added power function

Author: vince19972

sketch.js

@@ -29,6 +29,14 @@ function anomalyCode(x) {
   return '5' + x - x;
 }
 
+function anomalyCode(x) {
+  return '5' + x - x;
+}
+
+function power(base, exponent) {
+  return Math.pow(base, exponent);
+}
+
 module.exports = {
   sum: sum,
   sub: sub,
@@ -37,5 +45,6 @@ module.exports = {
   digital_root: digital_root,
   sayHelloTo: sayHelloTo,
   answer: answer,
-  anomalyCode: anomalyCode
+  anomalyCode: anomalyCode,
+  power: power
 }

sketch.test.js

@@ -1,4 +1,4 @@
-const { sum, sub, prod, digital_root, sum42, sayHelloTo, anomalyCode } = require('./sketch');
+const { sum, sub, prod, digital_root, sum42, sayHelloTo, anomalyCode, power } = require('./sketch');
 
 // test('adds 1 + 2 to equal 3', () => {
 //   expect(sum(1, 2)).toBe(3);
@@ -93,3 +93,7 @@ test('anomalyCode hundred should be 5000', () => {
 test('anomalyCode thousand should be 50000', () => {
   expect(anomalyCode(7891)).toBe(50000);
 })
+
+test('power of one number', () => {
+  expect(power(2, 2)).toBe(4);
+});