class EventExpectr

Constants

VERSION

Attributes

expectr[R]

Expectr instance this class wraps

patterns[R]

hash of patterns mapping to code blocks to execute when they match

running[RW]

boolean value that keeps the run! method running. set to false to bail out.

Public Class Methods

new(cmd, args={}) click to toggle source

# File lib/event-expectr.rb, line 14
def initialize(cmd, args={})
  @timeout = args.delete(:timeout) || 30
  
  @expectr = Expectr.new(cmd, args)
  @expectr.timeout = 0.01

  @patterns = {}
end

Public Instance Methods

expect(pattern, &block) click to toggle source

# File lib/event-expectr.rb, line 23
def expect(pattern, &block)
  if not [String, Regexp].include? pattern.class
    raise TypeError, "Pattren class should be String or Regexp"
  end

  @patterns[pattern] = block
end

run!() click to toggle source

# File lib/event-expectr.rb, line 31
def run!
  if @patterns.count == 0
    raise RuntimeError, "No patterns have been defined yet, this would just look forever"
  end

  @running = true

  begin
    Timeout::timeout(@timeout) do
      while @running
        @patterns.each_pair do |pattern, block|
          match = @expectr.expect(pattern, true)
          if match
            # run the code provided with this pattern
            block.call(match)

            # remove it so we don't try to match again
            @patterns.delete(pattern)

            # the code block may have turned this off
            break unless @running
          end

          @running = false if @patterns.count == 0
        end

        sleep 0.1
      end
    end
  rescue Timeout::Error
    # haven't found all the matches in the time given.  oh well.
    return false
  end

  # this is an intentional end of the run process
  return true
end