1 files changed, 30 insertions, 1 deletions
diff --git a/big-integer/spec/spec.js b/big-integer/spec/spec.js
index 4d01dd8..be999e9 100644
--- a/big-integer/spec/spec.js
+++ b/big-integer/spec/spec.js
@@ -630,6 +630,9 @@ describe("BigInteger", function () {
             } catch (e) {
                 expect(true).toBe(true);
             }
+
+            expect(bigInt(2).modPow(-3, 11)).toEqualBigInt(7);
+            expect(bigInt(76455).modPow(-3758223534, 346346)).toEqualBigInt(339949);
         });
     });
 
@@ -818,7 +821,7 @@ describe("BigInteger", function () {
             }
         });
         it("correctly identifies pseudo primes", function () {
-            var largePrimes = ["3825123056546413051", "3825123056546413051", "3825123056546413051", "318665857834031151167461"];
+            var largePrimes = ["4033", "4681", "3825123056546413051", "3825123056546413051", "3825123056546413051", "318665857834031151167461"];
             for (var i = 0; i < largePrimes.length; i++) {
                 expect(bigInt(largePrimes[i]).isPrime()).toBe(false);
             }
@@ -854,6 +857,24 @@ describe("BigInteger", function () {
                 }
             }
             expect(falsePrimes / totalPrimes < 0.001).toBe(true);
+        });
+        it("is predictable given predictable rng", function () {
+            function getProbablePrimes(fakeRNG) {
+              var result = [];
+              for (var i = 1; i < 100; i++) {
+                  var x = bigInt(i);
+                  if (x.isProbablePrime(1, fakeRNG)) {
+                    result.push(i);
+                  }
+              }
+              return result;
+            }
+            for (var i = 0; i < 100; i++) {
+              function fakeRNG() {
+                return (i * 0.3571) % 1;
+              }
+              expect(getProbablePrimes(fakeRNG)).toEqual(getProbablePrimes(fakeRNG));
+            }
         });
     });
 
@@ -1153,6 +1174,14 @@ describe("BigInteger", function () {
                 expect(Math.abs(buckets[i] - ideal) / ideal < 0.1).toBe(true);
             }
         });
+        it("is predictable given predictable rng", function () {
+            for (var i = 0; i < 1e3; i++) {
+              function fakeRNG() {
+                return (i * 0.3571) % 1;
+              }
+              expect(bigInt.randBetween(0, 1024, fakeRNG)).toEqualBigInt(bigInt.randBetween(0, 1024, fakeRNG));
+            }
+        });
     });
 
     describe("isInstance", function () {