workers/data-url-shared.html

<!DOCTYPE html>
<title>data URL shared worker</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id=log></div>
<script>
function assert_worker_sends_pass(test_desc, mime_type, worker_code) {
  async_test(function(t) {
    var w = new SharedWorker(`data:${mime_type},onconnect = function(e) { port = e.ports[0]; ${worker_code}}`);
    w.port.onmessage = t.step_func_done(function(e) {
      assert_equals(e.data, 'PASS');
    });
    w.port.postMessage('SEND_PASS');
  }, test_desc);
}

function assert_worker_throws(test_desc, worker_code, before_connect_worker_code) {
  assert_worker_sends_pass(test_desc, '', `try { ${worker_code}; port.postMessage("FAIL"); } catch (e) { port.postMessage("PASS"); }`, before_connect_worker_code);
}

// Any MIME type allowed
assert_worker_sends_pass('application/javascript MIME allowed', 'application/javascript', 'port.postMessage("PASS")');
assert_worker_sends_pass('text/plain MIME allowed', 'text/plain', 'port.postMessage("PASS")');
assert_worker_sends_pass('empty MIME allowed', '', 'port.postMessage("PASS")');

// Communications goes both ways
assert_worker_sends_pass('communication goes both ways', 'application/javascript', 'port.onmessage = function(e) { port.postMessage("PASS"); }');

// test access to storage APIs
// once https://github.com/w3c/IndexedDB/pull/150 lands, this is spec conforming
assert_worker_throws('indexedDB inaccessible', 'self.indexedDB.open("someDBName")');
assert_worker_throws('Web SQL Database inaccessible', 'self.openDatabase("someDBName", "1.0", "someDBName", 1);');

// 'data:' workers are cross-origin
assert_worker_sends_pass('cross-origin worker', '', 'fetch("/").then(() => port.postMessage("FAIL"), () => port.postMessage("PASS"))');
// 'data:' workers have opaque origin
assert_worker_sends_pass('worker has opaque origin', 'application/javascript', 'if (self.location.origin == "null") port.postMessage("PASS"); else { port.postMessage("FAIL"); }');
</script>