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<!DOCTYPE html>
<title>Element#requestFullscreen() on two elements in different iframes</title>
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../trusted-click.js"></script>
<div id="log"></div>
<iframe id="a" allowfullscreen></iframe>
<iframe id="b" allowfullscreen></iframe>
<script>
async_test(t => {
// Request fullscreen on the body elements of both iframes, but in reverse
// tree order.
const a = document.getElementById('a');
const b = document.getElementById('b');
// Expect two fullscreenchange events, with document.fullscreenElement
// changing in the same order as the requests. (Events should also fire on the
// iframes' documents, but this is not covered by this test.)
const order = [];
document.onfullscreenchange = t.step_func(() => {
assert_in_array(document.fullscreenElement, [a, b]);
order.push(document.fullscreenElement.id);
if (order.length == 2) {
// When the second event arrived, the fullscreen element may still be the
// old one.
//
// TODO(mustaq): We need a better explanation here to cover the tree-order
// idea of the spec.
assert_true(order[0] == 'a' || order[0] == 'b', 'first id seen is a or b');
assert_true(order[1] == 'a', 'second id seen is a');
t.done();
}
});
document.onfullscreenerror = t.unreached_func('fullscreenerror event');
// Make a trusted click on frame 'b' to activate it.
trusted_click(t, () => {
// Now queue a trusted click on frame 'a' to make back-to-back calls.
setTimeout(() => {
trusted_click(t, () => {
b.contentDocument.body.requestFullscreen();
a.contentDocument.body.requestFullscreen();
}, a.contentDocument.body);
}, 0);
}, b.contentDocument.body);
});
</script>
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