Fix Lint/ConstantDefinitionInBlock cop (#24763)

spec/lib/activitypub/adapter_spec.rb

@@ -3,43 +3,51 @@
 require 'rails_helper'
 
 RSpec.describe ActivityPub::Adapter do
-  class TestObject < ActiveModelSerializers::Model
-    attributes :foo
-  end
-
-  class TestWithBasicContextSerializer < ActivityPub::Serializer
-    attributes :foo
-  end
-
-  class TestWithNamedContextSerializer < ActivityPub::Serializer
-    context :security
-    attributes :foo
-  end
-
-  class TestWithNestedNamedContextSerializer < ActivityPub::Serializer
-    attributes :foo
-
-    has_one :virtual_object, key: :baz, serializer: TestWithNamedContextSerializer
-
-    def virtual_object
-      object
+  before do
+    test_object_class = Class.new(ActiveModelSerializers::Model) do
+      attributes :foo
     end
-  end
+    stub_const('TestObject', test_object_class)
 
-  class TestWithContextExtensionSerializer < ActivityPub::Serializer
-    context_extensions :sensitive
-    attributes :foo
-  end
-
-  class TestWithNestedContextExtensionSerializer < ActivityPub::Serializer
-    context_extensions :manually_approves_followers
-    attributes :foo
-
-    has_one :virtual_object, key: :baz, serializer: TestWithContextExtensionSerializer
-
-    def virtual_object
-      object
+    test_with_basic_context_serializer = Class.new(ActivityPub::Serializer) do
+      attributes :foo
     end
+    stub_const('TestWithBasicContextSerializer', test_with_basic_context_serializer)
+
+    test_with_named_context_serializer = Class.new(ActivityPub::Serializer) do
+      context :security
+      attributes :foo
+    end
+    stub_const('TestWithNamedContextSerializer', test_with_named_context_serializer)
+
+    test_with_nested_named_context_serializer = Class.new(ActivityPub::Serializer) do
+      attributes :foo
+
+      has_one :virtual_object, key: :baz, serializer: TestWithNamedContextSerializer
+
+      def virtual_object
+        object
+      end
+    end
+    stub_const('TestWithNestedNamedContextSerializer', test_with_nested_named_context_serializer)
+
+    test_with_context_extension_serializer = Class.new(ActivityPub::Serializer) do
+      context_extensions :sensitive
+      attributes :foo
+    end
+    stub_const('TestWithContextExtensionSerializer', test_with_context_extension_serializer)
+
+    test_with_nested_context_extension_serializer = Class.new(ActivityPub::Serializer) do
+      context_extensions :manually_approves_followers
+      attributes :foo
+
+      has_one :virtual_object, key: :baz, serializer: TestWithContextExtensionSerializer
+
+      def virtual_object
+        object
+      end
+    end
+    stub_const('TestWithNestedContextExtensionSerializer', test_with_nested_context_extension_serializer)
   end
 
   describe '#serializable_hash' do