Do not asssume Item.obj in 'skipping' plugin

AUTHORS

@@ -141,5 +141,6 @@ Trevor Bekolay
 Tyler Goodlet
 Vasily Kuznetsov
 Victor Uriarte
+Vidar T. Fauske
 Wouter van Ackooy
 Xuecong Liao

CHANGELOG.rst

@@ -6,7 +6,8 @@
 * Replace ``raise StopIteration`` usages in the code by simple ``returns`` to finish generators, in accordance to `PEP-479`_ (`#2160`_).
   Thanks `@tgoodlet`_ for the report and `@nicoddemus`_ for the PR.
 
-*
+* Skipping plugin now also works with test items generated by custom collectors (`#2231`_).
+  Thanks to `@vidartf`_.
 
 *
 
@@ -16,6 +17,10 @@
 
 .. _PEP-479: https://www.python.org/dev/peps/pep-0479/
 
+.. _#2231: https://github.com/pytest-dev/pytest/issues/2231
+
+.. _@vidartf: https://github.com/vidartf
+
 
 3.0.6 (2017-01-22)
 ==================

_pytest/skipping.py

@@ -112,7 +112,8 @@ def istrue(self):
 
     def _getglobals(self):
         d = {'os': os, 'sys': sys, 'config': self.item.config}
-        d.update(self.item.obj.__globals__)
+        if hasattr(self.item, 'obj'):
+            d.update(self.item.obj.__globals__)
         return d
 
     def _istrue(self):

testing/test_skipping.py

@@ -969,3 +969,26 @@ def test_func():
     result.stdout.fnmatch_lines(
         "*Using pytest.skip outside of a test is not allowed*"
     )
+
+
+def test_mark_xfail_item(testdir):
+    # Ensure pytest.mark.xfail works with non-Python Item
+    testdir.makeconftest("""
+        import pytest
+
+        class MyItem(pytest.Item):
+            nodeid = 'foo'
+            def setup(self):
+                marker = pytest.mark.xfail(True, reason="Expected failure")
+                self.add_marker(marker)
+            def runtest(self):
+                assert False
+
+        def pytest_collect_file(path, parent):
+            return MyItem("foo", parent)
+    """)
+    result = testdir.inline_run()
+    passed, skipped, failed = result.listoutcomes()
+    assert not failed
+    xfailed = [r for r in skipped if hasattr(r, 'wasxfail')]
+    assert xfailed