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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /html/infrastructure/urls/base-url/initial-about-blank-baseURI.window.html - WPT Dashboard Interop Dashboard
// META: script=/common/get-host-info.sub.js
// Test that the initial about:blank gets the about base URL
// from the entry global object.
async function withIframe(src, cb) {
const ifr = document.createElement("iframe");
ifr.src = src;
document.body.append(ifr);
cb(ifr);
ifr.remove();
}
async function withWindow(src, cb) {
const w = window.open(src);
cb(w);
w.close();
}
// Need a trailing '/' for equality checks
const REMOTE_ORIGIN = new URL("/", get_host_info().REMOTE_ORIGIN).href;
async function withWindowOpenerNotInitiator(src, cb) {
window.deferredIframeWindow = Promise.withResolvers();
// Create an iframe with a different base URL.
// If it opens a window with window.top being the opener,
// the base URL should come from the initiator, i.e. this iframe.
const ifr = document.createElement("iframe");
ifr.srcdoc = `
<head>
<base href='${REMOTE_ORIGIN}'>
<script>
const w = window.top.open('${src}');
window.top.deferredIframeWindow.resolve(w);
</scr` + `ipt>
</head>
<body></body>
`;
document.body.append(ifr);
const w = await window.deferredIframeWindow.promise;
cb(w);
w.close();
ifr.remove();
}
promise_test(async t => {
await withIframe("", ifr => {
assert_equals(ifr.contentDocument.baseURI, document.baseURI, "about:blank has creator's base URI");
})
}, "Initial iframe about:blank gets base url from creator");
promise_test(async t => {
await withIframe("/arbitrary-sameorigin-src", ifr => {
assert_equals(ifr.contentDocument.baseURI, document.baseURI, "about:blank has creator's base URI");
})
}, "Transient iframe about:blank gets base url from creator");
promise_test(async t => {
await withWindow("", w => {
assert_equals(w.document.baseURI, document.baseURI, "about:blank has creator's base URI");
})
}, "Initial top-level about:blank gets base url from creator = opener");
promise_test(async t => {
await withWindow("/arbitrary-sameorigin-src", w => {
assert_equals(w.document.baseURI, document.baseURI, "about:blank has creator's base URI");
})
}, "Transient top-level about:blank gets base url from creator = opener");
promise_test(async t => {
await withWindowOpenerNotInitiator("", w => {
assert_not_equals(REMOTE_ORIGIN, document.baseURI, "These need to be different");
assert_equals(w.document.baseURI, REMOTE_ORIGIN, "about:blank has creator's base URI");
})
}, "Initial top-level about:blank gets base url from creator != opener");
promise_test(async t => {
await withWindowOpenerNotInitiator("/arbitrary-sameorigin-src", w => {
assert_not_equals(REMOTE_ORIGIN, document.baseURI, "These need to be different");
assert_equals(w.document.baseURI, REMOTE_ORIGIN, "about:blank has creator's base URI");
})
}, "Transient top-level about:blank gets base url from creator != opener");