From 47c0fc3d78a6db8bbe6c298dec76084142f59171 Mon Sep 17 00:00:00 2001
From: Reagan Lee <96998476+reaganjlee@users.noreply.github.com>
Date: Thu, 10 Aug 2023 16:36:22 -0700
Subject: [PATCH] tests

---
 testing/test_assertrewrite.py | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/testing/test_assertrewrite.py b/testing/test_assertrewrite.py
index e1b71ded6..d85c8bed6 100644
--- a/testing/test_assertrewrite.py
+++ b/testing/test_assertrewrite.py
@@ -685,6 +685,21 @@ class TestAssertionRewrite:
         assert msg is not None
         assert "<MY42 object> < 0" in msg
 
+    def test_assert_handling_raise_in__iter__(self) -> None:
+        def f() -> None:
+            class A:
+                def __iter__(self):
+                    raise TypeError("user message")
+
+                def __eq__(self, o: object) -> bool:
+                    return self is o
+
+            assert A() == A()
+
+        msg = getmsg(f)
+        assert msg is not None
+        assert "Unexpected exception" in msg
+
     def test_formatchar(self) -> None:
         def f() -> None:
             assert "%test" == "test"  # type: ignore[comparison-overlap]