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Test Info: Warnings

// Verify that an iframe whose URL "matches about:blank" [1] uses its about base
// URL and initiator/creator origin.
//
onload = () => {
async_test(t => {
const iframe = document.createElement('iframe');
// Navigate the iframe away from the initial about:blank Document [1] to
// isolate the effects of a "matches about:blank" URL.
//
iframe.src = '/common/blank.html';
iframe.addEventListener('load', e => {
assert_equals(iframe.contentWindow.location.pathname, '/common/blank.html');
// Navigate the iframe to a URL that "matches about:blank" but isn't exactly
// "about:blank".
iframe.onload = t.step_func_done(() => {
assert_equals(iframe.contentDocument.URL, 'about:blank?query#fragment');
assert_equals(iframe.contentWindow.origin, window.origin);
assert_equals(iframe.contentDocument.baseURI, document.baseURI);
});
iframe.src = 'about:blank?query#fragment';
}, {once: true});
document.body.appendChild(iframe);
}, "about:blank and about:blank?foo#bar both 'match about:blank'");
};