kevinjqliu commented on code in PR #3521:
URL: https://github.com/apache/iceberg-python/pull/3521#discussion_r3449737998


##########
tests/expressions/test_evaluator.py:
##########
@@ -1523,12 +1523,48 @@ def test_strict_integer_not_in(strict_data_file_schema: 
Schema, strict_data_file
     assert should_read, "Should match: notIn on all nulls column"
 
     should_read = _StrictMetricsEvaluator(strict_data_file_schema, 
NotIn("some_nulls", {"abc", "def"})).eval(strict_data_file_1)
-    assert should_read, "Should match: notIn on some nulls column, 'bbb' > 
'abc' and 'bbb' < 'def'"
+    assert not should_read, "Should not match: some non-null value may be == 
'def' which is within bounds ['bbb', 'eee']"

Review Comment:
   ```suggestion
       assert not should_read, "Should not match: mixed-null notIn cannot be 
proven when bounds are missing"
   ```



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