Add spec to make sure :before_fork hook is not called when the worker isn't going to fork.

Author: kjwierenga

test/worker_test.rb

@@ -450,6 +450,19 @@ def self.perform
     assert $BEFORE_FORK_CALLED == workerA.will_fork?
   end
 
+  it "Will not call a before_fork hook when the worker can't fork" do
+    Resque.redis.flushall
+    $BEFORE_FORK_CALLED = false
+    Resque.before_fork = Proc.new { $BEFORE_FORK_CALLED = true }
+    workerA = Resque::Worker.new(:jobs)
+    workerA.cant_fork = true
+
+    assert !$BEFORE_FORK_CALLED, "before_fork should not have been called before job runs"
+    Resque::Job.create(:jobs, SomeJob, 20, '/tmp')
+    workerA.work(0)
+    assert !$BEFORE_FORK_CALLED, "before_fork should not have been called after job runs"
+  end
+  
   it "Will not call a before_fork hook when the worker can't fork" do
     Resque.redis.flushall
     $BEFORE_FORK_CALLED = false