<!DOCTYPE html>
<title>Test that mutation observer doesn't break noassert container size setter.</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="/common/dispatcher/dispatcher.js"></script>
<script src="resources/utils.js"></script>
<body>
<script>
async function checkMutationObserver() {
// Create a FLEDGE FF with a constant content size and given container size.
const requested_width_1 = '299px';
const requested_height_1 = '72px';
const frame = await attachFencedFrameContext({
generator_api: 'fledge', resolve_to_config: true, ad_with_size: true,
requested_size: [requested_width_1, requested_height_1]});
// Install a mutation observer.
const config = { attributes: true, childList: true, subtree: true };
const callback = (mutationList, observer) => {
throw new Error("mutation observed");
}
const observer = new MutationObserver(callback);
observer.observe(frame.element, config);
// Modify the container size manually.
const modified_width = '121px';
const modified_height = '444px';
frame.element.width = modified_width;
frame.element.height = modified_height;
// Navigate to a new FLEDGE FF config with a different container size.
const requested_width_2 = '321px';
const requested_height_2 = '49px';
const replaced_frame = await replaceFrameContext(frame, {
generator_api: 'fledge', resolve_to_config: true, ad_with_size: true,
requested_size: [requested_width_2, requested_height_2]});
observer.disconnect();
}
setup({allow_uncaught_exception: true});
promise_test(async () => { return checkMutationObserver(); }, 'Container size assert no exception ignores mutation observer');
</script>
</body>
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