added test
added test

SarahNoel/node-stripe-charge,mjhea0/node-stripe-charge,mjhea0/node-stripe-charge,amberwoodrow/node-stripe-charge,lingqingmeng/preorder,kolbeypruitt/mtm_official,amberwoodrow/node-stripe-charge,lingqingmeng/preorder,kolbeypruitt/mtm_official,SarahNoel/node-stripe-charge