Fix regression defusedxml.ElementTree.ParseError

The ``defusedxml.ElementTree.ParseError`` exception is now the same class object
as ``xml.etree.ElementTree.ParseError`` again. The regression was
introduced by new patching code as part of PR #60.

See: https://github.com/tiran/defusedxml/pull/60
Fixes: https://github.com/tiran/defusedxml/issues/63
Signed-off-by: Christian Heimes <christian@python.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/tests.py b/tests.py
index ccdf49b..ab52aab 100644
--- a/tests.py
+++ b/tests.py
@@ -218,6 +218,15 @@ class TestDefusedElementTree(BaseTests):
 
         self.assertIs(orig_elementtree, second_elementtree)
 
+    def test_orig_parseerror(self):
+        # https://github.com/tiran/defusedxml/issues/63
+        self.assertIs(self.module.ParseError, orig_elementtree.ParseError)
+        try:
+            self.parseString("invalid")
+        except Exception as e:
+            self.assertIsInstance(e, orig_elementtree.ParseError)
+            self.assertIsInstance(e, self.module.ParseError)
+
 
 class TestDefusedcElementTree(TestDefusedElementTree):
     module = cElementTree