free_mutant/spec/unit/mutant/matcher/null_spec.rb
Markus Schirp 6df5811a87 Use RSpec as receiver for rspec DSL methods
* I dislike the global infection RSpec does. This commit is a first step
  to get a rid of it.
* Also remove the need for `require 'spec_helper` in each spec file with
  adjusting `.rspec`.
2014-08-10 21:04:07 +00:00

24 lines
563 B
Ruby

RSpec.describe Mutant::Matcher::Null do
let(:object) { described_class.new }
describe '#each' do
let(:yields) { [] }
subject { object.each { |entry| yields << entry } }
# it_should_behave_like 'an #each method'
context 'with no block' do
subject { object.each }
it { should be_instance_of(to_enum.class) }
it 'yields the expected values' do
expect(subject.to_a).to eql(object.to_a)
end
end
it 'should yield subjects' do
expect { subject }.not_to change { yields }.from([])
end
end
end