NoMethodError: undefined method `strings' for Puma::Events:Class-CodePudding

I'm running a pretty simple test, which requires javascript, just to check the index loads and an element is there, something like:

class ProfitsTest < ApplicationSystemTestCase
  setup do
    @admin = users(:admin)
    @admin.confirm
    sign_in @admin
  end

  test 'visiting the index' do
    # Index only test
    visit profits_url
    assert_selector 'h1', text: '計算表'
  end
end

My config for capybara looks like this (just getting rid of Puma boot logs):

require 'test_helper'

class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
  driven_by :selenium, using: :headless_chrome # :chrome
  Capybara.server = :puma, { Silent: true }
  Selenium::WebDriver.logger.ignore(:browser_options)
end

And here's the error I'm getting:

#<Thread:0x000000010f82b2d8 /Users/cody/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/capybara-3.37.1/lib/capybara/server.rb:76 run> terminated with exception (report_on_exception is true):
/Users/cody/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/capybara-3.37.1/lib/capybara/registrations/servers.rb:32:in `block in <main>': undefined method `strings' for Puma::Events:Class (NoMethodError)

  events = conf.options[:Silent] ? ::Puma::Events.strings : ::Puma::Events.stdio
                                                 ^^^^^^^^
    from /Users/cody/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/capybara-3.37.1/lib/capybara/config.rb:64:in `block in server='
    from /Users/cody/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/capybara-3.37.1/lib/capybara/server.rb:77:in `block in boot'
E

Error:
ProfitsTest#test_visiting_the_index:
NoMethodError: undefined method `strings' for Puma::Events:Class
    /Users/cody/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/capybara-3.37.1/lib/capybara/registrations/servers.rb:32:in `block in <main>'
    /Users/cody/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/capybara-3.37.1/lib/capybara/config.rb:64:in `block in server='
    /Users/cody/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/capybara-3.37.1/lib/capybara/server.rb:77:in `block in boot'

Error:
ProfitsTest#test_visiting_the_index:
NoMethodError: undefined method `strings' for Puma::Events:Class
    /Users/cody/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/capybara-3.37.1/lib/capybara/registrations/servers.rb:32:in `block in <main>'
    /Users/cody/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/capybara-3.37.1/lib/capybara/config.rb:64:in `block in server='
    /Users/cody/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/capybara-3.37.1/lib/capybara/server.rb:77:in `block in boot'


rails test test/system/profits_test.rb:20

I guess I've got an error to debug but the logger isn't working? If I change Silent: true to Silent: False, it gives me the same No Method Error for stdio. So something must be wrong with Puma? I'm using rails (6.1.7), puma (6.0.0) and capybara (3.37.1).

I'm stumped.

CodePudding user response：

The released version of Capybara doesn’t support Puma 6. You can use the master branch of Capybara, use Puma 5.x, or write your own server registration config.

CodePudding user response：

I have same problem, just temporary downgrade Puma to version 5.x at the moment. If you also use capistrano3-puma, downgrade it to 5.x either.