无法使请求的规范生效：＃的未定义方法“调用”

Question

I'm trying make the specs work on a project. There was a setup for specs but was not maintain.

I have a simple post for a request spec

require 'rails_helper'

RSpec.describe 'Cars API', type: :request do
  let(:organization) { Fabricate(:organization, owner: user) }
  let(:app)          { Fabricate(:app, organization: organization, owner: user) }
  let(:user)         { Fabricate(:user) }

  before do
    #login_api(user)
  end

  describe 'create' do
    describe 'car type' do
      it 'should create a car of type CarType1' do
        expect(Car.count).to eql(0)
        id = '123'
        post("/api/1/organization/#{id}/cars")
        expect(Car.count).to eql(1)

        car = Car.first

        expect(car.type).to eql(Car::CarType1)
      end
    end
  end
end

And I get

#<NoMethodError: undefined method `call' for #<App:0x007fee64557080>>

I've tried to debug the issue but with no luck. The issue happens at the line post("/api/1/organization/#{id}/cars") . Where might the problem be ?

Answer 1

I had such problem ;) (and spent several hours for debugging sources)

Try to rename app to ap or similar variable.

# "bad" name
let(:app)          { ... }

# "better" name
let(:ap)          { ... }
# or 
let(:my_app)      { ... }

As I understood the problem in variable name when RSpec initializes your lazy block let . Not sure but I think at that moment App has already initialized and RSpec send method call not to block from let but to another object.

Note: you can use before block and use instance variable @app

Answer 2

This issue is occuring because you are overriding the Rails app variable. Rename the variable to something else. It will work.

By default in rails, app variable is your Rails application which has call method that will be invoked whenever your application receives any request from Rack middleware.