From f239684a661915e976c6c8241e377585655b0f03 Mon Sep 17 00:00:00 2001
From: Manraj Singh Grover <manrajsinghgrover@gmail.com>
Date: Sat, 11 Nov 2017 11:14:19 +0530
Subject: [PATCH] Test Modular Inverse: Adds tests for Fermet's Modular inverse

---
 test/algorithms/math/testModularInverse.js | 29 ++++++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/test/algorithms/math/testModularInverse.js b/test/algorithms/math/testModularInverse.js
index f9be494a..857f433a 100644
--- a/test/algorithms/math/testModularInverse.js
+++ b/test/algorithms/math/testModularInverse.js
@@ -1,6 +1,31 @@
 /* eslint-env mocha */
-const modularInverse = require('../../../src').algorithms.math.modularInverse;
+const modularInverse = require('../../../src').algorithms.math.modularInverse.modularInverse;
+const fermetModularInverse = require('../../../src').algorithms.math.modularInverse.fermetModularInverse;
 
 const assert = require('assert');
 
-describe('Modular Inverse', () => { });
+describe('Modular Inverse', () => {
+  it('should return `null` for either or both numbers as 0', () => {
+    assert.equal(modularInverse(0, 10), null);
+    assert.equal(modularInverse(10, 0), null);
+    assert.equal(modularInverse(0, 0), null);
+  });
+
+  it('should return modular inverse of two numbers', () => {
+    assert.equal(modularInverse(3, 11), 4);
+    assert.equal(modularInverse(65, 11), 10);
+    assert.equal(modularInverse(3, 2), 1);
+  });
+
+  it('should return `null` for either or both numbers as 0', () => {
+    assert.equal(fermetModularInverse(0, 10), null);
+    assert.equal(fermetModularInverse(10, 0), null);
+    assert.equal(fermetModularInverse(0, 0), null);
+  });
+
+  it('should return modular inverse of two numbers', () => {
+    assert.equal(fermetModularInverse(3, 11), 4);
+    assert.equal(fermetModularInverse(65, 11), 10);
+    assert.equal(fermetModularInverse(3, 2), 1);
+  });
+});