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// META: script=/common/utils.js
// .stack properties on errors are unspecified, but are present in most
// browsers, most of the time. https://github.com/tc39/proposal-error-stacks/ tracks standardizing them.
// Tests will pass automatically if the .stack property isn't present.
stackTests(() => {
return new Error('some message');
}, 'page-created Error');
stackTests(() => {
return new DOMException('InvalidStateError', 'some message');
}, 'page-created DOMException');
stackTests(() => {
try {
Object.defineProperty();
} catch (e) {
return e;
}
}, 'JS-engine-created TypeError');
stackTests(() => {
try {
HTMLParagraphElement.prototype.align;
} catch (e) {
return e;
}
}, 'web API-created TypeError');
stackTests(() => {
try {
document.createElement('');
} catch (e) {
return e;
}
}, 'web API-created DOMException');
function stackTests(errorFactory, description) {
test(t => {
const error = errorFactory();
const originalStack = error.stack;
if (!originalStack) {
return;
}
const clonedError = structuredClone(error);
assert_equals(clonedError.stack, originalStack);
}, description + ' (structuredClone())');
async_test(t => {
const error = errorFactory();
const originalStack = error.stack;
if (!originalStack) {
t.done();
return;
}
const worker = new Worker('resources/echo-worker.js');
worker.onmessage = t.step_func_done(e => {
assert_equals(e.data.stack, originalStack);
});
worker.postMessage(error);
}, description + ' (worker)');
let iframeTest = (t, url) => {
const thisTestId = token();
const error = errorFactory();
const originalStack = error.stack;
if (!originalStack) {
t.done();
return;
}
const iframe = document.createElement('iframe');
window.addEventListener('message', t.step_func(e => {
if (e.data.testId === thisTestId) {
assert_equals(e.data.error.stack, originalStack);
t.done();
}
}));
iframe.onload = t.step_func(() => {
iframe.contentWindow.postMessage({ error, testId: thisTestId }, "*");
});
iframe.src = url;
document.body.append(iframe);
}
async_test(t => {
const crossSiteURL = new URL('resources/echo-iframe.html', location.href);
crossSiteURL.hostname = '{{hosts[alt][www1]}}';
iframeTest(t, crossSiteURL);
}, description + ' (cross-site iframe)');
async_test(t => {
const sameOriginURL = new URL('resources/echo-iframe.html', location.href);
iframeTest(t, sameOriginURL);
}, description + ' (same-origin iframe)')
}
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