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Test Driven Development and Rspec 2 Breccan McLeod-Lundy @breccan

Test Driven Development RED GREEN REFACTOR

A Simple Spec describe ProjectsController do context "logged in user" do before(:each) do @user = User.make ApplicationController.stub(:current_user).and_return(@user) End it "should do something" do @user.should_receive(:do_stuff).and_return(true) post :do_stuff end end end

Mocks and Stubs Double('classname) mock_model(Model, :variables) thing.stub(:action) { 'value' } Thing.stub_chain(:meth1, :meth2).and_return(cake) double('topic', :title => 'front')

Methods: .should() .should_not() # NOT != .should_receive() .with() .and_return() Actions post :action, :param => “value”

Expectations be_something? #Checks for method something? and calls it. be_valid #Checks for validity

Expectations(cont) .ordered .should_receive(1, 2, 3) .should_receive(“cake”).once .exactly .at_least etc

Expectations(cont) have_key = has_key? have(10).somethings match(/cake/) Thing.stub_chain(:meth1, :meth2).and_return(cake) double('topic', :title => 'front') raise_error(CakeIsLieError) throw_symbol(:cake) be_close(:expected, margin)

Rspec.configure Rspec.configure do |c| c.filter = { :important => true } c.exclusion_filter = { :slow => true } End #Runs this block describe “tests”, :important => true do it “does something” do end #excludes this test it “does something slow”, :slow => true do end End #You can put lambdas in there too.

Macros config.extend(ControllerMacros, :type => :controller) # in your Spec::Runner config Say you want: get :index do should_render "index" should_do_stuff end

Create a new ControllerMacros module with methods that construct appropriate it() statements. And add something like: def get(action) define_method :do_request do get action end yield end

Capybara within("li#employee") do fill_in 'Name', :with => 'Jimmy' End save_and_open_page #opens a snapshot of page Capybara.default_wait_time #lets you set how long to wait between actions for ajax when you're checking content.

Capybara + WebDriver $ sudo gem install cucumber cucumber-rails $ ./script/generate cucumber --capybara --rspec $ RAILS_ENV=cucumber rake gems:install Capybara.default_driver = :selenium Or use tags(@javascript etc) and only use selenium for relevant tests: Capybara.javascript_driver = :selenium

Other Important Things Rspec is now in pieces Cucumber Autotest CI

Test Driven Development and Rspec 2 Breccan McLeod-Lundy @breccan P.S. Don't forget Railscamp http://railscamps.com

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by breccan on Dec 17, 2010

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