✅ fixes unit test

test/unit/liquid/filters/rails_helpers_test.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'test_helper'
 
 class Liquid::Filters::RailsHelpersTest < ActiveSupport::TestCase
@@ -10,8 +12,34 @@ def setup
 
   test 'javascript_include_tag' do
     @context.registers[:controller] = ApplicationController.new
-    WebpackHelper.expects(:javascript_packs_with_chunks_tag).returns('/packs/stats.js') # TODO: FIXME!!!
-    assert_equal "<script src=\"/packs/stats.js\"></script>", javascript_include_tag('stats.js')
+
+    test_manifest ||= {
+      entrypoints: {
+        stats: {
+          assets: {
+            js: ['/packs/stats.js'],
+            css: ['/packs/stats.css']
+          }
+        },
+        'validate_signup.ts': {
+          assets: {
+            js: ['/packs/foo.js']
+          }
+        }
+      }
+    }.to_json
+
+    # FIXME: we should mock javascript_packs_with_chunks_tag or load_webpack_manifest instead of File
+    File.stubs(:read).with('public/packs/manifest.json').returns(test_manifest).once
+
+    assert_same_elements [
+      "<script src=\"/packs/stats.js\"></script>",
+      "<link rel=\"stylesheet\" media=\"screen\" href=\"/packs/stats.css\" />"
+    ], javascript_include_tag('stats.js').split(/\n/)
+
+    assert_same_elements [
+      "<script src=\"/packs/foo.js\"></script>"
+    ], javascript_include_tag('validate_signup.js').split(/\n/)
   end
 
   test 'mail_to' do