RuboCop RSpec
RSpec-specific analysis for your projects, as an extension to RuboCop.
Installation
Just install the rubocop-rspec gem
gem install rubocop-rspec
or if you use bundler put this in your Gemfile
gem 'rubocop-rspec'
Usage
You need to tell RuboCop to load the RSpec extension. There are three ways to do this:
RuboCop configuration file
Put this into your .rubocop.yml.
require: rubocop-rspec
Now you can run rubocop and it will automatically load the RuboCop RSpec
cops together with the standard cops.
Command line
rubocop --require rubocop-rspec
Rake task
RuboCop::RakeTask.new do |task|
task.requires << 'rubocop-rspec'
end
Code Climate
rubocop-rspec is available on Code Climate as part of the rubocop engine. Learn More.
Documentation
You can read more about RuboCop-RSpec in its official manual.
Inspecting files that don't end with _spec.rb
By default, rubocop-rspec only inspects code within paths ending in _spec.rb or including spec/. You can override this setting in your config file by specifying one or more patterns:
# Inspect all files
AllCops:
RSpec:
Patterns:
- '.+'
# Inspect only files ending with `_test.rb`
AllCops:
RSpec:
Patterns:
- '_test.rb$'
The Cops
All cops are located under
lib/rubocop/cop/rspec, and contain
examples/documentation.
In your .rubocop.yml, you may treat the RSpec cops just like any other
cop. For example:
RSpec/FilePath:
Exclude:
- spec/my_poorly_named_spec_file.rb
Non-goals of RuboCop RSpec
Enforcing should vs. expect syntax
Enforcing
expect(calculator.compute(line_item)).to eq(5)
over
calculator.compute(line_item).should == 5
is a feature of RSpec itself – you can read about it in the RSpec Documentation
Enforcing an explicit RSpec receiver for top-level methods (disabling monkey patching)
Enforcing
Rspec.describe MyClass do
...
end
over
describe MyClass do
...
end
can be achieved using RSpec's disable_monkey_patching! method, which you can read more about in the RSpec Documentation. This will also prevent should from being defined on every object in your system.
Before disabling should you will need all your specs to use the expect syntax. You can use Transpec, which will do the conversion for you.
Contributing
Checkout the contribution guidelines.
License
rubocop-rspec is MIT licensed. See the accompanying file for
the full text.