Rspec 测试没有路由匹配 ActionController::UrlGenerationError

Question

我正在尝试对 Rspec 和 Controller 测试，更具体地说是 JSON 请求。在这种情况下，我正在尝试使用v1_devices_path 路线：

routes.rb

v1_device_scans POST   /v1/devices/:device_serial_number/scans(.:format) v1/scans#create
v1_device       GET    /v1/devices/:serial_number(.:format)              v1/devices#show
                PATCH  /v1/devices/:serial_number(.:format)              v1/devices#update
                PUT    /v1/devices/:serial_number(.:format)              v1/devices#update

还有我的控制器：

controllers/v1/devices_controller.rb

class V1::DevicesController < ApplicationController
  before_action :set_device, only: [:show, :update]
  respond_to :json

  def show
    @device = Device.find_by(serial_number: params[:serial_number])
    render :json => @device.as_json
  end

  def update
    if @device.update(device_params)
      render json: @device, status: :ok, location: @device
    else
      render json: @device.errors, status: :unprocessable_entity
    end
  end

  private

  def set_device
    @device = Device.find_by!(serial_number: params[:serial_number])
  end

  def device_params
    params.require(:device).permit(
      :serial_number,
      :name,
      :diagnostic_checkin_status,
      :diagnostic_dns,
      :diagnostic_ping,
      :assigned_internal_ip,
      :assigned_external_ip,
      :assigned_gateway_ip,
      :version,
      :timezone,
      :task_id,
      :scan_status,
      :scan_progress
    )
  end

end

到目前为止，我的测试非常简单......只是想确保我得到一些结果：

spec/controllers/v1/devices_controller_spec.rb

需要'rails_helper'

RSpec.describe V1::DevicesController, type: :controller do

  it "shows device info" do
    device = FactoryGirl.create(:device)
    get v1_device_path(device.serial_number), :format => :json
    expect(response.status).to be(200)
  end
end

经过一些调整，我的 url 看起来创建正确，但我仍然收到 no route matches 错误：

  1) V1::DevicesController shows device info
     Failure/Error: get v1_device_path(device.serial_number), :format => :json

     ActionController::UrlGenerationError:
       No route matches {:action=>"/v1/devices/41442305171c430ab253ba1ad95c5c61", :controller=>"v1/devices", :format=>:json}
     # /usr/local/bundle/gems/rails-controller-testing-1.0.2/lib/rails/controller/testing/template_assertions.rb:61:in `process'
     # /usr/local/bundle/gems/devise-4.3.0/lib/devise/test/controller_helpers.rb:33:in `block in process'
     # /usr/local/bundle/gems/devise-4.3.0/lib/devise/test/controller_helpers.rb:100:in `catch'
     # /usr/local/bundle/gems/devise-4.3.0/lib/devise/test/controller_helpers.rb:100:in `_catch_warden'
     # /usr/local/bundle/gems/devise-4.3.0/lib/devise/test/controller_helpers.rb:33:in `process'
     # /usr/local/bundle/gems/rails-controller-testing-1.0.2/lib/rails/controller/testing/integration.rb:12:in `block (2 levels) in <module:Integration>'
     # ./spec/controllers/v1/devices_controller_spec.rb:11:in `block (2 levels) in <top (required)>'

我做错了什么？

Answer 1

这是不将type 更改为request 的另一种解决方案。由于在show 设计路由中添加了serial_number 参数而显示此错误，您可以在get url 中添加serial_number。

RSpec.describe V1::DevicesController, type: :controller do

  it "shows device info" do
    device = FactoryGirl.create(:device)
    get :show, params: { serial_number: device.serial_number }, :format => :json
    expect(response.status).to be(200)
  end
end

希望对你有所帮助。

Answer 2

好的，从@sebastián 的评论开始，我将规范更改为：

require 'rails_helper'

RSpec.describe V1::DevicesController, type: :request do

  it "shows device info" do
    headers = {
      "ACCEPT" => "application/json",     # This is what Rails 4 accepts
    }

    device = FactoryGirl.create(:device)
    get v1_device_path(device.serial_number), :headers => headers
    expect(response.content_type).to eq("application/json")
  end
end

我的测试现在通过了。