Configure watched files after rails initializers have loaded

lib/react/rails/railtie.rb

@@ -24,7 +24,7 @@ class Railtie < ::Rails::Railtie
       config.react.view_helper_implementation = nil # Defaults to ComponentMount
 
       # Watch .jsx files for changes in dev, so we can reload the JS VMs with the new JS code.
-      initializer "react_rails.add_watchable_files", group: :all do |app|
+      initializer "react_rails.add_watchable_files", after: :load_config_initializers, group: :all do |app|
         # Watch files ending in `server_renderer_extensions` in each of `server_renderer_directories`
         reload_paths = config.react.server_renderer_directories.reduce({}) do |memo, dir|
           app_dir = File.join(app.root, dir)

test/dummy/app/pants/yfronts.js

@@ -0,0 +1 @@
+// used for testing file watcher configuration

test/dummy/config/initializers/react.rb

@@ -5,5 +5,10 @@ class CustomComponentMount < React::Rails::ComponentMount
 Dummy::Application.configure do
   config.react.addons = true
   config.react.view_helper_implementation = CustomComponentMount
+  # Add "app/pants" to the array we can test that file watchers are setup after
+  # rails initializers are loaded
+  config.react.server_renderer_directories = ["/app/assets/javascripts/",
+                                              "app/javascript",
+                                              "app/pants"]
 end
 

test/react/rails/railtie_test.rb

@@ -0,0 +1,10 @@
+require "test_helper"
+
+class RailtieTest < ActionDispatch::IntegrationTest
+  test "reloaders are configured after initializers are loaded" do
+    @test_file = File.expand_path("../../dummy/app/pants/yfronts.js", File.dirname(__FILE__))
+    FileUtils.touch @test_file
+    results = Dummy::Application.reloaders.map(&:updated?)
+    assert_includes(results, true)
+  end
+end