🧪 [테스트 개선] utcnow 함수에 대한 테스트 추가

backend/tests/test_models.py

@@ -0,0 +1,20 @@
+import datetime as dt
+from unittest import mock
+
+from app.models import utcnow
+
+
+def test_utcnow_returns_utc_datetime():
+    result = utcnow()
+    assert isinstance(result, dt.datetime)
+    assert result.tzinfo is dt.timezone.utc
+
+
+@mock.patch("app.models.dt.datetime")
+def test_utcnow_calls_datetime_now(mock_datetime):
+    # Setup mock behavior so it acts somewhat like standard datetime
+    mock_datetime.now.return_value = dt.datetime(2025, 1, 1, tzinfo=dt.timezone.utc)
+    mock_datetime.timezone = dt.timezone
+
+    utcnow()
+    mock_datetime.now.assert_called_once_with(dt.timezone.utc)