[testlib] stop using internal unittest _addSkip method

I introduced this in changeset e0434df41a2e "[testlib] handle skips in
setUp and tearDown".  Turns out that API changed in python 3.4, so let's
stop using it.

1 files changed, 6 insertions, 1 deletions

diff --git a/testlib.py b/testlib.py
index 22c58bb..f0b8e2f 100644
--- a/testlib.py
+++ b/testlib.py
@@ -531,7 +531,12 @@ class TestCase(unittest.TestCase):
         except (KeyboardInterrupt, SystemExit):
             raise
         except unittest.SkipTest as e:
-            self._addSkip(result, str(e))
+            if hasattr(result, 'addSkip'):
+                result.addSkip(self, str(e))
+            else:
+                warnings.warn("TestResult has no addSkip method, skips not reported",
+                              RuntimeWarning, 2)
+                result.addSuccess(self)
             return False
         except:
             result.addError(self, self.__exc_info())