RailsBridge: do some testing

Take a look at the Rails Guide to Testing: http://guides.rubyonrails.org/testing.html

Rails has unit testing using MiniTest by default.
When you ran the scaffolding it created a controller test /test/controllers/topics_controller_test.rb

Add to /test/models/topic_test.rb:

class TopicTest < ActiveSupport::TestCase
  test "set a title" do
    t = Topic.new
    t.title = "Hi there"
    assert t.title == "Hi theres"
  end
end

run the tests:

$ rails test


Add to gemfile:

gem 'rspec-rails'

rails g rspec:install

...soem more stuff about rspec testing....

Capybara:

Cloud 9 might need headless https://www.stefanwienert.de/blog/2015/07/24/how-to-install-capybara-webkit-for-ubuntu-12-dot-04/