DatabaseCleaner gem setup for RSpec

database_cleaner.rb

# file: spec/support/database_cleaner.rb
require 'database_cleaner'

# More info: https://github.com/DatabaseCleaner/database_cleaner
RSpec.configure do |config|
  config.before(:suite) do
    # Ensure a clean slate
    DatabaseCleaner.clean_with(:truncation)
  end

  config.around(:each) do |example|
    if example.metadata[:js]
      # JS-based tests use multiple processes, so we can't use database
      # transactions there.
      DatabaseCleaner.strategy = :truncation
    else
      DatabaseCleaner.strategy = :transaction
    end
    DatabaseCleaner.start
    example.run
    DatabaseCleaner.clean
  end
end