File: responsive-iframe-request-resize-error.tentative.html

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<!doctype HTML>
<title>Test that calling `window.requestResize()` throws DOM NotAllowedError.</title>
<link rel="author" href="mailto:kojii@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-sizing/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script>
test(t => {
  assert_throws_dom('NotAllowedError', () => window.requestResize());
}, "`window.requestResize()` from the parent frame throws DOM NotAllowedError");

async_test(t => {
  window.addEventListener('message', t.step_func_done(e => {
    assert_equals(e.data.name, 'NotAllowedError');
  }, {once: true}));
  const iframe = document.createElement('iframe');
  iframe.src = 'resources/iframe-contents-request-resize-error.html';
  document.body.appendChild(iframe);
}, "`window.requestResize()` from iframe without `responsive-embedded-sizing` meta tag throws DOM NotAllowedError");
</script>
</body>