Perform multiple checks of circuit in test.

src/circuit/sapling/mod.rs

@@ -571,6 +571,7 @@ fn test_input_circuit_with_bls12_381() {
 
     let tree_depth = 32;
 
+    for _ in 0..10 {
         let value_commitment = ValueCommitment {
             value: rng.gen(),
             randomness: rng.gen()
@@ -689,6 +690,7 @@ fn test_input_circuit_with_bls12_381() {
             assert_eq!(cs.get_input(7, "pack nullifier/input 1"), expected_nf[1]);
         }
     }
+}
 
 #[test]
 fn test_output_circuit_with_bls12_381() {
@@ -701,6 +703,7 @@ fn test_output_circuit_with_bls12_381() {
     let params = &JubjubBls12::new();
     let rng = &mut XorShiftRng::from_seed([0x3dbe6258, 0x8d313d76, 0x3237db17, 0xe5bc0654]);
 
+    for _ in 0..100 {
         let value_commitment = ValueCommitment {
             value: rng.gen(),
             randomness: rng.gen()
@@ -771,3 +774,4 @@ fn test_output_circuit_with_bls12_381() {
             assert_eq!(cs.get_input(5, "commitment/input variable"), expected_cm);
         }
     }
+}