Request specs fail after upgrading to Rack 3

[cjamison]

We have a number of request specs for our API and after upgrading Rack from 2.x to 3.x, they all started failing with:

     Failure/Error: get "/api/v1/products/1", headers: @headers
     
     NoMethodError:
       undefined method `read' for nil:NilClass

The way to resolve these errors is to convert the get request to

get "/api/v1/products/1", headers: @headers, env: { 'rack.input' => StringIO.new }

However, it seems very verbose to add this to each request. Am I missing an easier / better way to avoid this error?

This is on rspec-rails 7.1.0 and rspec-core 3.13.2.

[JonRowe]

👋 We don't include any behaviour for this ourselves and rely on the upstream Rails / rack-test helpers, is Rack 3 supported by Rails 8? I think 7 is still pinned to 2.x isn't it?

[cjamison]

No, Rails 7 is not pinned to 2.x. At least 7.1 is not which is what we are using.

I see what happened on our end. We have another gem using/requiring Sinatra and at least Sinatra 4.1.1 is requiring rack >= 3.0.0. So, that is what caused our jump. I will see if we want to continue as things are or downgrade Sinatra to something not requiring rack 3.

[JonRowe]

My mistake 7.0 is, but not anything later, what version of Rack are you on? It seems like 3.1 made "rack.input" fully optional?

[cjamison]

Bundle installed rack 3.1.8. In spite of "rack.input" being optional in this version, it still gave me the error message without me adding it into the test.

[bradgessler]

I'm running into similar issues; the request object isn't put into play.

terminalwire/server [main] → be rspec spec/requests/bash/installations_spec.rb
FF

Failures:

  1) Bash::Installations GET /index returns a successful response for terminalwire.sh root
     Failure/Error: request.format = :bash if request.user_agent.start_with? "curl" and not request.format.html?

     NoMethodError:
       undefined method `start_with?' for nil
     # ./app/controllers/application_controller.rb:13:in `assign_bash_format'
     # ./spec/requests/bash/installations_spec.rb:6:in `block (3 levels) in <top (required)>'

  2) Bash::Installations GET /index returns bash file contents
     Failure/Error: request.format = :bash if request.user_agent.start_with? "curl" and not request.format.html?

     NoMethodError:
       undefined method `start_with?' for nil
     # ./app/controllers/application_controller.rb:13:in `assign_bash_format'
     # ./spec/requests/bash/installations_spec.rb:6:in `block (3 levels) in <top (required)>'

Finished in 0.1009 seconds (files took 1.78 seconds to load)
2 examples, 2 failures

The specs:

require 'rails_helper'

RSpec.describe "Bash::Installations", type: :request do
  describe "GET /index" do
    before do
      get "/", headers: { "Host" => "terminalwire.sh" }
    end
    it "returns a successful response for terminalwire.sh root" do
      expect(response).to be_successful
      expect(response.body).to include("Detect operating system")
    end
    it "returns bash file contents" do
      expect(response.body).to include("Detect operating system")
    end
  end
end