Add counter snippet

test/counter/counter.test.js

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