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I am following this tutorial. In listing 1.1, it states:
Be aware that we’ll be using Rspec as the testing suite, so just make sure you include the -T option when creating the rails application.
What does the -T option do in this case?
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The syntax starts with the rails keyword “rails”. The keyword “rails” ensure to denote that the specific operation is a rails based operation. Hence the rails command executor will be triggered in the background. The command executor follows that the operation is a “ new “ creation operation. . Following this has to be the Application Name value.
By default, every Rails application has three environments: development, test, and production. Each environment's configuration can be modified similarly. In this case, we can modify our test environment by changing the options found in config/environments/test.rb. Your tests are run under RAILS_ENV=test.
To see your application in action, open a browser window and navigate to http://localhost:3000. You should see the Rails default information page: When you want to stop the web server, hit Ctrl+C in the terminal window where it's running.
Most of the work in this tutorial will happen in the app folder, but here's a basic rundown on the function of each of the files and folders that Rails creates by default: Contains the controllers, models, views, helpers, mailers, channels, jobs, and assets for your application.
If you type:
rails -h
You'll see it explains the -T option like so:
-T, [--skip-test-unit], [--no-skip-test-unit] # Skip Test::Unit files
In other words, this command tells Rails to skip the generation of Test::Unit files and folders. (Test::Unit is the default Rails testing framework.)
Without the -T option, two things happen by default:
The rails app is intialized with a test directory containing:
test/controllers
test/fixtures
test/helpers
test/integration
test/mailers
test/models
test_helper.rb
You won't need these directories or the test_helper because you'll be using RSpec, which has it's own folder structure and helpers.
Test::Unit test cases are auto-generated whenever you generate a model, controller, scaffold, etc.
This is also unneeded because once you install RSpec, you'll be using RSpec's automatic spec generators.
Hope that helps!
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