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システムスペックではvisit hoge_urlではなくvisit hoge_pathと書かないとNet::ReadTimeoutエラーが発生する

Posted at

発生した問題

Hello worldレベルのごく簡単なRailsアプリを作成し、rspec-railsをインストールして次のようなシステムスペックを書きました。

require 'rails_helper'

RSpec.describe "Home", type: :system do
  before do
    driven_by(:selenium_chrome_headless)
  end

  example do
    visit root_url
    expect(page).to have_content 'Home#index'
  end
end

テストを実行すると・・・あれ?

$ bundle exec rspec
DEBUGGER: Attaching after process 28722 fork to child process 28745

(何も起きない)

この状態が何十秒も続き、最終的には以下のエラーが出て終了しました。

$ bundle exec rspec
DEBUGGER: Attaching after process 28722 fork to child process 28745
F

Failures:

  1) Homes 
     Failure/Error: visit root_url
     
     Net::ReadTimeout:
       Net::ReadTimeout with #<Socket:(closed)>
     
     [Screenshot Image]: /Users/jnito/dev/sandbox/without-active-record/tmp/capybara/failures_r_spec_example_groups_homes_example_at___spec_system_homes_spec_rb_8_381.png

     
     # ./spec/system/homes_spec.rb:9:in `block (2 levels) in <top (required)>'

Finished in 1 minute 16.35 seconds (files took 0.5839 seconds to load)
1 example, 1 failure

Failed examples:

rspec ./spec/system/homes_spec.rb:8 # Homes 

ちなみにドライバを:rack_testに変えるとテストはパスします。

   before do
-    driven_by(:selenium_chrome_headless)
+    driven_by(:rack_test)
   end
$ bundle exec rspec
.

Finished in 0.06872 seconds (files took 0.63488 seconds to load)
1 example, 0 failures

はて????

解決方法

visit root_urlvisit root_pathに変えると直りました。たったこれだけ!!

   example do
-    visit root_url
+    visit root_path
     expect(page).to have_content 'Home#index'
   end
$ bundle exec rspec
DEBUGGER: Attaching after process 28608 fork to child process 28634
.

Finished in 1.44 seconds (files took 0.60104 seconds to load)
1 example, 0 failures

ちなみにデフォルトの状態ではroot_urlroot_pathはそれぞれ以下のような値になっていました。

puts root_url  #=> http://www.example.com/
puts root_path #=> /

これ、以前もハマった記憶があるんですが、すっかり忘れてまたハマってしまいました……😓
みなさんもお気を付けください。

確認したバージョン

  • ruby 3.1.2
  • rails 7.0.4
  • rspec-rails 6.0.0.rc1
  • capybara 3.37.1
  • selenium-webdriver 4.4.0
  • Chrome 105.0.5195.125
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