Trouble testing for an error thrown from AASM gem

I'm having trouble testing for a thrown AASM error.

Here is my controller method:

# controllers/jobs_controller.rb
def change_state
  respond_to do |format|
    if @job.close && @job.save
      format.html { redirect_to @job, notice: 'Job has been closed.' }
      format.json { render :show, status: :ok, location: @job }
    else
      format.html { render :show, notice: 'Job could not be closed.' }
      format.json { render json: @job.errors, status: :unprocessable_entity }
    end
  end
end

My spec looks like this:

# spec/controllers/jobs_controller_spec.rb
describe "POST #change_state" do
  it "cannot transition job from closed" do
    job.aasm_state = "closed"
    job.save!
    post :change_state, params: {id: job.hash_id, user_id: user.id}
    expect { response }.to raise_error(AASM::InvalidTransition)
  end
end

The test fails (with the expected/desired failure):

Failure/Error: if @job.close && @job.save     
AASM::InvalidTransition:Event 'close' cannot transition from 'closed'.

I'm just unable to figure out the right syntax to pass the test. I've tried a few variations of the expect line but can't seem to piece it together.

Any guidance is appreciated.

The exception is happening before the expect statement. Try it:

expect {
  post(:change_state, params: { id: job.hash_id, user_id: user.id })
}.to(
  raise_error(AASM::InvalidTransition)
)