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<!DOCTYPE html>
<title>DedicatedWorker: parse error failure</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script> setup({allow_uncaught_exception: true}); </script>
<script src="../support/check-error-arguments.js"></script>
<script>
// Check if module scripts are supported on dedicated workers. There is no
// direct way to detect it, so we assume it's supported when static import is
// available on the workers.
//
// This check is necessary to appropriately test parse error handling because
// we need to distinguish the parse error invoked by unsupported "import" in
// the top-level script from the parse error invoked by the statically imported
// script which is the one we want to check in this test.
promise_setup(async () => {
const scriptURL = 'resources/static-import-worker.js';
const worker = new Worker(scriptURL, { type: 'module' });
worker.postMessage('Send message for tests from main script.');
const supportsModuleWorkers = await new Promise((resolve, reject) => {
worker.onmessage = e => {
resolve(e.data.length == 1 && e.data[0] == 'export-on-load-script.js');
};
worker.onerror = () => resolve(false);
});
assert_implements(
supportsModuleWorkers,
"Static import must be supported on module dedicated worker to run this test."
);
});
promise_test(async () => {
const scriptURL = 'resources/syntax-error.js';
const worker = new Worker(scriptURL, { type: 'module' });
const args = await new Promise(resolve =>
worker.onerror = (...args) => resolve(args));
window.checkErrorArguments(args);
}, 'Module worker construction for script with syntax error should dispatch ' +
'an event named error.');
promise_test(async () => {
const scriptURL = 'resources/static-import-syntax-error.js';
const worker = new Worker(scriptURL, { type: 'module' });
const args = await new Promise(resolve =>
worker.onerror = (...args) => resolve(args));
window.checkErrorArguments(args);
}, 'Static import on module worker for script with syntax error should ' +
'dispatch an event named error.');
</script>
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