Improve code quality and write tests

node_modules/argparse/lib/action/store/true.js

@@ -0,0 +1,26 @@
+/*:nodoc:*
+ * class ActionStoreTrue
+ *
+ * This action store the values True respectively.
+ * This isspecial cases of 'storeConst'
+ *
+ * This class inherited from [[Action]]
+ **/
+'use strict';
+
+var util = require('util');
+
+var ActionStoreConstant = require('./constant');
+
+/*:nodoc:*
+ * new ActionStoreTrue(options)
+ * - options (object): options hash see [[Action.new]]
+ *
+ **/
+var ActionStoreTrue = module.exports = function ActionStoreTrue(options) {
+  options = options || {};
+  options.constant = true;
+  options.defaultValue = options.defaultValue !== null ? options.defaultValue : false;
+  ActionStoreConstant.call(this, options);
+};
+util.inherits(ActionStoreTrue, ActionStoreConstant);