TST: if no converter is found, skip the test

jankatins · matthew-brett · commit f6b96e5c1a99 · 2016-08-24T20:37:09.000-07:00
diff --git a/lib/matplotlib/testing/compare.py b/lib/matplotlib/testing/compare.py
@@ -174,8 +174,8 @@ def convert(filename, cache):
     """
     base, extension = filename.rsplit('.', 1)
     if extension not in converter:
-        raise ImageComparisonFailure(
-            "Don't know how to convert %s files to png" % extension)
+        from nose import SkipTest
+        raise SkipTest("Don't know how to convert %s files to png" % extension)
     newname = base + '_' + extension + '.png'
     if not os.path.exists(filename):
         raise IOError("'%s' does not exist" % filename)
