Function test_log_f32

datafusion/functions/src/math/log.rs:709–747

()

    #[test]
    fn test_log_f32() {
        let arg_fields = vec![
            Field::new("a", DataType::Float32, false).into(),
            Field::new("a", DataType::Float32, false).into(),
        ];
        let args = ScalarFunctionArgs {
            args: vec![
                ColumnarValue::Array(Arc::new(Float32Array::from(vec![
                    2.0, 2.0, 3.0, 5.0,
                ]))), // base
                ColumnarValue::Array(Arc::new(Float32Array::from(vec![
                    8.0, 4.0, 81.0, 625.0,
                ]))), // num
            ],
            arg_fields,
            number_rows: 4,
            return_field: Field::new("f", DataType::Float32, true).into(),
            config_options: Arc::new(ConfigOptions::default()),
        };
        let result = LogFunc::new()
            .invoke_with_args(args)
            .expect("failed to initialize function log");

        match result {
            ColumnarValue::Array(arr) => {
                let floats = as_float32_array(&arr)
                    .expect("failed to convert result to a Float32Array");

                assert_eq!(floats.len(), 4);
                assert!((floats.value(0) - 3.0).abs() < f32::EPSILON);
                assert!((floats.value(1) - 2.0).abs() < f32::EPSILON);
                assert!((floats.value(2) - 4.0).abs() < f32::EPSILON);
                assert!((floats.value(3) - 4.0).abs() < f32::EPSILON);
            }
            ColumnarValue::Scalar(_) => {
                panic!("Expected an array value")
            }
        }
    }
    #[test]
    // Test log() simplification errors
    fn test_log_simplify_errors() {