FIX ensure backward compatibility

NelleV · NelleV · commit d828f534affe · 2017-01-27T13:03:19.000-08:00
diff --git a/lib/matplotlib/testing/__init__.py b/lib/matplotlib/testing/__init__.py
@@ -8,6 +8,8 @@
 import matplotlib
 from matplotlib.cbook import is_string_like, iterable
 from matplotlib import rcParams, rcdefaults, use
+# For backward compatibility
+from . import noseclasses
 
 
 def _is_list_like(obj):
diff --git a/lib/matplotlib/testing/noseclasses.py b/lib/matplotlib/testing/noseclasses.py
@@ -0,0 +1,27 @@
+"""
+The module testing.noseclasses is deprecated as of 2.1
+"""
+
+from __future__ import (absolute_import, division, print_function,
+                        unicode_literals)
+try:
+    from ._nose.plugins.knownfailure import KnownFailure as _KnownFailure
+    has_nose = True
+except ImportError:
+    has_nose = False
+    _KnownFailure = object
+
+from .. import cbook
+
+cbook.warn_deprecated(
+    since="2.1",
+    message="The noseclass module has been deprecated in 2.1 and will "
+            "be removed in matplotlib 2.3.")
+
+
+@cbook.deprecated("2.1")
+class KnownFailure(_KnownFailure):
+    def __init__(self):
+        if not has_nose:
+            raise ImportError("Need nose for this plugin.")
+    pass
