Mark the new test as xfail for xmliter_lxml

tests/test_utils_iterators.py

@@ -1,5 +1,6 @@
 import os
 
+from pytest import mark
 from twisted.trial import unittest
 
 from scrapy.utils.iterators import csviter, xmliter, _body_or_str, xmliter_lxml
@@ -149,6 +150,26 @@ class XmliterTestCase(unittest.TestCase):
         self.assertEqual(node.xpath('id/text()').getall(), [])
         self.assertEqual(node.xpath('price/text()').getall(), [])
 
+    def test_xmliter_namespaced_nodename(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:image_link')
         node = next(my_iter)
         node.register_namespace('g', 'http://base.google.com/ns/1.0')
@@ -187,6 +208,10 @@ class XmliterTestCase(unittest.TestCase):
 class LxmlXmliterTestCase(XmliterTestCase):
     xmliter = staticmethod(xmliter_lxml)
 
+    @mark.xfail(reason='known bug of the current implementation')
+    def test_xmliter_namespaced_nodename(self):
+        super().test_xmliter_namespaced_nodename()
+
     def test_xmliter_iterate_namespace(self):
         body = b"""
             <?xml version="1.0" encoding="UTF-8"?>