timeout_method_test.rb

require "test/unit"
require "rubygems"
require "mocha"

class Bar
  def bar; end
end

def foo
  timer = Timer.start(60)
  result = Bar.bar
  timer.expired? ? "FAILED" : result
end

class Timer
  def self.start(seconds)
    timer = new(seconds)
    timer.start
  end
  def initialize(seconds)
    @seconds = seconds
  end
  def start
    @start_time = Time.now
  end
  def expired?
    Time.now - @start_time < @seconds
  end
end

class FooTest < Test::Unit::TestCase
  def test_returns_success_when_timer_not_expired
    Timer.stubs(:start).returns(stub("timer", :expired? => false))
    Bar.stubs(:bar).returns("SUCCESS")
    assert_equal "SUCCESS", foo
  end
  def test_returns_failed_when_timer_expired
    Timer.stubs(:start).returns(stub("timer", :expired? => true))
    Bar.stubs(:bar).returns("SUCCESS")
    assert_equal "FAILED", foo
  end
end

oh I realise I could work around it, but the timer class feels contrived for a single use case. I was just thinking that return taking a block provides a hook for convenient actions :)