Chrome 62 and Flash - ruby

Question

I have a Flash-based app that I need to test using Cucumber. As flash is not enabled by default I need to enable it before each test and whitelist the url I believe. If I pause the test in it's background phase I can manually set these options.
How can I automate this approach though, I have looked into adding options and preferences, but still cannot seem to get to work.
So this is my standard setup in an env.rb file
Capybara.register_driver :chrome do |app|
chrome_binary = '/Applications/Google Chrome.app'
capabilities = Selenium::WebDriver::Remote::Capabilities.chrome("chromeOptions" => { "binary" => chrome_binary + '/Contents/MacOS/Google Chrome' })
Capybara::Selenium::Driver.new(app, :browser => :chrome, :desired_capabilities => capabilities, :options => options)
end
Further reading has highlighted options such as
options = Selenium::WebDriver::Chrome::Options.new
options.add_argument('arg-here')
prefs = {"enable flash here ? "}
options.add_experimental_option("prefs", prefs)
The add_experimental_option throws undefined method add_experimental_option for #<Selenium::WebDriver::Chrome::Options:0x007fca30c10988>
Has anyone automated this process?

Answer 1

To enable Flash before each test and WhiteList the url you can use the following code block to configure the WebDriver instance to allow Flash:
ChromeOptions options = new ChromeOptions();
Map<String, Object> prefs = new HashMap<String, Object>();
prefs.put("profile.default_content_setting_values.plugins", 1);
prefs.put("profile.content_settings.plugin_whitelist.adobe-flash-player", 1);
prefs.put("profile.content_settings.exceptions.plugins.*,*.per_resource.adobe-flash-player", 1);
prefs.put("PluginsAllowedForUrls", "https://your_url.com");
options.setExperimentalOption("prefs", prefs);
WebDriver driver = new ChromeDriver(options);
Here you can find a detailed discussion on Manage Flash in Chrome and on PluginsAllowedForUrls
Update :
You haven't mentioned in your comment through which client you are not able to find setExperimentalOption or set_experimental_option. Here is the snapshot from my IDE which have no errors/warnings :
And here is the JavaDoc :

Answer 2

This is what worked for me in the end
Capybara.register_driver :chrome do |app|
chrome_binary = '/Applications/Google Chrome.app'
prefs = {"profile.default_content_setting_values.plugins" => 1,
"profile.content_settings.plugin_whitelist.adobe-flash-player" => 1,
"profile.content_settings.exceptions.plugins.*,*.per_resource.adobe-flash-player" => 1,
"PluginsAllowedForUrls" => "hendricks-as3.localhost.bbc.co.uk"
}
capabilities = Selenium::WebDriver::Remote::Capabilities.chrome("chromeOptions" => { "binary" => chrome_binary + '/Contents/MacOS/Google Chrome', "prefs" => prefs })
Capybara::Selenium::Driver.new(app, :browser => :chrome, :desired_capabilities => capabilities)
end
Reading this documentation helped me realise what to do. (also DebanjanB answer helped me with the specific profile options but as in Java no good to my specific needs, thanks though :-) )
https://sites.google.com/a/chromium.org/chromedriver/capabilities