Merge pull request rails#43436 from Shopify/43306-serialize-anon-class

Raise error when serializing an anonymous class.

Author: gmcgibbon

activejob/CHANGELOG.md

@@ -1,3 +1,9 @@
+*   Raise an `SerializationError` in `Serializer::ModuleSerializer`
+    if the module name is not present. 
+
+    *Veerpal Brar*
+
+
 ## Rails 7.0.0.alpha2 (September 15, 2021) ##
 
 *   No changes.

activejob/lib/active_job/serializers/module_serializer.rb

@@ -4,6 +4,7 @@ module ActiveJob
   module Serializers
     class ModuleSerializer < ObjectSerializer # :nodoc:
       def serialize(constant)
+        raise SerializationError, "Serializing an anonymous class is not supported" unless constant.name
         super("value" => constant.name)
       end
 

activejob/test/cases/argument_serialization_test.rb

@@ -50,7 +50,7 @@ class ClassArgument; end
     end
   end
 
-  [ Object.new, Person.find("5").to_gid ].each do |arg|
+  [ Object.new, Person.find("5").to_gid, Class.new ].each do |arg|
     test "does not serialize #{arg.class}" do
       assert_raises ActiveJob::SerializationError do
         ActiveJob::Arguments.serialize [ arg ]