How to use add_preference method of Selenium.WebDriver.Chrome Package

Best Selenium code snippet using Selenium.WebDriver.Chrome.add_preference

driver_test.rb

Source: driver_test.rb Github

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...46 test "define extra capabilities using chrome" do47 driver = ActionDispatch::SystemTesting::Driver.new(:selenium, screen_size: [1400, 1400], using: :chrome) do |option|48 option.add_argument("start-maximized")49 option.add_emulation(device_name: "iphone 6")50 option.add_preference(:detach, true)51 end52 driver.use53 browser_options = driver.__send__(:browser_options)54 expected = {55 "goog:chromeOptions" => {56 "args" => ["start-maximized"],57 "mobileEmulation" => { "deviceName" => "iphone 6" },58 "prefs" => { "detach" => true }59 },60 "browserName" => "chrome"61 }62 assert_equal expected, browser_options[:options].as_json63 end64 test "define extra capabilities using headless_chrome" do65 driver = ActionDispatch::SystemTesting::Driver.new(:selenium, screen_size: [1400, 1400], using: :headless_chrome) do |option|66 option.add_argument("start-maximized")67 option.add_emulation(device_name: "iphone 6")68 option.add_preference(:detach, true)69 end70 driver.use71 browser_options = driver.__send__(:browser_options)72 expected = {73 "goog:chromeOptions" => {74 "args" => ["--headless", "start-maximized"],75 "mobileEmulation" => { "deviceName" => "iphone 6" },76 "prefs" => { "detach" => true }77 },78 "browserName" => "chrome"79 }80 assert_equal expected, browser_options[:options].as_json81 end82 test "define extra capabilities using firefox" do83 driver = ActionDispatch::SystemTesting::Driver.new(:selenium, screen_size: [1400, 1400], using: :firefox) do |option|84 option.add_preference("browser.startup.homepage", "http:/​/​www.seleniumhq.com/​")85 option.add_argument("--host=127.0.0.1")86 end87 driver.use88 browser_options = driver.__send__(:browser_options)89 expected = {90 "moz:firefoxOptions" => {91 "args" => ["--host=127.0.0.1"],92 "prefs" => { "browser.startup.homepage" => "http:/​/​www.seleniumhq.com/​" }93 },94 "browserName" => "firefox"95 }96 assert_equal expected, browser_options[:options].as_json97 end98 test "define extra capabilities using headless_firefox" do99 driver = ActionDispatch::SystemTesting::Driver.new(:selenium, screen_size: [1400, 1400], using: :headless_firefox) do |option|100 option.add_preference("browser.startup.homepage", "http:/​/​www.seleniumhq.com/​")101 option.add_argument("--host=127.0.0.1")102 end103 driver.use104 browser_options = driver.__send__(:browser_options)105 expected = {106 "moz:firefoxOptions" => {107 "args" => ["-headless", "--host=127.0.0.1"],108 "prefs" => { "browser.startup.homepage" => "http:/​/​www.seleniumhq.com/​" }109 },110 "browserName" => "firefox"111 }112 assert_equal expected, browser_options[:options].as_json113 end114 test "does not define extra capabilities" do...

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driver.rb

Source: driver.rb Github

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...80 options.add_option(:detach, opts.delete(:detach))81 end82 prefs = opts.delete(:prefs)83 if prefs84 WebDriver.logger.deprecate ':prefs', 'Selenium::WebDriver::Chrome::Options#add_preference'85 prefs.each do |key, value|86 options.add_preference(key, value)87 end88 end89 options = options.as_json90 caps.merge!(options) unless options[Options::KEY].empty?91 if opts.key?(:proxy) || opts.key?('proxy')92 WebDriver.logger.deprecate 'Selenium::WebDriver::Chrome::Driver#new with `:proxy` parameter',93 'Selenium::WebDriver::Chrome::Capabilities#proxy='94 caps[:proxy] = opts.delete(:proxy) if opts.key?(:proxy)95 caps[:proxy] ||= opts.delete('proxy') if opts.key?('proxy')96 end97 caps98 end99 end # Driver100 end # Chrome...

