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Contents
# encoding: utf-8
shared_examples 'a safe Deferrable' do
let(:logger) { instance_double('Logger') }
let(:arguments) { [random_str] }
let(:errback_calls) { [] }
let(:success_calls) { [] }
let(:exception) { StandardError.new("Intentional error") }
before do
allow(subject).to receive(:logger).and_return(logger)
end
context '#errback' do
it 'adds a callback that is called when #fail is called' do
subject.errback do |*args|
expect(args).to eql(arguments)
end
subject.fail *arguments
end
it 'catches exceptions in the callback and logs the error to the logger' do
expect(subject.send(:logger)).to receive(:error).with(/#{exception.message}/)
subject.errback do
raise exception
end
subject.fail
end
end
context '#fail' do
it 'calls the callbacks defined with #errback, but not the ones added for success #callback' do
3.times do
subject.errback { errback_calls << true }
subject.callback { success_calls << true }
end
subject.fail *arguments
expect(errback_calls.count).to eql(3)
expect(success_calls.count).to eql(0)
end
end
context '#callback' do
it 'adds a callback that is called when #succed is called' do
subject.callback do |*args|
expect(args).to eql(arguments)
end
subject.succeed *arguments
end
it 'catches exceptions in the callback and logs the error to the logger' do
expect(subject.send(:logger)).to receive(:error).with(/#{exception.message}/)
subject.callback do
raise exception
end
subject.succeed
end
end
context '#succeed' do
it 'calls the callbacks defined with #callback, but not the ones added for #errback' do
3.times do
subject.errback { errback_calls << true }
subject.callback { success_calls << true }
end
subject.succeed *arguments
expect(success_calls.count).to eql(3)
expect(errback_calls.count).to eql(0)
end
end
end
Version data entries
17 entries across 17 versions & 2 rubygems