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<!DOCTYPE html>
<meta charset="utf-8">
<title>Selecting internal node</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<link rel="stylesheet" href="/fonts/ahem.css">
<style>
details {
font: 16px/1 Ahem;
}
</style>
<details id="details"></details>
<script>
promise_test(async () => {
await new test_driver.Actions()
.pointerMove(5, 5, {origin: details})
.pointerDown()
.pointerMove(50, 50)
.pointerUp()
.send();
const selection = getSelection();
if (selection.anchorNode === null) {
// <details> is not selectable, which is acceptable
return;
}
// Gecko throws when accessing any property from DOM-invisible node
// so check we can access something
assert_equals(selection.anchorNode.constructor.name, "HTMLDetailsElement");
assert_equals(selection.anchorOffset, 0);
// Gecko limits the selection inside <details> while Blink does not
// so check something general
assert_equals(selection.focusNode.nodeType, Node.ELEMENT_NODE);
assert_equals(selection.focusOffset, 0);
}, "Selecting the default summary of <details> should report a DOM-visible ancestor");
</script>
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