After setting up your new rails app, add ‘rspec-rails’ to your Gemfile, then rebundle.
Generate your rspec files with the command rails g rspec:install in your terminal. This will give you all the setup testing files that you need to get started with testing your Rails application.
Write your tests in your spec/ file, then run rspec in your command line. This will run all of your tests in the spec/ folder.
File Organization for RSpec
Convention says that feature tests go into a features folder, controller tests in a controller/ folder, models in a models/ folder, etc. Naming conventions for test files are to always end them in _spec.rb.
Naming Conventions in RSpec
If you create a controller spec file, name it thisismycontroller_controller_spec.rb and place it into a controllers folder within spec, whereas for models just name it goal_spec.rb within the models folder within spec. The same goes for features, except you name a feature close to what it does instead of any other name. For example, writing an associations feature, like I recently did, I called the feature test associating_X_with_Y_spec.rb within the features/folder.
Run Specific Tests with RSpec
If you want to run specific tests in the spec folder, simply run rspec path/to/your/test.
Congratulations
You are up and running with RSpec in your Rails application!