Define the `url_options` needed for SytemTest inside the route proxy:

- I made a change in https://github.com/rails/rails/pull/36691 to
  delegate route helper to a proxy class.
  This didn't take into account that the `url_options` we redefine
  in SystemTest would be ignored.

  This PR fixes that by definin the url_options inside the proxy

1 files changed, 45 insertions, 0 deletions

diff --git a/railties/test/application/system_test_case_test.rb b/railties/test/application/system_test_case_test.rb
new file mode 100644
index 0000000000..d15a0d9210
--- /dev/null
+++ b/railties/test/application/system_test_case_test.rb
@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+require "isolation/abstract_unit"
+require "rack/test"
+
+class SystemTestCaseTest < ActiveSupport::TestCase
+  include ActiveSupport::Testing::Isolation
+
+  def setup
+    build_app
+  end
+
+  def teardown
+    teardown_app
+  end
+
+  test "url helpers are delegated to a proxy class" do
+    app_file "config/routes.rb", <<-RUBY
+      Rails.application.routes.draw do
+        get 'foo', to: 'foo#index', as: 'test_foo'
+      end
+    RUBY
+
+    app("test")
+
+    assert_not_includes(ActionDispatch::SystemTestCase.runnable_methods, :test_foo_url)
+  end
+
+  test "system tests set the Capybara host in the url_options by default" do
+    app_file "config/routes.rb", <<-RUBY
+      Rails.application.routes.draw do
+        get 'foo', to: 'foo#index', as: 'test_foo'
+      end
+    RUBY
+
+    app("test")
+    system_test = ActionDispatch::SystemTestCase.new("my_test")
+    previous_app_host = ::Capybara.app_host
+    ::Capybara.app_host = "https://my_test_example.com"
+
+    assert_equal("https://my_test_example.com/foo", system_test.test_foo_url)
+  ensure
+    ::Capybara.app_host = previous_app_host
+  end
+end