CODEWITHSUNDEEP
rubysocketsrspecmocking
Nick Acker
Nick Acker

Reputation: 125

Mock TCPSocket with RSpec

I'm attempting to write tests around an application that makes heavy use of TCPSockets (an IRC bot to be specific). While writing my first class's tests, I had been skimping by with doing:

#In the describe block
before(:all) { TCPServer.new 6667 }

...which allowed for my TCPSockets to function (by connecting to localhost:6667), though they are not actually being properly mocked. However, this has now caused problems when moving onto my second class as I cannot create a TCPServer on the same port.

How can I mock the TCPSocket class in such a way that will allow me to test things such as its(:socket) { should be_kind_of(TCPSocket) } and other common operations like #readline and #write?

Upvotes: 2

Views: 1816

Answers (2)

era86
era86

Reputation: 101

You could try keeping track and closing the TCPServer in your before and after:

before do
  @server = TCPServer.new 6667
end

after do
  @server.close
end

it ... do
end

it ... do
end

After each of the individual tests, the TCPServer is killed so you can create a new one with the same port.

Upvotes: 3

Ch4rAss
Ch4rAss

Reputation: 754

I'm not quite sure if I understand your problem, but why don't you just install some kind irc server on your local machine? ircd-irc2, ircd-hybrid or something like that?

Suppose you have irc client implemented this way:

class Bot
  attr_accessor :socket
  def initialize
    socket = TCPSocket.new("localhost", 6667)
  end
end

You can then test it like this

let(:bot) { Bot.new }

it "should be kind of TCP Socket"
  bot.should be_kind_of(TCPSocket)
  bot.should be_a(TCPSocket)
end

Upvotes: 0

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