class Byebug::TestInterface

def clear
  @input, @output, @error = [], [], []
  history.clear
end

def errmsg(message)
  error.concat(message.to_s.split("\n"))
end

def initialize
  super()
  @input, @output, @error = [], [], []
end

def inspect
  [
    'Input:', input.join("\n"),
    'Output:', output.join("\n"),
    'Error:', error.join("\n")
  ].join("\n")
end

def print(message)
  output.concat(message.to_s.split("\n"))
end

def puts(message)
  output.concat(message.to_s.split("\n"))
end

def read_command(prompt)
  cmd = super(prompt)
  return cmd unless cmd.nil? && test_block
  test_block.call
  self.test_block = nil
end

def readline(prompt)
  puts(prompt)
  cmd = input.shift
  cmd.is_a?(Proc) ? cmd.call : cmd
end