Update

MOCHA/operations.test.js

@@ -0,0 +1,32 @@
+var operations = require('./operations');
+
+it('should multiply two numbers', function () {
+    var expectedResult = 15;
+    var result = operations.multiply(3, 5);
+    if (result !== expectedResult) {
+        throw new Error(
+            `Expected ${expectedResult}, but got ${result}`
+        );
+    }
+});
+it('should add two numbers', function () {
+    var expectedResult = 16;
+    var result = operations.add(9, 7);
+    if (result !== expectedResult) {
+        throw new Error(
+            `Expected ${expectedResult}, but got ${result}`
+        );
+    }
+});
+
+it('shoud async multiply two numbers', function (done) {
+    var expectedResult = 12;
+    operations.multiplyAsync(4, 3, function (result) {
+        if (result !== expectedResult) {
+            throw new Error(
+                `Expected ${expectedResult}, but got ${result}`
+            );
+        }
+        done();
+    });
+});