Update ActiveRecord::OrTest#test_or_when_grouping (#38978)

Co-authored-by: NRyuta Kamizono <kamipo@gmail.com>

activerecord/test/cases/relation/or_test.rb

@@ -95,9 +95,9 @@ def test_or_with_incompatible_unscope
     end
 
     def test_or_when_grouping
-      groups = Post.where("id < 10").group("body").select("body, COUNT(*) AS c")
-      expected = groups.having("COUNT(*) > 1 OR body like 'Such%'").to_a.map { |o| [o.body, o.c] }
-      assert_equal expected, groups.having("COUNT(*) > 1").or(groups.having("body like 'Such%'")).to_a.map { |o| [o.body, o.c] }
+      groups = Post.where("id < 10").group("body")
+      expected = groups.having("COUNT(*) > 1 OR body like 'Such%'").count
+      assert_equal expected, groups.having("COUNT(*) > 1").or(groups.having("body like 'Such%'")).count
     end
 
     def test_or_with_named_scope