Our first tests: behavior-driven development, using 'integration test' or known as 'request specs' (RSpec)
$ rails generate integration_test static_pages
      invoke  rspec
      create    spec/requests/static_pages_spec.rb

Change-Id: Ib8ee7f90976734eeae071c9fe6a56d6c46c6e552
First test case: expect the static_page/home to contain 'Sample App'
Run it using '$ bundle exec rspec spec/requests/static_pages_spec.rb'

Change-Id: I0880dca173801a9ccc8cffd8ee74fa9d3a8c42d8