1 files changed, 33 insertions, 0 deletions
diff --git a/testing/web-platform/tests/dom/ranges/Range-commonAncestorContainer-2.html b/testing/web-platform/tests/dom/ranges/Range-commonAncestorContainer-2.html
new file mode 100644
index 0000000000..f0a3e451cd
--- /dev/null
+++ b/testing/web-platform/tests/dom/ranges/Range-commonAncestorContainer-2.html
@@ -0,0 +1,33 @@
+<!doctype html>
+<title>Range.commonAncestorContainer</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<div id=log></div>
+<script>
+test(function() {
+  var range = document.createRange();
+  range.detach();
+  assert_equals(range.commonAncestorContainer, document);
+}, "Detached Range")
+test(function() {
+  var df = document.createDocumentFragment();
+  var foo = df.appendChild(document.createElement("foo"));
+  foo.appendChild(document.createTextNode("Foo"));
+  var bar = df.appendChild(document.createElement("bar"));
+  bar.appendChild(document.createComment("Bar"));
+  [
+    // start node, start offset, end node, end offset, expected cAC
+    [foo, 0, bar, 0, df],
+    [foo, 0, foo.firstChild, 3, foo],
+    [foo.firstChild, 0, bar, 0, df],
+    [foo.firstChild, 3, bar.firstChild, 2, df]
+  ].forEach(function(t) {
+    test(function() {
+      var range = document.createRange();
+      range.setStart(t[0], t[1]);
+      range.setEnd(t[2], t[3]);
+      assert_equals(range.commonAncestorContainer, t[4]);
+    })
+  });
+}, "Normal Ranges")
+</script>