From b6f2ab337703286a78454fbfb62ad5d027b62cd4 Mon Sep 17 00:00:00 2001
From: Sean Bowe <ewillbefull@gmail.com>
Date: Sun, 2 Apr 2017 13:48:53 -0600
Subject: [PATCH] Add test that y coordinate remains 1 in jacobian when G1/G2
 are negated.

---
 src/groups/mod.rs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/groups/mod.rs b/src/groups/mod.rs
index fb19ef7..8983779 100644
--- a/src/groups/mod.rs
+++ b/src/groups/mod.rs
@@ -947,4 +947,12 @@ fn affine_fail() {
 fn affine_ok() {
     let res = AffineG1::new(Fq::one(), G1Params::coeff_b());
     assert!(res.is_err(), "Affine initialization should be ok because the point is on the curve");    
-}
\ No newline at end of file
+}
+
+fn test_y_at_point_at_infinity() {
+    assert!(G1::zero().y == Fq::one());
+    assert!((-G1::zero()).y == Fq::one());
+
+    assert!(G2::zero().y == Fq2::one());
+    assert!((-G2::zero()).y == Fq2::one());
+}