tweaks and trying to add a command

test.js

@@ -0,0 +1,9 @@
+var assert = require('assert');
+
+describe('Array', function() {
+    describe('#indexOf()', function() {
+        it('should return -1 when the value is not present', function(){
+            assert.equal(-1, [1,2,3].indexOf(4));
+        });
+    });
+});