add tests for mark extraction and fix rep of markdecorator

_pytest/mark.py

@@ -264,6 +264,7 @@ def istestfunc(func):
     return hasattr(func, "__call__") and \
         getattr(func, "__name__", "<lambda>") != "<lambda>"
 
+
 class MarkDecorator(object):
     """ A decorator for test functions and test classes.  When applied
     it will create :class:`MarkInfo` objects which may be
@@ -309,8 +310,11 @@ def __init__(self, mark):
     def markname(self):
         return self.name # for backward-compat (2.4.1 had this attr)
 
+    def __eq__(self, other):
+        return self.mark == other.mark
+
     def __repr__(self):
-        return "<MarkDecorator %r>" % self.mark
+        return "<MarkDecorator %r>" % (self.mark,)
 
     def __call__(self, *args, **kwargs):
         """ if passed a single callable argument: decorate it with mark info.

testing/test_mark.py

@@ -3,7 +3,7 @@
 import sys
 
 import pytest
-from _pytest.mark import MarkGenerator as Mark
+from _pytest.mark import MarkGenerator as Mark, ParameterSet
 
 class TestMark(object):
     def test_markinfo_repr(self):
@@ -742,3 +742,16 @@ def assert_test_is_not_selected(keyword):
 
         assert_test_is_not_selected("__")
         assert_test_is_not_selected("()")
+
+
+@pytest.mark.parametrize('argval, expected', [
+    (pytest.mark.skip()((1, 2)),
+     ParameterSet(values=(1, 2), marks=[pytest.mark.skip], id=None)),
+    (pytest.mark.xfail(pytest.mark.skip()((1, 2))),
+     ParameterSet(values=(1, 2),
+                  marks=[pytest.mark.xfail, pytest.mark.skip], id=None)),
+
+])
+def test_parameterset_extractfrom(argval, expected):
+    extracted = ParameterSet.extract_from(argval)
+    assert extracted == expected