await importScript("/common/utils.js");
+    send("${response_queue_uuid}", newIframe("${origin}"));
+  `;
+
+  // Create a same-origin iframe in a cross-site popup.
+  const not_same_site_popup_uuid = newPopup(t, not_same_site_origin);
+  send(not_same_site_popup_uuid, popup_init_script);
+  const iframe_1_uuid = await receive(response_queue_uuid);
+
+  // Create a same-origin iframe in a same-site popup.
+  const same_origin_popup_uuid = newPopup(t, origin);
+  send(same_origin_popup_uuid, popup_init_script);
+  const iframe_2_uuid = await receive(response_queue_uuid);
+
+  const channel_name = token();
+  const bc = new BroadcastChannel(channel_name);
+  bc.onmessage = t.step_func(e => {
+    assert_equals(e.data, "msg from iframe2");
+    t.done();
+  });
+
+  // Instruct the not-same-top-level-site iframe to send a message on the BC
+  // channel we are listening on. This message should not be received since
+  // the iframe should be in a different partition.
+  send(iframe_1_uuid,
+       emit_script(channel_name, "msg from iframe1", response_queue_uuid));
+  assert_equals(await receive(response_queue_uuid), "done");
+
+  // Now instruct the same-top-level-site iframe to send a BC message. By
+  // the time we send the script to execute, have it send the BC message,
+  // and then receive the BC message in our BC instance, it should be
+  // reasonable to assume that the message from the first iframe would have
+  // been delivered if it was going to be.
+  send(iframe_2_uuid,
+       emit_script(channel_name, "msg from iframe2", response_queue_uuid));
+  assert_equals(await receive(response_queue_uuid), "done");
+
+}, "BroadcastChannel messages aren't received from a cross-partition iframe");
+
+</script>
+</body>