ran npm run tdd & generated TDD

test/luhnCheck/luhnCheck.js

@@ -0,0 +1,10 @@
+module.exports = num => {
+let arr = (num + '')
+.split('')
+.reverse()
+.map(x => parseInt(x));
+let lastDigit = arr.splice(0, 1)[0];
+let sum = arr.reduce((acc, val, i) => (i % 2 !== 0 ? acc + val : acc + (val * 2) % 9 || 9), 0);
+sum += lastDigit;
+return sum % 10 === 0;
+};

test/luhnCheck/luhnCheck.test.js

@@ -0,0 +1,13 @@
+const test = require('tape');
+const luhnCheck = require('./luhnCheck.js');
+
+test('Testing luhnCheck', (t) => {
+	//For more information on all the methods supported by tape
+	//Please go to https://github.com/substack/tape
+	t.true(typeof luhnCheck === 'function', 'luhnCheck is a Function');
+	//t.deepEqual(luhnCheck(args..), 'Expected');
+	//t.equal(luhnCheck(args..), 'Expected');
+	//t.false(luhnCheck(args..), 'Expected');
+	//t.throws(luhnCheck(args..), 'Expected');
+	t.end();
+});