| <!DOCTYPE html> |
| <meta charset="utf-8"> |
| <title>Event handlers processing algorithm: error events</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <link rel="help" href="https://html.spec.whatwg.org/multipage/#the-event-handler-processing-algorithm"> |
| <link rel="author" title="Domenic Denicola" href="mailto:d@domenic.me"> |
| |
| <div id="log"></div> |
| |
| <script> |
| "use strict"; |
| setup({ allow_uncaught_exception: true }); |
| |
| promise_test(t => { |
| window.onerror = t.step_func((...args) => { |
| assert_greater_than(args.length, 1); |
| return true; |
| }); |
| |
| const eventWatcher = new EventWatcher(t, window, "error"); |
| const promise = eventWatcher.wait_for("error").then(e => { |
| assert_equals(e.defaultPrevented, true); |
| }); |
| |
| setTimeout(() => thisFunctionDoesNotExist(), 0); |
| |
| return promise; |
| }, "error event is weird (return true cancels; many args) on Window, with a runtime error"); |
| |
| promise_test(t => { |
| window.onerror = t.step_func(function (message, filename, lineno, colno, error) { |
| assert_equals(arguments.length, 5, "There must be exactly 5 arguments"); |
| assert_equals(typeof message, "string", "message argument must be a string"); |
| assert_equals(typeof filename, "string", "filename argument must be a string"); |
| assert_equals(typeof lineno, "number", "lineno argument must be a number"); |
| assert_equals(typeof colno, "number", "colno argument must be a number"); |
| assert_equals(typeof error, "object", "error argument must be an object"); |
| assert_equals(error.constructor, ReferenceError, "error argument must be a ReferenceError"); |
| return true; |
| }); |
| |
| setTimeout(() => thisFunctionDoesNotExist(), 0); |
| |
| const eventWatcher = new EventWatcher(t, window, "error"); |
| return eventWatcher.wait_for("error"); |
| }, "error event has the right 5 args on Window, with a runtime error"); |
| </script> |
