Guardfile

require 'active_support/core_ext/string'
# Defines the matching rules for Guard.

# rubocop:disable Metrics/BlockLength
guard :minitest, spring: 'bin/rails test', all_on_start: false do
  watch(%r{^test/(.*)/?(.*)_test\.rb$})
  watch('test/test_helper.rb') { 'test' }
  watch('config/routes.rb') { interface_tests }
  watch(%r{app/views/layouts/*}) { interface_tests }
  watch(%r{^app/models/(.*?)\.rb$}) do |matches|
    ["test/models/#{matches[1]}_test.rb",
     'test/integration/microposts_interface_test.rb']
  end
  watch(%r{^test/fixtures/(.*?)\.yml$}) do |matches|
    "test/models/#{matches[1].singularize}_test.rb"
  end
  watch(%r{^app/mailers/(.*?)\.rb$}) do |matches|
    "test/mailers/#{matches[1]}_test.rb"
  end
  watch(%r{^app/views/(.*)_mailer/.*$}) do |matches|
    "test/mailers/#{matches[1]}_mailer_test.rb"
  end
  watch(%r{^app/controllers/(.*?)_controller\.rb$}) do |matches|
    resource_tests(matches[1])
  end
  watch(%r{^app/views/([^/]*?)/.*\.html\.erb$}) do |matches|
    ["test/controllers/#{matches[1]}_controller_test.rb"] +
      integration_tests(matches[1])
  end
  watch(%r{^app/helpers/(.*?)_helper\.rb$}) do |matches|
    integration_tests(matches[1])
  end
  watch('app/views/layouts/application.html.erb') do
    'test/integration/site_layout_test.rb'
  end
  watch('app/helpers/sessions_helper.rb') do
    integration_tests << 'test/helpers/sessions_helper_test.rb'
  end
  watch('app/controllers/sessions_controller.rb') do
    ['test/controllers/sessions_controller_test.rb',
     'test/integration/users_login_test.rb']
  end
  watch('app/controllers/account_activations_controller.rb') do
    'test/integration/users_signup_test.rb'
  end
  watch(%r{app/views/users/*}) do
    resource_tests('users') +
      ['test/integration/microposts_interface_test.rb']
  end
end
# rubocop:enable Metrics/BlockLength

# Returns the integration tests corresponding to the given resource.
def integration_tests(resource = :all)
  if resource == :all
    Dir['test/integration/*']
  else
    Dir["test/integration/#{resource}_*.rb"]
  end
end

# Returns all tests that hit the interface.
def interface_tests
  integration_tests << 'test/controllers'
end

# Returns the controller tests corresponding to the given resource.
def controller_test(resource)
  "test/controllers/#{resource}_controller_test.rb"
end

# Returns all tests for the given resource.
def resource_tests(resource)
  integration_tests(resource) << controller_test(resource)
end