Simple BDD API for testing asynchronous Ruby/EventMachine code (c) 2008 Aman Gupta (tmm1)

em-spec can be used with either bacon, test unit or rspec.

=Rspec There are two ways to use the Rspec extension. To use it as a helper, include EM::SpecHelper in your describe block. You then use the em method to wrap your evented test code. Inside the em block, you must call #done after your expectations. Everything works normally otherwise.

require "em-spec/rspec"
describe EventMachine do
include EM::SpecHelper

it "works normally when not using #em" do
  1.should == 1
end

it "makes testing evented code easy with #em" do
  em do
    start = Time.now

    EM.add_timer(0.5){
      (Time.now-start).should be_close( 0.5, 0.1 )
      done
    }
  end
end
end

The other option is to include EM::Spec in your describe block. This will patch Rspec so that all of your examples run inside an em block automatically:

require "em-spec/rspec"
describe EventMachine do
include EM::Spec

it "requires a call to #done every time" do
  1.should == 1
  done
end

it "runs test code in an em block automatically" do
  start = Time.now

  EM.add_timer(0.5){
    (Time.now-start).should be_close( 0.5, 0.1 )
    done
  }
end
end

=Bacon The API is identical to Bacon, except that you must explicitly call 'done' after all the current behavior's assertions have been made:

require 'em-spec/bacon'

EM.describe EventMachine do

should 'have timers' do
  start = Time.now

  EM.add_timer(0.5){
    (Time.now-start).should.be.close 0.5, 0.1
    done
  }
end

should 'have periodic timers' do
  num = 0
  start = Time.now

  timer = EM.add_periodic_timer(0.5){
    if (num += 1) == 2
      (Time.now-start).should.be.close 1.0, 0.1
      EM.__send__ :cancel_timer, timer
      done
    end
  }
end

end

=Test::Unit There are two ways to use the Test::Unit extension. To use it as a helper, include EM::TestHelper in your test unit class. You then use the em method to wrap your evented test code. Inside the em block, you must call #done after your expectations. Everything works normally otherwise.

class EmSpecHelperTest < Test::Unit::TestCase

include EventMachine::TestHelper

def test_trivial
  em do
    assert_equal 1, 1
    done
  end
end
end

The other option is to include EM::Test in your test class. This will patch Test::Unit so that all of your examples run inside an em block automatically:

class EmSpecTest < Test::Unit::TestCase

include EventMachine::Test

def test_timer
  start = Time.now

  EM.add_timer(0.5){
    assert_in_delta 0.5, Time.now-start, 0.1
    done
  }
end
end

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