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webdriver_run.rb

Source: webdriver_run.rb Github

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...42 end43 elsif %i[firefox firefox_headless].include? TestBench.browser44 Webdrivers::Geckodriver.update45 options = Selenium::WebDriver::Firefox::Options.new46 options.add_preference("download.prompt_for_download", false)47 options.add_preference("profile.content_settings.exceptions.automatic_downloads.*.setting", 1)48 options.add_preference("profile.content_settings.popups", 0)49 options.add_preference("browser.download.dir", DownloadHelper.path)50 options.add_preference("browser.download.folderList", 2)51 options.add_preference("browser.helperApps.neverAsk.saveToDisk", "text/​csv,text/​tsv,application/​pdf,application/​doc,application/​docx,image/​jpeg,application/​octet-stream doc xls pdf txt")52 # profile.native_events = true53 if TestBench.browser == :firefox54 puts "Using Firefox"55 else56 puts "Using Firefox Headless"57 options.headless!58 end59 Capybara::Selenium::Driver.new(60 app,61 browser: :firefox,62 http_client: client,63 options: options,64 )65 end...

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capybara.rb

Source: capybara.rb Github

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...14 Dir.mkdir cache_directory15end16Capybara.register_driver(:parallel_sniffybara) do |app|17 chrome_options = ::Selenium::WebDriver::Chrome::Options.new18 chrome_options.add_preference(:download,19 prompt_for_download: false,20 default_directory: download_directory)21 chrome_options.add_preference(:browser,22 disk_cache_dir: cache_directory)23 options = {24 service: ::Selenium::WebDriver::Service.chrome(args: { port: 51_674 }),25 browser: :chrome,26 options: chrome_options27 }28 Sniffybara::Driver.register_specialization(29 :chrome, Capybara::Selenium::Driver::ChromeDriver30 )31 Sniffybara::Driver.current_driver = Sniffybara::Driver.new(app, options)32end33Capybara.register_driver(:sniffybara_headless) do |app|34 chrome_options = ::Selenium::WebDriver::Chrome::Options.new35 chrome_options.add_preference(:download,36 prompt_for_download: false,37 default_directory: download_directory)38 chrome_options.add_preference(:browser,39 disk_cache_dir: cache_directory)40 chrome_options.args << "--headless"41 chrome_options.args << "--disable-gpu"42 chrome_options.args << "--window-size=1200,1200"43 options = {44 service: ::Selenium::WebDriver::Service.chrome(args: { port: 51_674 }),45 browser: :chrome,46 options: chrome_options47 }48 Sniffybara::Driver.register_specialization(49 :chrome, Capybara::Selenium::Driver::ChromeDriver50 )51 Sniffybara::Driver.current_driver = Sniffybara::Driver.new(app, options)52end...

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portal_env.rb

Source: portal_env.rb Github

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...43 # options = Selenium::WebDriver::Ie::Options.new44 # options = Selenium::WebDriver::Edge::Options.new45 # options = Selenium::WebDriver::Safari::Options.new46 # options.add_argument('--headless') # configure the driver to run in headless mode47 options.add_preference('profile.managed_default_content_settings.notifications', 1)48 options.add_preference('profile.managed_default_content_settings.cookies', 1)49 options.add_preference('profile.managed_default_content_settings.plugins', 1)50 options.add_preference('profile.managed_default_content_settings.geolocation', 1)51 options.add_preference('profile.managed_default_content_settings.images', 1)52 options.add_preference('profile.managed_default_content_settings.media_stream', 1)53 options.add_preference('profile.managed_default_content_settings.popups', 1)54 $web_driver = Selenium::WebDriver.for :chrome, options: options55 #$web_driver = Selenium::WebDriver.for :firefox, options: options, prefs: preferences56 # $web_driver = Selenium::WebDriver.for :ie, options: options, prefs: preferences57 # $web_driver = Selenium::WebDriver.for :edge, options: options, prefs: preferences58 # $web_driver = Selenium::WebDriver.for :safari, options: options, prefs: preferences59 $web_driver.manage.timeouts.page_load = 36060 $web_driver.manage.window.maximize61 Selenium::WebDriver::Wait.new(timeout: 10)62 $web_driver.manage.timeouts.implicit_wait = 1063 $web_driver.navigate.to "https:/​/​#{ENV['HOST']}.hi.guru/​"64 $web_driver.navigate.to "https:/​/​google.com/​"65end...

