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Test that d = -121665/121666

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Henry de Valence 2017-01-08 14:56:52 -05:00
parent 3f7d06138a
commit 8fb9e44dd2
1 changed files with 11 additions and 0 deletions
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11
src/constants.rs
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@ -1455,4 +1455,15 @@ mod test {
let sqrt_m1_sq = &constants::SQRT_M1 * &constants::SQRT_M1;
assert_eq!(minus_one, sqrt_m1_sq);
}
#[test]
/// Test that d = -121665/121666
fn test_d_vs_ratio() {
let a = FieldElement([-121665,0,0,0,0,0,0,0,0,0]);
let b = FieldElement([ 121666,0,0,0,0,0,0,0,0,0]);
let d = &a * &b.invert();
let d2 = &d + &d;
assert_eq!(d, constants::d);
assert_eq!(d2, constants::d2);
}
}