timdiggins/capybara_issue_2469.rb

## capybara_issue_2469.rb
require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  gem 'capybara'
  # gem 'capybara', path: "/Users/twalpole/projects/Capybara"
  gem 'puma'
  gem 'selenium-webdriver'
  gem 'webdrivers'
  gem 'byebug'
  gem 'rexml'
end

require 'selenium-webdriver'
require "capybara/dsl"

Capybara.default_max_wait_time = 5
html = DATA.read
app = proc { |env| [200, { "Content-Type" => "text/html" }, [html] ] }

Capybara.register_driver :selenium_chrome_headless do |app|
  options = Selenium::WebDriver::Chrome::Options.new
  options.add_argument("no-sandbox") # or setup user per https://github.com/GoogleChromeLabs/lighthousebot/blob/master/builder/Dockerfile#L35-L40
  options.add_argument("headless")
  options.add_argument("window-size=1280x1280")
  # options.add_argument("disable-gpu") #  only windows? still? https://developers.google.com/web/updates/2017/04/headless-chrome

  # comment out this line to fix it
  options.add_option("w3c", false)
  # FYI was doing this because of https://stackoverflow.com/questions/56522499/cromedriver-driver-manage-logs-getbrowser-fails-on-chromedriver-75-0-3770-8 but no longer needed

  capabilities = Selenium::WebDriver::Remote::Capabilities.chrome(
    # https://stackoverflow.com/questions/46278514/capture-browser-console-logs-with-capybara
    loggingPrefs: { browser: "ALL" }
  )

  service = Selenium::WebDriver::Service.chrome(
    args: {
      verbose: true,
      log_path: "./chromedriver.log"
    }
  )

  Capybara::Selenium::Driver.new(app, browser: :chrome, options: options, desired_capabilities: capabilities, service: service)
end

Capybara.register_driver :selenium_chrome do |app|
  options = Selenium::WebDriver::Chrome::Options.new

  [
    "window-size=1280x1280"
  ].each { |arg| options.add_argument(arg) }

  Capybara::Selenium::Driver.new(app, browser: :chrome, options: options)
end

%i[selenium_chrome selenium_chrome_headless].each do |driver|
  puts "Using #{driver}"
  sess = Capybara::Session.new(driver, app)
  sess.visit('/')
  sess.assert_selector(:field, 'sometextareaid', with: /\s*initial value\s*/)
  puts "working fine with #{driver}"
end
__END__

<!DOCTYPE html>
<html lang="en">
<head>
  <title>Hello!</title>
</head>
<body>
<textarea id="sometextareaid">
  initial value
</textarea>
</body>
</html>
	require 'bundler/inline'

	gemfile do
	source 'https://rubygems.org'
	gem 'capybara'
	# gem 'capybara', path: "/Users/twalpole/projects/Capybara"
	gem 'puma'
	gem 'selenium-webdriver'
	gem 'webdrivers'
	gem 'byebug'
	gem 'rexml'
	end

	require 'selenium-webdriver'
	require "capybara/dsl"

	Capybara.default_max_wait_time = 5
	html = DATA.read
	app = proc { \|env\| [200, { "Content-Type" => "text/html" }, [html] ] }

	Capybara.register_driver :selenium_chrome_headless do \|app\|
	options = Selenium::WebDriver::Chrome::Options.new
	options.add_argument("no-sandbox") # or setup user per https://github.com/GoogleChromeLabs/lighthousebot/blob/master/builder/Dockerfile#L35-L40
	options.add_argument("headless")
	options.add_argument("window-size=1280x1280")
	# options.add_argument("disable-gpu") # only windows? still? https://developers.google.com/web/updates/2017/04/headless-chrome

	# comment out this line to fix it
	options.add_option("w3c", false)
	# FYI was doing this because of https://stackoverflow.com/questions/56522499/cromedriver-driver-manage-logs-getbrowser-fails-on-chromedriver-75-0-3770-8 but no longer needed

	capabilities = Selenium::WebDriver::Remote::Capabilities.chrome(
	# https://stackoverflow.com/questions/46278514/capture-browser-console-logs-with-capybara
	loggingPrefs: { browser: "ALL" }
	)

	service = Selenium::WebDriver::Service.chrome(
	args: {
	verbose: true,
	log_path: "./chromedriver.log"
	}
	)

	Capybara::Selenium::Driver.new(app, browser: :chrome, options: options, desired_capabilities: capabilities, service: service)
	end

	Capybara.register_driver :selenium_chrome do \|app\|
	options = Selenium::WebDriver::Chrome::Options.new

	[
	"window-size=1280x1280"
	].each { \|arg\| options.add_argument(arg) }

	Capybara::Selenium::Driver.new(app, browser: :chrome, options: options)
	end

	%i[selenium_chrome selenium_chrome_headless].each do \|driver\|
	puts "Using #{driver}"
	sess = Capybara::Session.new(driver, app)
	sess.visit('/')
	sess.assert_selector(:field, 'sometextareaid', with: /\sinitial value\s/)
	puts "working fine with #{driver}"
	end
	__END__

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<title>Hello!</title>
	</head>
	<body>
	<textarea id="sometextareaid">
	initial value
	</textarea>
	</body>
	</html>