BUG: Refactor test_dti_cmp_tdi_tzawareness function to reduce redundancy pandas/tests/arithmetic/test_datetime64.py

[himanshurd]

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Reproducible Example

def test_dti_cmp_tdi_tzawareness(self, other):
    # GH#22074
    # Reversion test that ensures we do not call _assert_tzawareness_compat
    # when comparing a DatetimeIndex against a TimedeltaIndex

    # Create a DatetimeIndex with a timezone 'Asia/Tokyo', spanning 10 periods
    dti = date_range("2000-01-01", periods=10, tz="Asia/Tokyo")

    # Comparison operations and expected results
    comparison_tests = {
        '==': np.array([False] * 10),
        '!=': np.array([True] * 10)
    }

    # Loop through each comparison operation and expected result
    for op, expected in comparison_tests.items():
        # Perform the comparison dynamically
        result = eval(f'dti {op} other')
        # Assert that the result matches the expected array
        tm.assert_numpy_array_equal(result, expected)

    # Define the error message expected for invalid comparisons
    msg = "Invalid comparison between"
    # List of comparison operators that should raise a TypeError
    invalid_comparisons = ['<', '<=', '>', '>=']

    # Loop through invalid comparisons to assert TypeError is raised
    for op in invalid_comparisons:
        with pytest.raises(TypeError, match=msg):
            eval(f'dti {op} other')

Issue Description

The function had repeated sections for testing equality (== and !=) and invalid comparisons (<, <=, >, >=), which resulted in a lot of duplicated code.

Expected Behavior

The behavior will remain same

Installed Versions

Replace this line with the output of pd.show_versions()

[himanshurd]

Created Pull request: #58942

[mroeschke]

As mentioned in #58942, I think this testing function is good as-is so closing