select_for_test (Net::SSH::Test::Extensions::IO::ClassMethods)

         # File lib/net/ssh/test/extensions.rb, line 127
    127:         def select_for_test(readers=nil, writers=nil, errors=nil, wait=nil)
    128:           ready_readers = Array(readers).select { |r| r.select_for_read? }
    129:           ready_writers = Array(writers).select { |r| r.select_for_write? }
    130:           ready_errors  = Array(errors).select  { |r| r.select_for_error? }
    131:
    132:           if ready_readers.any? || ready_writers.any? || ready_errors.any?
    133:             return [ready_readers, ready_writers, ready_errors]
    134:           end
    135:
    136:           processed = 0
    137:           Array(readers).each do |reader|
    138:             processed += 1 if reader.idle!
    139:           end
    140:
    141:           raise "no readers were ready for reading, and none had any incoming packets" if processed == 0
    142:         end