WIP: workaround for working with separate preferences with remote Selenium

Author: pablobm

.devcontainer/compose.yaml

@@ -20,12 +20,22 @@ services:
     # (Adding the "ports" property to this file will not forward from a Codespace.)
     depends_on:
     - selenium
+    - seleniumde
+    - seleniumnolang
     - postgres
 
   selenium:
     image: selenium/standalone-firefox
     restart: unless-stopped
 
+  seleniumde:
+    image: selenium/standalone-firefox
+    restart: unless-stopped
+
+  seleniumnolang:
+    image: selenium/standalone-firefox
+    restart: unless-stopped
+
   postgres:
     image: postgres:16.1
     restart: unless-stopped

test/system/embed_test.rb

@@ -10,7 +10,15 @@ class EmbedTest < ApplicationSystemTestCase
 end
 
 class GermanEmbedTest < ApplicationSystemTestCase
-  driven_by :selenium, :using => :headless_firefox, :options => { :name => :selenium_de } do |options|
+  driven_by(
+    :selenium,
+    :using => :headless_firefox,
+    :options => {
+      :url => "http://seleniumde:4444",
+      :browser => :remote,
+      :name => :selenium_de
+    }
+  ) do |options|
     options.add_preference("intl.accept_languages", "de")
   end
 
@@ -21,8 +29,17 @@ class GermanEmbedTest < ApplicationSystemTestCase
 end
 
 class UnknownLanguageEmbedTest < ApplicationSystemTestCase
-  driven_by :selenium, :using => :headless_firefox, :options => { :name => :selenium_unknown_language } do |options|
+  driven_by(
+    :selenium,
+    :using => :headless_firefox,
+    :options => {
+      :url => "http://seleniumnolang:4444",
+      :browser => :remote,
+      :name => :selenium_unknown_language
+    }
+  ) do |options|
     options.add_preference("intl.accept_languages", "unknown-language")
+    options.binary = Settings.system_test_firefox_binary if Settings.system_test_firefox_binary
   end
 
   test "shows report link in fallback language" do

test/test_helper.rb

@@ -36,7 +36,7 @@ def self.branch_coverage?
 require "webmock/minitest"
 require "minitest/focus" unless ENV["CI"]
 
-WebMock.disable_net_connect!(:allow_localhost => true, :allow => %w[selenium rails-app])
+WebMock.disable_net_connect!(:allow_localhost => true, :allow => %w[selenium seleniumde seleniumnolang rails-app])
 
 module ActiveSupport
   class TestCase