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Bachue Zhou, profile picture
Uploaded byBachue Zhou
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Introduce cucumber

This document discusses behavior driven development (BDD) and Cucumber style testing. It provides examples of how to set up Cucumber testing for a Rails application, including installing Cucumber gems, configuring support files, and writing a sample feature file to test user sign up. Code snippets are provided for setting up Cucumber configuration files, installing necessary gems, and defining step definitions. The document aims to demonstrate how Cucumber can be used to write automated tests in a human-readable format.

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Ruby on Rails Overview•
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Why should we use automatic test framework?
A long long story…
Why should we choose ?
Test Driven Development
cCan you understand it? No, I can’t
Behavior Driven Development
Feature: Now User has given all his basic info and decided which products he will buy, then he forward into the last process - pay the money. /registration/business_pay will summarize the price(including tax and discount) he will pay and let user fill in his credit card info, when he presses "Confirm", it will charge his credit card. Scenario: Now user input credit card info and press "Confirm", the page will submit his info to AriaSystem, AriaSystem will validate his credit card info, charge his credit card and return some data to our database. Then our database will save his personal info and partner info. If all these work well, user will be redirected to /registration/business_finish. Given I reach /registration/business_pay When I fill in basic info into /registration/business_pay And I press "Confirm" Then I should see "Please wait..." And I waiting for being redirected to "/registration/business_finish" And all MozyPro data in Database is correct
Everyone can read it
Everyone can write it Include people who don’t speak English
How does it test?
Open a real browser
Behave as a real user
Apply to any page, any website
Not only BDD
But also DDD Document Driven Development
Cucumber Style Document
More secrets ?
Step Definitions Given /^I am in "([^"]*)"$/ do |url| visit mozy_url(url, :https => true) end Then /^I would be redirected to "([^"]*)"$/ do |url| page.current_url.should be_include?mozy_url(url, :https => true) end
Have a try ? Let’s write a simple Cucumber test case
Sign up an Account
Gemfile group :test do gem 'cucumber' gem 'cucumber-rails', require: false gem 'capybara', git: 'https://github.com/jnicklas/capybara.git' gem 'rspec' #use rspec expectation gem 'Selenium' #use firefox to test gem 'database_cleaner' #clean database after each test case end $ bundle install
Install Cucumber $ rails generate cucumber:install create config/cucumber.yml create script/cucumber chmod script/cucumber create features/step_definitions create features/support create features/support/env.rb exist lib/tasks create lib/tasks/cucumber.rake gsub config/database.yml gsub config/database.yml force config/database.yml
features/support/env.rb require 'cucumber/rails’ Capybara.default_selector = :css Capybara.default_driver = :selenium #add this line ActionController::Base.allow_rescue = false begin DatabaseCleaner.strategy = :transaction rescue NameError raise "You need to add database_cleaner to your Gemfile (in the :test group) if you wish to use it." End Cucumber::Rails::Database.javascript_strategy = :truncation
features/sign_up.feature Feature: Sign up Scenario: I will register a user with email "zhour@vmware.com" and password "vmware” Given I fill in email "zhour@vmware.com" and password "vmware" in sign up page When I press "Sign up" Then I should see "Page#index"
$ rake cucumber
features/step_definitions/sign_up.rb
it works
Firefox
Thanks