chargify/chargify_api_ares — pull request #53 by ryansch (2012-09-11 22:20:58+00:00)
Title: Adding support for validating coupon codes

Like so:

```ruby
Chargify::Coupon.validate(:product_family_id => 123, :coupon_code => 'foobar123')
```

Also:
Tests!