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Selenium::WebDriver::Error::StaleElementReferenceError

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#開発環境

・Ruby: 2.6.3
・Rails: 6.0.3


#Selenium::WebDriver::Error::StaleElementReferenceError
system specのテスト時に以下のエラーが出ました。


Selenium::WebDriver::Error::StaleElementReferenceError:
       stale element reference: element is not attached to the page document
         (Session info: chrome=83.0.4103.116)

#ドキュメント

A command failed because the referenced element is no longer attached to the DOM.

訳:参照された要素がDOMにアタッチされなくなったため、コマンドが失敗しました。

#エラーが起きたテストをみてみる

spec/system/users_spec.rb
#ログイン成功を確認するテスト
it 'is success that Creating new user with E-mail' do
      visit login_path
      fill_in 'E-mail', with: user.email, match: :first
      fill_in 'Password', with: 'suzuki1234'
      within '.login-form' do
      click_button 'Log in'
      expect(page).to have_content 'login success'
      expect(current_path).to eq user_path(user.id)
      end
    end

#結論

spec/system/users_spec.rb
    within '.login-form' do
      click_button 'Log in'
      expect(page).to have_content 'login success'
      expect(current_path).to eq user_path(user.id)
      end

に問題があった。
view内に、Log inというテキストが二箇所あるので、範囲指定をするためにwithinを使っていたが、endの位置が悪かったみたい。

#修正版

spec/system/users_spec.rb
it 'is success that Creating new user with E-mail' do
      visit login_path
      fill_in 'E-mail', with: user.email, match: :first
      fill_in 'Password', with: 'suzuki1234'
      within '.login-form' do
      click_button 'Log in'
      #ここにend
      end
      expect(page).to have_content 'login success'
      expect(current_path).to eq user_path(user.id)
    end

endの位置が悪かった。ごめんなさい...

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