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capybara_selenium.rb

Source: capybara_selenium.rb Github

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...9 chromeOptions: { args: %w[disable-gpu disable-setuid-sandbox window-size=7680,4320] }10 )11 browser_options = ::Selenium::WebDriver::Chrome::Options.new12 browser_options.args << "--disable-gpu"13 browser_options.add_preference(:download,14 prompt_for_download: false,15 default_directory: default_directory)16 browser_options.add_preference(:browser, set_download_behavior: { behavior: 'allow' })17 http_client = Selenium::WebDriver::Remote::Http::Default.new18 http_client.read_timeout = 12019 http_client.open_timeout = 12020 Capybara::Selenium::Driver.new(app,21 browser: :chrome,22 desired_capabilities: capabilities,23 http_client: http_client,24 options: browser_options)25end26Capybara.javascript_driver = :selenium_chrome27Capybara.default_max_wait_time = 1528Capybara.register_driver(:selenium_chrome_headless) do |app|29 capabilities = Selenium::WebDriver::Remote::Capabilities.chrome(30 chromeOptions: { args: %w[headless disable-gpu disable-setuid-sandbox window-size=7680,4320] }31 )32 browser_options = ::Selenium::WebDriver::Chrome::Options.new33 browser_options.args << "--headless"34 browser_options.args << "--disable-gpu"35 browser_options.add_preference(:download,36 prompt_for_download: false,37 default_directory: default_directory)38 browser_options.add_preference(:browser, set_download_behavior: { behavior: 'allow' })39 http_client = Selenium::WebDriver::Remote::Http::Default.new40 http_client.read_timeout = 12041 http_client.open_timeout = 12042 Capybara::Selenium::Driver.new(app,43 browser: :chrome,44 desired_capabilities: capabilities,45 http_client: http_client,46 options: browser_options)47end48Capybara.javascript_driver = :selenium_chrome_headless49Capybara.default_max_wait_time = 15...

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env.rb

Source: env.rb Github

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...26puts "Browser : #{browser}"27Capybara.register_driver :firefox do |app|28 profile = Selenium::WebDriver::Firefox::Profile.new29 options = Selenium::WebDriver::Firefox::Options.new30 options.add_preference 'dom.webdriver.enabled', false31 options.add_preference 'dom.webnotifications.enabled', false32 options.add_preference 'dom.push.enabled', false33 options.profile = profile34 client = Selenium::WebDriver::Remote::Http::Default.new35 client.open_timeout = wait_time36 client.read_timeout = wait_time37 Capybara::Selenium::Driver.new(38 app,39 browser: :firefox,40 options: options,41 http_client: client42 )43end44Capybara.register_driver :chrome do |app|45 options = Selenium::WebDriver::Chrome::Options.new46 options.add_argument('--no-sandbox')...

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add_preference

Using AI Code Generation

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1driver.add_preference(:download, prompt_for_download: false, directory_upgrade: true, default_directory: 'C:\Users\Downloads')2driver.find_element(:link, '5.141.59').click3preferences = { download: { prompt_for_download: false, directory_upgrade: true, default_directory: 'C:\Users\Downloads' } }4capabilities['chromeOptions'] = { prefs: preferences }5driver.find_element(:link, '3.141.59').click6driver.add_preference(:download, prompt_for_download: false, directory_upgrade: true, default_directory: Dir.pwd)7preferences = { download: { prompt_for_download: false, directory_upgrade: true, default_directory: Dir.pwd } }8capabilities['chromeOptions'] = { prefs: preferences }9driver.find_element(:link, '3.141.59').click10driver.add_preference(:download, prompt_for_download: false, directory_upgrade: true, default_directory: File.expand_path('..', Dir.pwd))11preferences = { download: { prompt_for_download: false, directory_upgrade: true, default_directory: File.expand_path('..', Dir.pwd) } }12capabilities['chromeOptions'] = { prefs: preferences }

