Function test_cot_scalar_pi

datafusion/functions/src/math/cot.rs:334–357

()

    #[test]
    fn test_cot_scalar_pi() {
        let arg_fields = vec![Field::new("a", DataType::Float64, false).into()];
        let args = ScalarFunctionArgs {
            args: vec![ColumnarValue::Scalar(ScalarValue::Float64(Some(
                std::f64::consts::PI,
            )))],
            arg_fields,
            number_rows: 1,
            return_field: Field::new("f", DataType::Float64, false).into(),
            config_options: Arc::new(ConfigOptions::default()),
        };
        let result = CotFunc::new()
            .invoke_with_args(args)
            .expect("cot pi should succeed");

        match result {
            ColumnarValue::Scalar(ScalarValue::Float64(Some(v))) => {
                // cot(PI) = 1/tan(PI) - very large negative number due to floating point
                let expected = 1.0_f64 / std::f64::consts::PI.tan();
                assert!((v - expected).abs() < 1e-6);
            }
            _ => panic!("Expected Float64 scalar"),
        }
    }
}