commit 28c179094bcb7829d184fb3cfb3ef626505b9f77
author Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> Thu Apr 05 11:45:33 2018 -0700
committer Raymond Hettinger <rhettinger@users.noreply.github.com> Thu Apr 05 11:45:33 2018 -0700
tree 30df28caa5572691163424dfadcdb463d4659f9b
parent baf304e82e1b54dbeee6b78ddf168e33ed8d557a

bpo-33224: PEP 479 fix for difflib.mdiff() (GH-6381) (GH-6390)

Lib/test/test_difflib.py

diff --git a/Lib/test/test_difflib.py b/Lib/test/test_difflib.py
index aaefe6d..745ccbd 100644
--- a/Lib/test/test_difflib.py
+++ b/Lib/test/test_difflib.py
@@ -93,6 +93,14 @@
         self.assertEqual("+ \t\tI am a bug", diff[2])
         self.assertEqual("? +\n", diff[3])
 
+    def test_mdiff_catch_stop_iteration(self):
+        # Issue #33224
+        self.assertEqual(
+            list(difflib._mdiff(["2"], ["3"], 1)),
+            [((1, '\x00-2\x01'), (1, '\x00+3\x01'), True)],
+        )
+
+
 patch914575_from1 = """
    1. Beautiful is beTTer than ugly.
    2. Explicit is better than implicit.