Zan's Collection of anything useful » Rails

Test for blank elements with Culerity-Cucumber

zan — Wed, 07 Apr 2010 07:13:30 +0000

When you need to test for blank elements on Culerity, it is better to parse the html. Using Celerity helper methods such as $browser.button will return a Culerity::RemoteObjectProxy object. It does not tell you if it found an element or not. It is a limitation of Culerity. To work around it try this:

You can use the above code in the step definitions.

How to shoot yourself in the foot using a functional programming language

zan — Tue, 09 Mar 2010 03:46:31 +0000

While preparing for a presentation on Scala, I added some jokes on the functional languages. Here’s the original version and the new editions

Erlang
You create a dozen clones of youself, pass the gun to one another in turn to shoot at each other’s foot

Python
You have to align your foot 10 steps below the gun for it to work

Ruby
You pull the trigger to find popcorns popping out of the gun. Someone somewhere has just made all guns shoot popcorns.

Haskell
Close your eyes and picture a gun in your mind. Think about the foot being shot. Open your eyes. You found your foot shot. No sound. No smell. No one else even noticed.

Scala
You pull the trigger and you got shot. You stab your foot with the gun and you got shot.

Selectively load Ruby Facets modules

zan — Tue, 12 Jan 2010 09:43:39 +0000

Ruby facets has a lot of useful libraries. Sometimes you only want to load the ones that you need. Here’s a little snippet that you can use

Rails won’t load facets as the ‘lib’ param is false. We then load the libraries manually through initializers. This helps when facets unwittingly clobbers some of the other gems you are using.

Using Cucumber to test Paperclip file attachments

zan — Mon, 31 Aug 2009 15:23:45 +0000

I was using thoughtbot’s paperclip to attach files. I realised that paperclip only provide shoulda macros for test::unit. No cucumber macros? In the end, I got to write it. Its very simple.

The feature is shown here:

Define your steps:

As celerity does not have an attach_file method, I got to write my own. You could see it’s not hard at all. Remember to define the browser variable.

Last, we have some hooks to clean up the test upload files. Remember to place an @upload tag in your scenario.