Ex1/tests/test.rs

#[cfg(test)]
mod tests {
    use apet_ex1::{circuit::Circuit, scalar_to_bits::scalar_to_bits};
    use curve25519_dalek::scalar::Scalar;
    use num_bigint::BigUint;
    use rand::rngs::OsRng;
    #[test]
    fn test_scalar_comparison_via_circuit() {
        for _ in 0..100 {
            let a = Scalar::random(&mut OsRng);
            let b = Scalar::random(&mut OsRng);

            // Convert to bit representation
            let a_bits = scalar_to_bits(&a);
            let b_bits = scalar_to_bits(&b);

            // Combine A and B bits into one input vector
            let mut input_bits = Vec::with_capacity(512);
            input_bits.extend_from_slice(&a_bits);
            input_bits.extend_from_slice(&b_bits);

            // Evaluate the comparison circuit
            let circuit = Circuit::compare_n_bit_numbers(256, input_bits);
            let circuit_result = circuit.clone().eval();

            // Compare expected result using BigUint
            let a_int = BigUint::from_bytes_le(&a.to_bytes());
            let b_int = BigUint::from_bytes_le(&b.to_bytes());
            let expected = a_int > b_int;

            assert_eq!(
                circuit_result, expected,
                "Mismatch: A = {:?}, B = {:?}, A > B = {}, but circuit says {}",
                a_int, b_int, expected, circuit_result
            );
        }
    }
}