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add_preference

Using AI Code Generation

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1sviceriver::Chrome::Service.new(2driver.manage.add_cookie(name: 'foo', value: 'bar')3options.add_preference(:download, default_directory: 'downloads')4caps = Selenium::WebDriver::Remote::Capabilities.chrome(5 chromeOptions: { prefs: { download: { default_directory: 'downloads' } } }6caps = Selenium::WebDriver::Remote::Capabilities.chrome(7 chromeOptions: { prefs: { download: { default_directory: 'downloads' } } }8caps = Selenium:WebDriver::Remote::Capabilities.(9 chromeOptionse { prefs: { download: { default_directory: 'downloads' }

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add_preference

Using AI Code Generation

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1driver.add_preference(:rence method of Selenium.WebDriver.Chrome class2driver.add_preference(:download, :prompt_for_download => false, :default_directory => 'C:\Users\Downloads')3driver.find_element(:link_text, "3.0.1").click

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add_preference

Using AI Code Generation

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1driver.add_preference("browser.download.folderList", 2)2driver.add_preference("browser.download.manager.showWhenStarting", false)3driver.add_preference("browser.download.dir", "C:\\Downloads")4driver.add_preference("browser.helperApps.neverAsk.saveToDisk", "text/​csv")5driver.get("http:/​/​www.google.com")6options.add_preference(:download, :prompt_for_download => false, :default_directory => 'C:\Users\Downloads')7driver.find_element(:link_text, "3.0.1").click

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add_preference

Using AI Code Generation

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1service = Selenium::WebDriver::Chrome::Service.new(2driver.manage.add_cookie(name: 'foo', value: 'bar')3options.add_preference(:download, default_directory: 'downloads')4caps = Selenium::WebDriver::Remote::Capabilities.chrome(5 chromeOptions: { prefs: { download: { default_directory: 'downloads' } } }6caps = Selenium::WebDriver::Remote::Capabilities.chrome(7 chromeOptions: { prefs: { download: { default_directory: 'downloads' } } }8caps = Selenium::WebDriver::Remote::Capabilities.chrome(9 chromeOptions: { prefs: { download: { default_directory: 'downloads' } } }10caps = Selenium::WebDriver::Remote::Capabilities.chrome(11 chromeOptions: { prefs: { download: { default_directory: 'downloads' }

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add_preference

Using AI Code Generation

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1driver.add_preference(:'download.default_directory', '/​home/​username/​Downloads')2driver.find_element(:link_text, 'Download').click3options.add_option(:prefs, :download => {:default_directory => '/​home/​username/​Downloads'})4driver.find_element(:link_text, 'Download').click

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StackOverFlow community discussions

Questions
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Capybara headless download

The Ruby selenium-webdriver API doesn't expose a separate Chrome options object like Java/Python but you can set the options via "Capabilities".

The Capabilities web page provides a Ruby example and the table of recognized capabilities that you can inject. Plugging those together with excludeSwitches:

caps = Selenium::WebDriver::Remote::Capabilities.chrome("chromeOptions" => {"excludeSwitches" => [ "--ignore-certificate-errors" ]})
driver = Selenium::WebDriver.for :chrome, desired_capabilities: caps

Take a look at Watir too, it's a front end for WebDriver.
Their examples show how you can send a :switches array which is passed straight through to the web driver so you can do the same. That makes adding other switches a bit easier rather than going through capabilities.

There is a chromedriver issue on the topic as well. There are posts detailing that you can add a --test-type argument to work around the certificate issue and ruby code examples like above.

https://stackoverflow.com/questions/24874707/unsupported-command-line-flag-ignore-certificate-errors-in-ruby

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