gistfile1.rb

class ExceptionWithParams < Exception

  attr_accessor :params

  def initialize(params)
    @params = params
  end

end

class TestExceptionTask < Queueable::Tasks

  def task_that_raises(arg)
     raise "Bad things."
  end

  def on_processing_exception(exception, request_params)
    raise ExceptionWithParams(request_params)
  end
end

describe "exception handling" do

  it "should pass request params when an exception is raised" do
    lambda {
      TestBackgroundTasks.send(:process, { :class => "TestExceptionTask", :action => "task_that_raises", :args => [123] })
    }.should_raise(ExceptionWithParams)
  end

end