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RuboCop configuration which has the same code style checking as official Ruby on Rails.

Official RoR RuboCop Configuration

Add this line to your application'sGemfile:

gem"rubocop-rails_config"

Add this line to your application's.rubocop.yml:

inherit_gem:rubocop-rails_config:    -config/rails.yml

Or just run:

$rails generate rubocop_rails_config:install

If you'd like to changeTargetRubyVersion, seeCustomization.

assert_not andassert_not_xxx methods are Rails assertion extension, so if you want to use these methods, requireactivesupport gem and inheritActiveSupport::TestCase.

classAssertNotTest <ActiveSupport::TestCasedeftest_assert_not_methodassert_not ...(code)...enddeftest_assert_not_nil_methodassert_not_nil ...(code)...endend

See also.ActiveSupport::Testing::Assertions

If you'd like to customize the rubocop setting on your project, you can override it.

For example, if you want to changeTargetRubyVersion, you can do it like:

# .rubocop.ymlinherit_gem:rubocop-rails_config:    -config/rails.yml# Override SettingAllCops:TargetRubyVersion:3.0

This overridesconfig/rails.yml setting withTargetRubyVersion: 3.0.

The gem is available as open source under the terms of theMIT License.