holger krekel 1677d28 issue250 unicode/str mixes in parametrization names and values now works; Wed Feb 13
diff -ur pytest-2.3.4.orig/_pytest/python.py pytest-2.3.4/_pytest/python.py
--- _pytest/python.py	2012-11-20 14:07:28.000000000 +0800
+++ _pytest/python.py	2013-02-14 09:55:16.369853793 +0800
@@ -730,7 +730,7 @@
         this_id = []
         for nameindex, val in enumerate(valset):
             if not isinstance(val, (float, int, str)):
-                this_id.append(argnames[nameindex]+str(valindex))
+                this_id.append(str(argnames[nameindex])+str(valindex))
             else:
                 this_id.append(str(val))
         idlist.append("-".join(this_id))
diff -ur pytest-2.3.4.orig/testing/python/metafunc.py pytest-2.3.4/testing/python/metafunc.py
--- testing/python/metafunc.py	2012-11-20 14:07:28.000000000 +0800
+++ testing/python/metafunc.py	2013-02-14 10:01:43.442834535 +0800
@@ -106,6 +106,7 @@
         assert metafunc._calls[2].id == "x1-a"
         assert metafunc._calls[3].id == "x1-b"
 
+    @pytest.mark.issue250
     def test_idmaker_autoname(self):
         from _pytest.python import idmaker
         result = idmaker(("a", "b"), [("string", 1.0),
@@ -115,6 +116,9 @@
         result = idmaker(("a", "b"), [(object(), 1.0),
                                       (object(), object())])
         assert result == ["a0-1.0", "a1-b1"]
+        # unicode mixing, issue250
+        result = idmaker((py.builtin._totext("a"), "b"), [({}, '\xc3\xb4')])
+        assert result == ['a0-\xc3\xb4']
 
 
     def test_addcall_and_parametrize(self):