$ env RUBYLIB=$(pwd)/lib:$(pwd)/ext/bson/ rspec

An error occurred while loading ./spec/bson/array_spec.rb.
Failure/Error:
  class AlternateIO < StringIO
  
    # Read a byte from the stream.
    #
    # @returns [ String ] A String representation of the next byte.
    def readbyte
      super.chr
    end

NameError:
  uninitialized constant StringIO
# ./spec/spec_helper.rb:68:in '<top (required)>'
# ./spec/bson/array_spec.rb:16:in '<top (required)>'


Finished in 0.00055 seconds (files took 2.75 seconds to load)
0 examples, 0 failures, 1 error occurred outside of examples