How to configure Cucumber and Capybara to use the Rack::Test driver? - cucumber

Question

I am a newbie to Capybara.
Here is my configuration within file env.rb
Capybara.configure do |config|
config.run_server = false
#config.default_driver = :selenium
config.default_driver = :rack_test
config.app_host = 'point to my localhost port 3000'
end
Everything runs just fine if I set default_driver to :selenium. But I need to set the driver to :rack_test, so that when running cucumber command, it will not open the web browser.
Many thanks,
P/S If you are an expert, please show me the learning path, I'm not expecting someone showing them selves.

Answer 1

I presume you want to test against a test server controlled by capybara (which is the normal way to do it), rather than testing against your dev instance (the one at localhost:3000) or a staging server or something.
First, configure capybara to run your Rails app. The usual way to do this is to add the cucumber-rails gem to your Gemfile and require 'cucumber/rails' in your env.rb. You can also set up capybara to run Rails (or any Rack app) manually.
Having done that, capybara will do what you want (use the Rack::Test driver) by default. Remove the configuration that you showed from your env.rb and Cucumber/capybara will work the way you want.
If you also want some scenarios to use Javascript, tag those scenarios with #javascript and add
Capybara.javascript_driver = :selenium
to your env.rb. Capybara will continue to use its Rack::Test driver for scenarios without the tag, and will use its Selenium driver for scenarios with the tag.

Answer 2

Thank you Dave for helping me during the time. Briefly, in order for running "cucumber" without triggering to open a web-browser (which is rack-test), here is the configuration:
1> File env.rb.
require 'cucumber/rails'
Only 1 line above is enough.
2> File .feature
Feature: Post a new Product
Feature: Post a new Product
Scenario: Open new product page
Given I open new product site
When I input new product
Then I should see the product created confirmed
By the way, we don't need "Capybara.javascript_driver = :selenium" within file env.rb.
There's still so many tricky things I need to learn about capybara and cucumber