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

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# encoding: utf-8
require 'spec_helper'
describe Mutant::Matcher::Chain do
let(:object) { described_class.new(matchers) }
describe '#each' do
subject { object.each { |entry| yields << entry } }
let(:matchers) { [matcher_a, matcher_b] }
let(:matcher_a) { double('Matcher A') }
let(:matcher_b) { double('Matcher B') }
let(:subject_a) { double('Subject A') }
let(:subject_b) { double('Subject B') }
before do
matcher_a.stub(:each).and_yield(subject_a).and_return(matcher_a)
matcher_b.stub(:each).and_yield(subject_b).and_return(matcher_b)
end
# it_should_behave_like 'an #each method'
context 'with no block' do
subject { object.each }
it { should be_instance_of(to_enum.class) }
if defined?(RUBY_ENGINE) && RUBY_ENGINE == 'rbx'
pending 'FIX RBX rspec? BUG HERE'
else
it 'yields the expected values' do
subject.to_a.should eql(object.to_a)
end
end
end
let(:yields) { [] }
it 'should yield subjects' do
expect { subject }.to change { yields }.from([]).to([subject_a, subject_b])
end
end
describe '#matchers' do
subject { object.matchers }
let(:matchers) { double('Matchers') }
it { should be(matchers) }
it_should_behave_like 'an idempotent method'
end
end