free_mutant/spec/unit/mutant/matcher/null_spec.rb

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2014-07-06 10:34:32 -04:00
require 'spec_helper'
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