how to use rspec stubbing to first raise, then return

test.rb

module Test
  def catcher
    begin
      pp Foo.bar
    rescue Exception
      pp "errored"
    end
  end
end

test_spec.rb

include Test
class Foo; end

describe "testing" do
  it "should work" do
    @counter = 0
    Foo.stub(:bar) do
      @counter += 1
      pp @counter
      raise Exception if @counter < 2
      "hello"
    end
    catcher
    catcher
  end
end