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orchard
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constants.rs: Add unit tests for T_P, T_Q constants.

This commit is contained in:
therealyingtong 2021-06-15 13:37:12 +08:00
parent 5ae9890913
commit 747f71ca80
1 changed files with 15 additions and 1 deletions
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16
src/constants.rs
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@ -268,7 +268,7 @@ fn test_zs_and_us<C: CurveAffine>(base: C, z: &[u64], u: &[[[u8; 32]; H]], num_w
#[cfg(test)]
mod tests {
use ff::PrimeField;
use pasta_curves::pallas;
use pasta_curves::{arithmetic::FieldExt, pallas};
#[test]
// Nodes in the Merkle tree are Pallas base field elements.
@ -287,4 +287,18 @@ mod tests {
fn l_orchard_scalar() {
assert_eq!(super::L_ORCHARD_SCALAR, pallas::Scalar::NUM_BITS as usize);
}
#[test]
fn t_q() {
let t_q = pallas::Scalar::from_u128(super::T_Q);
let two_pow_254 = pallas::Scalar::from_u128(1 << 127).square();
assert_eq!(t_q + two_pow_254, pallas::Scalar::zero());
}
#[test]
fn t_p() {
let t_p = pallas::Base::from_u128(super::T_P);
let two_pow_254 = pallas::Base::from_u128(1 << 127).square();
assert_eq!(t_p + two_pow_254, pallas::Base::zero());
}
}