By Charles Feduke
RSpec is a behaviour pushed improvement framework for Ruby programmers. It comes built-in with its personal mocking framework according to Jmock. This publication introduces you to RSpec assisting you to write down idiomatic necessities for Ruby code in a attempt first approach.
Instant RSpec Test-Driven improvement How-to is full of examples of exact code observed by way of factors and covers basic Ruby, Rails, and RSpec use instances plus a number of the extra complicated subject matters. RSpec attempt pushed improvement is written at the premise that you'll want no adventure with RSpec and restricted adventure with Ruby, Rails, and TDD basics. You’ll start via writing an easy Ruby library in actual TDD style and and use the pink, eco-friendly, refactor instruments emigrate this library right into a Rails application.
Instant RSpec Test-Driven improvement How-to will educate you the particular steps played in writing an idiomatic specification. it is possible for you to to write down a try for the code you need you had, and discover ways to write purely the minimal code essential to go a try out, and write extra requisites to force out the creation performance your program will desire. during the process the publication, you'll convert a Ruby application right into a new Rails program, attempt Rails specifics reminiscent of dossier uploads, cookies, and version validation or even the way to use Capybara. RSpec attempt pushed improvement may also help you construct self assurance within the code they you write and spend much less time facing insects and upkeep complications.
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Additional info for Instant RSpec Test-Driven Development How-to
1. First, we'll need to register routes to the controller. This is not only easy to do but can be test-driven as well. rb 2. should_not be_routable end end end A lot of routes are being verified in the previous code. This is acceptable, although we end up essentially verifying the framework code, which isn't the real goal of TDD. But if you're not familiar with Rails routing, using tests to drive this configuration is a great way to arrive at a working implementation. 3. draw block): resources :locations, :except => [:edit, :update] 4.
As Capybara executes on a separate thread and the majority of the testing techniques in the Rails environment rely on database transactions, validating the state of the database when a spec finishes is unreliable. Instead, focus on what the end user should see as a result of these scripted actions. The fill_in helper method used is case sensitive; it can accept a variety of arguments for selectors but the two most commonly used are selecting the label by its text, as shown in the previous code example, and the field by name.
How to do it... 1. Test drive a route. The test is omitted for brevity but the relevant config/routes. rb file is: post "locations/near/:id" => "locations#near" 2. should render_template("near") end end end 41 Instant RSpec Test-Driven Development How-to 3. 0) end 4. erb The specs pass, which means that the behavior requested that Location#find is invoked with the numeric value 42 and the location mock returned has its #near? method invoked with the expected arguments. The default action is to render the near view, which passes our assertion and immediately raises a red flag, as we want to see the test fail at first.