describe KnapsackPro::LoggerWrapper do let(:io) { StringIO.new } let(:logger) { ::Logger.new(io) } let(:logger_wrapper) { described_class.new(logger) } subject { io.string } [:debug, :info, :warn, :error, :fatal].each do |log_level| describe "##{log_level}" do before { logger_wrapper.public_send(log_level, 'Test message') } it { should include "[knapsack_pro] Test message\n" } end end end