Drive system tests with Headless Chrome Browser

Up until this point, our System Tests have been launching (and opening) a Chrome instance to run our test.

While debugging test failures, the visualization of a running browser can make spotting issues easier. However, a separate window flashing open and closed can be jarring and disruptive.

This commit configures out System tests to be driven by a Chrome browser running with the --headless flag. System Tests will still run within the context of a Real Browser :tm:, but that browser won’t be rendered to the screen.

When debugging issues in the future, this configuration could be temporarily reverted.


      test/application_system_test_case.rb

diff --git a/test/application_system_test_case.rb b/test/application_system_test_case.rb
index d19212a..33264b9 100644
--- a/test/application_system_test_case.rb
+++ b/test/application_system_test_case.rb
@@ -1,5 +1,5 @@
 require "test_helper"
 
 class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
-  driven_by :selenium, using: :chrome, screen_size: [1400, 1400]
+  driven_by :selenium, using: :headless_chrome, screen_size: [1400, 1400]
 end