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# frozen_string_literal: true
require_relative "user_interaction"
##
# This Gem::StreamUI subclass records input and output to StringIO for
# retrieval during tests.
class Gem::MockGemUi < Gem::StreamUI
  ##
  # Raised when you haven't provided enough input to your MockGemUi
  class InputEOFError < RuntimeError
    def initialize(question)
      super "Out of input for MockGemUi on #{question.inspect}"
    end
  end
  class TermError < RuntimeError
    attr_reader :exit_code
    def initialize(exit_code)
      super
      @exit_code = exit_code
    end
  end
  class SystemExitException < RuntimeError; end
  module TTY
    attr_accessor :tty
    def tty?()
      @tty = true unless defined?(@tty)
      @tty
    end
    def noecho
      yield self
    end
  end
  def initialize(input = "")
    require "stringio"
    ins = StringIO.new input
    outs = StringIO.new
    errs = StringIO.new
    ins.extend TTY
    outs.extend TTY
    errs.extend TTY
    super ins, outs, errs, true
    @terminated = false
  end
  def ask(question)
    raise InputEOFError, question if @ins.eof?
    super
  end
  def input
    @ins.string
  end
  def output
    @outs.string
  end
  def error
    @errs.string
  end
  def terminated?
    @terminated
  end
  def terminate_interaction(status=0)
    @terminated = true
    raise TermError, status if status != 0
    raise SystemExitException
  end
end