Clean up after add_field in test

sampsyo · sampsyo · commit 825ca0ef6f85 · 2020-06-30T07:32:12.000-04:00
Should fix #33.
diff --git a/test/test_mediafile_edge.py b/test/test_mediafile_edge.py
@@ -442,6 +442,10 @@ def test_write(self):
 
     def tearDown(self):
         self.remove_temp_dir()
+        try:
+            del mediafile.MediaFile.read_only_test
+        except AttributeError:
+            pass
 
 
 def suite():
