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[domxpath] Test root-adjacent nodes #61311

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[domxpath] Test root-adjacent nodes #61311

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38 changes: 37 additions & 1 deletion domxpath/document.tentative.html
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
<!doctype html>
<title>XPath parent of documentElement</title>
<title>XPath parent axis for document children</title>
<script src='/resources/testharness.js'></script>
<script src='/resources/testharnessreport.js'></script>
<body>
Expand Down Expand Up @@ -28,4 +28,40 @@
}
assert_array_equals(matched, [document]);
});

function assert_parent_axis_matches_document(node) {
const result = document.evaluate("..",
node,
null,
XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,
null);
assert_equals(result.snapshotLength, 1);
assert_equals(result.snapshotItem(0), document);
}

test(function(t) {
const comment = document.createComment("root-adjacent comment");
document.insertBefore(comment, document.documentElement);
t.add_cleanup(() => comment.remove());

assert_parent_axis_matches_document(comment);
}, "The parent axis of a root-adjacent comment is the document");

test(function(t) {
const instruction = document.createProcessingInstruction("target", "data");
document.insertBefore(instruction, document.documentElement);
t.add_cleanup(() => instruction.remove());

assert_parent_axis_matches_document(instruction);
}, "The parent axis of a root-adjacent processing instruction is the document");

test(function() {
assert_throws_dom("NotSupportedError", () => {
document.evaluate("..",
document.doctype,
null,
XPathResult.ANY_TYPE,
null);
});
}, "A document type cannot be used as an XPath context node");
</script>
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