| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>Tree order of node sets during evaluation</title> |
| <link rel="author" title="Simon Wülker" href="mailto:simon.wuelker@arcor.de"> |
| <link rel="help" href="https://github.com/servo/servo/issues/40435"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| </head> |
| <body> |
| <div id="container"> |
| <span></span> |
| <p id="p"></p> |
| </div> |
| <script> |
| function toArray(result) { |
| var a = []; |
| while (true) { |
| var node = result.iterateNext(); |
| if (node === null) break; |
| a.push(node); |
| } |
| return a; |
| } |
| |
| let container = document.getElementById("container"); |
| test(() => { |
| // If the result of "(./p | ./span)" is not in tree order then "last()" will filter the wrong element, |
| // causing the span to be returned. |
| |
| let result = document.evaluate("(./p | ./span)[last()]", container, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE, null); |
| assert_array_equals(toArray(result), [document.getElementById("p")]) |
| }, "Temporary node sets created during evaluation must be in tree order"); |
| </script> |
| </body> |
| </html> |
