I’ve been writing a fair number of functional tests recently, one thing that kept cropping up was the need to check if a form had been rendered and that it is going to perform a particular action. Shoulda has a should_render_a_form macro, unfortunately it’s been depreciated and doesn’t do anything other than check a form element has been rendered in the view.
I decided to come up with my own macro that checks the specifics of a form element, enter should_render_a_form_to. This takes three arguments, a description, an options hash and a block that contains the expected url. You can use the macro as follows…
Check there is a form posting to the new_user_post_path:
Check there is a form putting to the user_post_path and that the form has the id of ‘post_edit_form’:
The macro code is available on github with test coverage. If you just want to cut and paste into your own macro’s file:
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The macro checks both the forms action attribute as well as the hidden input rails uses to specify the method where necessary. I’ve also been playing with creating a macro to check for a form with specific fields such as should_render_a_form_with_fields. This is proving to be slightly more difficult than I originally anticipated and defining a nice interface to the method has been rather tricky.