Convert noProxy from string to array in W3C new session payload

Related to #5004

Author: p0deje

rb/lib/selenium/webdriver/remote/w3c/capabilities.rb

@@ -249,6 +249,9 @@ def as_json(*)
                 if value
                   hash['proxy'] = value.as_json
                   hash['proxy']['proxyType'] &&= hash['proxy']['proxyType'].downcase
+                  if hash['proxy']['noProxy'].is_a?(String)
+                    hash['proxy']['noProxy'] = hash['proxy']['noProxy'].split(', ')
+                  end
                 end
               when String, :firefox_binary
                 hash[key.to_s] = value

rb/spec/unit/selenium/webdriver/remote/w3c/capabilities_spec.rb

@@ -27,6 +27,18 @@ module W3C
             caps = described_class.new(proxy: proxy)
             expect(caps.as_json['proxy']['proxyType']).to eq('manual')
           end
+
+          it 'converts noProxy from string to array' do
+            proxy = Selenium::WebDriver::Proxy.new(no_proxy: 'proxy_url, localhost')
+            caps = described_class.new(proxy: proxy)
+            expect(caps.as_json['proxy']['noProxy']).to eq(['proxy_url', 'localhost'])
+          end
+
+          it 'does not convert noProxy if it is already array' do
+            proxy = Selenium::WebDriver::Proxy.new(no_proxy: ['proxy_url'])
+            caps = described_class.new(proxy: proxy)
+            expect(caps.as_json['proxy']['noProxy']).to eq(['proxy_url'])
+          end
         end
       end # W3C
     end # Remote