对AASM gem

Question

我无法测试抛出的AASM错误。

这是我的控制器方法：

# 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

我的规格如下：

# 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

测试失败（预期/期望的失败）：

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

我只是无法找出通过测试的正确语法。我尝试了expect行的一些变体，但似乎无法将它拼凑在一起。

感谢任何指导。

Answer 1

异常发生在expect语句之前。试试吧：

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