1 files changed, 21 insertions, 7 deletions
diff --git a/activerecord/test/cases/relation/delegation_test.rb b/activerecord/test/cases/relation/delegation_test.rb
index cb6e4d76d3..2696d1bb00 100644
--- a/activerecord/test/cases/relation/delegation_test.rb
+++ b/activerecord/test/cases/relation/delegation_test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require "cases/helper"
 require "models/post"
 require "models/comment"
@@ -8,8 +10,8 @@ module ActiveRecord
       :+, :-, :|, :&, :[], :shuffle,
       :all?, :collect, :compact, :detect, :each, :each_cons, :each_with_index,
       :exclude?, :find_all, :flat_map, :group_by, :include?, :length,
-      :map, :none?, :one?, :partition, :reject, :reverse,
-      :sample, :second, :sort, :sort_by, :third,
+      :map, :none?, :one?, :partition, :reject, :reverse, :rotate,
+      :sample, :second, :sort, :sort_by, :slice, :third, :index, :rindex,
       :to_ary, :to_set, :to_xml, :to_yaml, :join,
       :in_groups, :in_groups_of, :to_sentence, :to_formatted_s, :as_json
     ]
@@ -21,20 +23,32 @@ module ActiveRecord
     end
   end
 
+  module DeprecatedArelDelegationTests
+    AREL_METHODS = [
+      :with, :orders, :froms, :project, :projections, :taken, :constraints, :exists, :locked, :where_sql,
+      :ast, :source, :join_sources, :to_dot, :create_insert, :create_true, :create_false
+    ]
+
+    def test_deprecate_arel_delegation
+      AREL_METHODS.each do |method|
+        assert_deprecated { target.public_send(method) }
+        assert_deprecated { target.public_send(method) }
+      end
+    end
+  end
+
   class DelegationAssociationTest < ActiveRecord::TestCase
     include DelegationWhitelistTests
-
-    fixtures :posts
+    include DeprecatedArelDelegationTests
 
     def target
-      Post.first.comments
+      Post.new.comments
     end
   end
 
   class DelegationRelationTest < ActiveRecord::TestCase
     include DelegationWhitelistTests
-
-    fixtures :comments
+    include DeprecatedArelDelegationTests
 
     def target
       Comment.all