Ruby: Chrome browser is not launching

Question

Recently I have installed gem 'webdrivers', '~> 4.0' and trying to launch a chrome browser. But it's not working.

Code:

@app = Driver.new(Capybara::Session.new(:selenium_chrome))
Webdrivers::Chromedriver.current_version

Error log:

An error occurred while loading ./spec/login_spec.rb.
Failure/Error: require_relative '../pages/nav_bar.rb'

SyntaxError:
  /Users/madhan_kumaravel/.rvm/gems/ruby-2.2.8/gems/webdrivers-4.1.2/lib/webdrivers/chrome_finder.rb:83: syntax error, unexpected '.'
  ....VersionInfo.ProductVersion")&.strip
  ...                               ^
  /Users/madhan_kumaravel/.rvm/gems/ruby-2.2.8/gems/webdrivers-4.1.2/lib/webdrivers/chrome_finder.rb:87: syntax error, unexpected '.'
          System.call(location, '--product-version')&.strip
                                                      ^
  /Users/madhan_kumaravel/.rvm/gems/ruby-2.2.8/gems/webdrivers-4.1.2/lib/webdrivers/chrome_finder.rb:91: syntax error, unexpected '.'
          System.call(location, '--version')&.strip

It seems the gem is using Ruby 2.3 syntax (`&.` - safe navigation operator) but you try to run it on 2.2. — Marek Lipka, Dec 19 '19 at 10:06

score 1 · Accepted Answer · answered Dec 27 '19 at 18:52

As Marek mentioned in the comments, the gem is using the safe navigation operator which is only available in Ruby 2.3 and above. Either upgrade to Ruby 2.3 or downgrade webdrivers to 3.9.4, e.g. gem 'webdrivers', '~> 4.0'.

I looked through the code for 3.9.4 and they don't seem to use the safe navigation operator, so it's worth giving a shot.

Ruby: Chrome browser is not launching

1 Answers1