Add a test to cover searching for a missing node name

tests/test_utils_iterators.py

@@ -175,6 +175,30 @@ class XmliterTestCase(unittest.TestCase):
         node.register_namespace('g', 'http://base.google.com/ns/1.0')
         self.assertEqual(node.xpath('text()').extract(), ['http://www.mydummycompany.com/images/item1.jpg'])
 
+    def test_xmliter_namespaced_nodename_missing(self):
+        body = b"""
+            <?xml version="1.0" encoding="UTF-8"?>
+            <rss version="2.0" xmlns:g="http://base.google.com/ns/1.0">
+                <channel>
+                <title>My Dummy Company</title>
+                <link>http://www.mydummycompany.com</link>
+                <description>This is a dummy company. We do nothing.</description>
+                <item>
+                    <title>Item 1</title>
+                    <description>This is item 1</description>
+                    <link>http://www.mydummycompany.com/items/1</link>
+                    <g:image_link>http://www.mydummycompany.com/images/item1.jpg</g:image_link>
+                    <g:id>ITEM_1</g:id>
+                    <g:price>400</g:price>
+                </item>
+                </channel>
+            </rss>
+        """
+        response = XmlResponse(url='http://mydummycompany.com', body=body)
+        my_iter = self.xmliter(response, 'g:link_image')
+        with self.assertRaises(StopIteration):
+            next(my_iter)
+
     def test_xmliter_exception(self):
         body = (
             '<?xml version="1.0" encoding="UTF-8"?>'