Fix RuboCop offense Performance/AncestorsInclude (#38146).

git-svn-id: https://svn.redmine.org/redmine/trunk@22026 e93f8b46-1217-0410-a6f0-8f06a7374b81

.rubocop_todo.yml

@@ -486,13 +486,6 @@ Naming/VariableNumber:
     - 'test/unit/lib/redmine/scm/adapters/mercurial_adapter_test.rb'
     - 'test/unit/project_test.rb'
 
-# This cop supports unsafe autocorrection (--autocorrect-all).
-Performance/AncestorsInclude:
-  Exclude:
-    - 'test/unit/document_category_test.rb'
-    - 'test/unit/issue_priority_test.rb'
-    - 'test/unit/time_entry_activity_test.rb'
-
 # This cop supports safe autocorrection (--autocorrect).
 Performance/BlockGivenWithExplicitBlock:
   Exclude:

test/unit/document_category_test.rb

@@ -27,7 +27,7 @@ class DocumentCategoryTest < ActiveSupport::TestCase
   end
 
   def test_should_be_an_enumeration
-    assert DocumentCategory.ancestors.include?(Enumeration)
+    assert DocumentCategory <= Enumeration
   end
 
   def test_objects_count

test/unit/issue_priority_test.rb

@@ -49,7 +49,7 @@ class IssuePriorityTest < ActiveSupport::TestCase
   end
 
   def test_should_be_an_enumeration
-    assert IssuePriority.ancestors.include?(Enumeration)
+    assert IssuePriority <= Enumeration
   end
 
   def test_objects_count

test/unit/time_entry_activity_test.rb

@@ -37,7 +37,7 @@ class TimeEntryActivityTest < ActiveSupport::TestCase
   end
 
   def test_should_be_an_enumeration
-    assert TimeEntryActivity.ancestors.include?(Enumeration)
+    assert TimeEntryActivity <= Enumeration
   end
 
   def test_objects_count