Using Capybara to Test JavaScript that Makes HTTP Requests
Testing an application that integrates with an HTTP service can be tricky: Making a connection to another server is slow. Your tests can become dependent on data that lives outside the test suite. Going offline means you can’t run the tests. The service going down causes continuous integration to fail. It may seem like a world of pain, but you’re not going to let a few HTTP requests get between yo
How to Share a Session Between Sinatra and Rails
As Rails developers, we run into Sinatra apps all the time: gems such as Resque which expose a dashboard via Sinatra, legacy Sinatra apps that run alongside a main Rails app, and Sinatra APIs embedded within a Rails app, to name a few examples. Here’s a common problem: how do you share authentication between the apps? It would be really convenient to be able to do something like this in our Sinatr
Tips for Clojure Beginners
1. Learn the essentials with Clojure Koans Clojure Koans teaches you the basics of the language by providing a series of tests for you to turn green. The topics and tests are chosen well, and the project’s vibe is pleasant (“calling a function is like giving it a hug with parentheses”). Open a koan. Make it pass. Meditate. Enjoy enlightenment. 2. Move on to 4Clojure problems 4Clojure is a great wa
Sandi Metz' Rules For Developers
Back in January, Sandi Metz introduced her rules for developers in a Ruby Rogues podcast episode episode. Around the time Sandi’s rules were published, the team I am on was starting a new project. This post details the experience of that team applying Sandi’s rules to the new application. The rules _There are four rules._ Here are the rules: Classes can be no longer than one hundred lines of code.
Evaluating Alternative Decorator Implementations In Ruby
Recently, decorators have become a big part of my Ruby on Rails life. We used them heavily in a recent client project, Harold Giménez wrote a great post about them, Avdi Grimm is writing about them in Objects on Rails, and Jeff Casimir has a great presentation about them. Until recently, I still had some questions, however, such as: Should I roll my own decorators? If I roll my own, what are the t
Rails Refactoring Example: Introduce Null Object
if object.kind_of?(User) do_this else object.do_that end Why not? Because Ruby encourages duck typing and polymorphism. A hidden version Here’s the same principle: This checks that object is of type NilClass instead of type User. The pattern There’s an old pattern called Null Object that addresses this special case of avoiding type-checking in favor of duck typing. Here’s an example of the “Introd
Introducing Bourbon Neat, a Sass-based responsive grid framework
And the result would be: Here are some live examples of what you can build with Neat. Why another grid framework We built Neat with the aim of promoting clean and semantic markup; it relies entirely on Sass mixins and does not pollute the HTML with presentation classes and extra wrapping divs. It is less explicit—as in requires fewer mixins—than most other Sass-based frameworks and comes with buil
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