Fix inherited hook in helper

Author: javierav

CHANGELOG.md

@@ -1,3 +1,6 @@
+## Unreleased
+- Fix issue with inherited hook in helper ([#33](https://github.com/avo-hq/class_variants/pull/33))
+
 ## 1.1.0 (2025-01-20)
 - Add support for merging ([#23](https://github.com/avo-hq/class_variants/pull/23))
 - Add support for subclass inheritance in helper ([#24](https://github.com/avo-hq/class_variants/pull/24))

lib/class_variants/helper.rb

@@ -11,9 +11,12 @@ def class_variants(...)
     def self.included(base)
       base.extend(ClassMethods)
       base.singleton_class.instance_variable_set(:@_class_variants_instance, ClassVariants::Instance.new)
-      base.define_singleton_method(:inherited) do |subclass|
+
+      def base.inherited(subclass)
+        super if defined?(super)
+
         subclass.singleton_class.instance_variable_set(
-          :@_class_variants_instance, base.singleton_class.instance_variable_get(:@_class_variants_instance).dup
+          :@_class_variants_instance, singleton_class.instance_variable_get(:@_class_variants_instance).dup
         )
       end
     end

test/helper_test.rb

@@ -1,21 +1,35 @@
 require "test_helper"
 
 class HelperTest < Minitest::Test
-  class DemoClass
+  class BaseClass
+  end
+
+  class DemoClass < BaseClass
     include ClassVariants::Helper
 
     class_variants base: "rounded border"
   end
 
-  class Subclass < DemoClass
+  class SubClass < DemoClass
     class_variants base: "bg-black"
   end
 
+  def test_inherited
+    mock = Minitest::Mock.new
+    mock.expect(:call, nil, [Class])
+
+    BaseClass.stub(:inherited, mock) do
+      Class.new(DemoClass)
+    end
+
+    mock.verify
+  end
+
   def test_call_from_instance
     assert_equal "rounded border", DemoClass.new.class_variants
   end
 
   def test_call_from_subclass
-    assert_equal "rounded border bg-black", Subclass.new.class_variants
+    assert_equal "rounded border bg-black", SubClass.new.class_variants
   end
 end