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module Concurrent
module Concern
RSpec.describe Observable do
let (:described_class) do
Class.new do
include Observable
public :observers, :observers=
end
end
let(:observer_set) { double(:observer_set) }
subject { described_class.new }
before(:each) do
subject.observers = observer_set
end
it 'does not initialize set by by default' do
expect(described_class.new.observers).to be_nil
end
it 'uses the given observer set' do
expected = Collection::CopyOnWriteObserverSet.new
subject.observers = expected
expect(subject.observers).to eql expected
end
it 'delegates #add_observer' do
expect(observer_set).to receive(:add_observer).with(:observer, :update) { |v| v }
expect(subject.add_observer(:observer)).to eq :observer
end
it 'delegates #with_observer' do
expect(observer_set).to receive(:add_observer).with(:observer, :update) { |v| v }
expect(subject.with_observer(:observer)).to eq subject
end
it 'delegates #delete_observer' do
expect(observer_set).to receive(:delete_observer).with(:observer)
subject.delete_observer(:observer)
end
it 'delegates #delete_observers' do
expect(observer_set).to receive(:delete_observers).with(no_args)
subject.delete_observers
end
it 'delegates #count_observers' do
expect(observer_set).to receive(:count_observers).with(no_args)
subject.count_observers
end
end
end
end
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