Make singleNodeValue nullable to match DOM spec

soosungp33 · chromium-wpt-export-bot · commit 6f197498db77 · 2025-11-08T06:20:41.000-08:00
This patch updates the singleNodeValue attribute from non-nullable to nullable to match the DOM specification. Since null was already returned regardless of the IDL change, this patch is not an actual behavior change. Bug: 456874035 Change-Id: Ib6b69c8c991a6a21d531242c87bcdf4e51bc40ef Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7109180 Reviewed-by: Joey Arhar <jarhar@chromium.org> Commit-Queue: YeongHan Kim <soosungp33@gmail.com> Reviewed-by: Jinho Bang <zino@chromium.org> Cr-Commit-Position: refs/heads/main@{#1542186}
diff --git a/dom/xpath-result-single-node-value-nullable.html b/dom/xpath-result-single-node-value-nullable.html
@@ -0,0 +1,34 @@
+<!DOCTYPE html>
+<meta charset="UTF-8">
+<title>XPathResult singleNodeValue should be nullable</title>
+<link rel=help href="https://dom.spec.whatwg.org/#dom-xpathresult-singlenodevalue">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<body>
+<div id="div">
+  <span id="exist"></span>
+</div>
+<script>
+test(() => {
+  const div = document.getElementById('div');
+
+  const isNull = document.evaluate(
+    '//non-span',
+    div,
+    null,
+    XPathResult.FIRST_ORDERED_NODE_TYPE,
+    null
+  );
+  assert_equals(isNull.singleNodeValue, null);
+
+  const isNotNull = document.evaluate(
+    '//span',
+    div,
+    null,
+    XPathResult.FIRST_ORDERED_NODE_TYPE,
+    null
+  );
+  assert_not_equals(isNotNull.singleNodeValue, null);
+}, 'singleNodeValue should be nullable');
+</script>
+</body>
