remove unecessary mutation test

Author: cameledev

src/summary/tests/unit/test_user_assign.py

@@ -1,7 +1,5 @@
 """Tests for the speaker-to-user assignment service."""
 
-import copy
-
 from summary.core.user_assign import (
     AssignmentResult,
     Interval,
@@ -457,32 +455,6 @@ def test_unassigned_speakers_unchanged(self):
         result = assignment.apply(diarization)
         assert result["segments"][0]["speaker"] == "SPEAKER_02"
 
-    def test_does_not_mutate_original(self):
-        """The original diarization dict is not modified."""
-        diarization = {
-            "segments": [
-                {
-                    "start": 1.0,
-                    "end": 3.0,
-                    "speaker": "SPEAKER_00",
-                    "words": [
-                        {"word": "Hi", "speaker": "SPEAKER_00"},
-                    ],
-                },
-            ],
-            "word_segments": [
-                {"word": "Hi", "speaker": "SPEAKER_00"},
-            ],
-        }
-        original = copy.deepcopy(diarization)
-        assignment = AssignmentResult(
-            assignments=[
-                SpeakerAssignment("SPEAKER_00", "id-a", "Alice", 0.9),
-            ],
-        )
-        assignment.apply(diarization)
-        assert diarization == original
-
     def test_preserves_extra_keys(self):
         """Non-segment keys in diarization are preserved."""
         diarization = {