Support Ruby 3.0

🐛 Bug Report

Selenium Firefox webdriver (both 3.x and 4.alpha) does not work with Ruby 3. There could be multiple causes, but the main one is that rexml is now a bundled gem

Test script or set of commands reproducing this issue

#!/usr/bin/env ruby

require 'bundler/inline'

gemfile(true) do
  source 'https://rubygems.org'

  gem 'selenium-webdriver'
end

require 'selenium/webdriver/firefox'

Expected behavior

Script ends without errors

Actual behavior

$ ./selenium.rb 
Fetching gem metadata from https://rubygems.org/......
Resolving dependencies...
Using bundler 2.2.3
Using rubyzip 2.3.0
Using childprocess 3.0.0
Using selenium-webdriver 3.142.7
~/.rvm/gems/ruby-3.0.0/gems/selenium-webdriver-3.142.7/lib/selenium/webdriver/firefox.rb:22:in `require': cannot load such file -- rexml/document (LoadError)
	from ~/.rvm/gems/ruby-3.0.0/gems/selenium-webdriver-3.142.7/lib/selenium/webdriver/firefox.rb:22:in `<top (required)>'
	from selenium.rb:9:in `require'
	from selenium.rb:9:in `<main>'

Environment

OS: macOS 10.15.7 (19H114) Browser: n/a Browser version: n/a Browser Driver version: n/a Language Bindings version: Ruby 3.0 Selenium Grid version (if applicable): n/a

[jrobersonaquent]

I monkey patched Selenium::WebDriver::Remote::Bridge and it fixed the double-splat issue for us:

module Selenium
  module WebDriver
    module Remote
      class Bridge
        class << self
          alias_method :original_handshake, :handshake

          def handshake(opts = {})
            original_handshake(**opts)
          end
        end
      end
    end
  end
end

[titusfortner]

This is now fixed in trunk, and I’m not doing another 3.x release as discussed in #9002