shared-worker-from-blob-url.window.js

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This WPT test may be referenced by the following Test IDs:
- /workers/shared-worker-from-blob-url.window.html - WPT Dashboard Interop Dashboard

function message_from_port(port) {

  return new Promise(resolve => {

    port.onmessage = e => resolve(e.data);

});

promise_test(async t => {

  const run_result = 'worker_OK_';

  const blob_contents =

    'self.counter = 0; self.onconnect = e => {++self.counter;' +

    'e.source.postMessage("' + run_result + '" + self.counter); };';

  const blob = new Blob([blob_contents]);

  const url = URL.createObjectURL(blob);

  const worker1 = new SharedWorker(url);

  const reply1 = await message_from_port(worker1.port);

  assert_equals(reply1, run_result + '1');

  const worker2 = new SharedWorker(url);

  const reply2 = await message_from_port(worker2.port);

  assert_equals(reply2, run_result + '2');

}, 'Creating a shared worker from a blob URL works.');

promise_test(async t => {

  const run_result = 'worker_OK';

  const blob_contents =

    'self.onconnect = e => { e.source.postMessage("' + run_result + '"); };';

  const blob = new Blob([blob_contents]);

  const url = URL.createObjectURL(blob);

  const worker = new SharedWorker(url);

  URL.revokeObjectURL(url);

  const reply = await message_from_port(worker.port);

  assert_equals(reply, run_result);

}, 'Creating a shared worker from a blob URL works immediately before revoking.');

promise_test(async t => {

  const run_result = 'worker_OK_';

  const blob_contents =

    'self.counter = 0; self.onconnect = e => {++self.counter;' +

    'e.source.postMessage("' + run_result + '" + self.counter); };';

  const blob = new Blob([blob_contents]);

  const url = URL.createObjectURL(blob);

  const worker1 = new SharedWorker(url);

  URL.revokeObjectURL(url);

  const reply1 = await message_from_port(worker1.port);

  assert_equals(reply1, run_result + '1');

  const worker2 = new SharedWorker(url);

  const reply2 = await message_from_port(worker2.port);

  assert_equals(reply2, run_result + '2');

}, 'Connecting to a shared worker on a revoked blob URL works.');