fix: use stricter assertion for extras key absence

mattheworiordan · claude · ttypic · commit c0807ab704fb · 2026-03-27T12:48:04.000Z
Co-Authored-By: Claude Opus 4.6 &lt;noreply@anthropic.com&gt;
diff --git a/test/unit/mutable_message_test.py b/test/unit/mutable_message_test.py
@@ -131,7 +131,7 @@ def test_message_extras_none_excluded_from_as_dict():
     )
 
     msg_dict = message.as_dict()
-    assert msg_dict.get('extras') is None
+    assert 'extras' not in msg_dict
 
 
 # RSL15b, RTL32b, TM2u

Original file line number	Diff line number	Diff line change
`@@ -131,7 +131,7 @@ def test_message_extras_none_excluded_from_as_dict():`
`131`	`131`	`)`
`132`	`132`
`133`	`133`	`msg_dict = message.as_dict()`
`134`		`- assert msg_dict.get('extras') is None`
	`134`	`+ assert 'extras' not in msg_dict`
`135`	`135`
`136`	`136`
`137`	`137`	`# RSL15b, RTL32b, TM2u`