--warnings option (run with warnings enabled)

Use the --warnings option to run specs with warnings enabled.

Given a file named “example_spec.rb” with:

RSpec.describe do it 'generates warning' do $undefined end end 

When I run rspec --warnings example_spec.rb

Then the output should contain “warning”.

Given a file named “example_spec.rb” with:

def foo(**kwargs) kwargs end RSpec.describe do it "should warn about keyword arguments with 'rspec -w'" do expect(foo({a: 1})).to eq({a: 1}) end end 

When I run rspec -w example_spec.rb

Then the output should contain “warning”.

Given a file named “example_spec.rb” with:

RSpec.describe do it 'generates warning' do $undefined end end 

When I run rspec example_spec.rb

Then the output should not contain “warning”.