| <!doctype html> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script> |
| // 1. Exception is thrown somewhere in a Worker. |
| // Various contexts are tested: from worker initialization, |
| // from setTimeout, from event handlers, etc. |
| // 2. WorkerGlobalScope.onerror event handler is called. |
| // (i.e. `onerror` in the worker script) |
| // 3. From the event handler, another exception is thrown. |
| // 4. Each of Worker.onerror handler (on the parent Document) and |
| // Worker error event listener should be called twice: |
| // once for each of the exceptions thrown in Step 1 and 2, respectively. |
| // (We don't check the ordering of two Worker.onerror calls, because |
| // browsers fires them in different orders) |
| |
| function prepareHandler(t, messages) { |
| const fired = {}; |
| let fired_count = 0; |
| t.step_timeout(() => { |
| if (fired_count < messages.length) { |
| let error_description = 'Worker.onerror not fired for:'; |
| for (const message of messages) { |
| if (!fired[message]) { |
| error_description += ' '; |
| error_description += message; |
| } |
| } |
| assert_unreached(error_description); |
| } |
| }, 2000); |
| return t.step_func(e => { |
| e.preventDefault(); |
| for (const message of messages) { |
| if (!fired[message] && e.message.indexOf(message) >= 0) { |
| fired[message] = true; |
| ++fired_count; |
| if (fired_count === messages.length) { |
| // Worker.onerror is fired for all messages. |
| t.done(); |
| } |
| return; |
| } |
| } |
| assert_unreached("Unexpected worker.onerror message: " + e.message); |
| }); |
| } |
| |
| function expectErrors(worker, title, messages) { |
| async_test(t => { |
| worker.addEventListener('error', prepareHandler(t, messages)); |
| }, title+ ': listener'); |
| async_test(t => { |
| worker.onerror = prepareHandler(t, messages); |
| }, title + ': handler'); |
| } |
| |
| for (const type of ['classic', 'module']) { |
| const workerOptions = type === 'module' ? {type: 'module'}: {}; |
| |
| const worker1 = new Worker( |
| 'throw.js?throw-in-toplevel&throw-in-onerror', |
| workerOptions); |
| expectErrors( |
| worker1, |
| 'Throw in worker initialization: ' + type, |
| ['Throw in toplevel', 'Throw in error handler']); |
| |
| const worker2 = new Worker( |
| 'throw.js?throw-in-setTimeout-function&throw-in-onerror', workerOptions); |
| expectErrors( |
| worker2, |
| 'Throw in setTimeout(function): ' + type, |
| ['Throw in setTimeout function', 'Throw in error handler']); |
| |
| const worker3 = new Worker( |
| 'throw.js?throw-in-setTimeout-string&throw-in-onerror', workerOptions); |
| expectErrors( |
| worker3, |
| 'Throw in setTimeout(string): ' + type, |
| ['Throw in setTimeout string', 'Throw in error handler']); |
| |
| const worker4 = new Worker('throw.js?throw-in-onerror', workerOptions); |
| worker4.postMessage('foo'); |
| expectErrors( |
| worker4, |
| 'Throw in message handler: ' + type, |
| ['Throw in message handler', 'Throw in error handler']); |
| |
| } |
| </script> |
