Add missing deprecated errors methods

Fixes for Rails/DeprecatedActiveModelErrorsMethods:
- The `values`, `to_h`, and `to_xml` methods are deprecated too.

changelog/fix_deprecated_errors_missing_methods.md

@@ -0,0 +1 @@
+* [#742](https://github.com/rubocop/rubocop-rails/pull/742): Rails/DeprecatedActiveModelErrorsMethods was missing the deprecated `values`, `to_h`, and `to_xml` methods. ([@BrianHawley][])

lib/rubocop/cop/rails/deprecated_active_model_errors_methods.rb

@@ -38,6 +38,7 @@ class DeprecatedActiveModelErrorsMethods < Base
 
         MSG = 'Avoid manipulating ActiveModel errors as hash directly.'
         AUTOCORECTABLE_METHODS = %i[<< clear keys].freeze
+        INCOMPATIBLE_METHODS = %i[keys values to_h to_xml].freeze
 
         MANIPULATIVE_METHODS = Set[
           *%i[
@@ -55,7 +56,7 @@ class DeprecatedActiveModelErrorsMethods < Base
           {
             #root_manipulation?
             #root_assignment?
-            #errors_keys?
+            #errors_deprecated?
             #messages_details_manipulation?
             #messages_details_assignment?
           }
@@ -77,10 +78,10 @@ class DeprecatedActiveModelErrorsMethods < Base
             ...)
         PATTERN
 
-        def_node_matcher :errors_keys?, <<~PATTERN
+        def_node_matcher :errors_deprecated?, <<~PATTERN
           (send
             (send #receiver_matcher :errors)
-            :keys)
+            {:keys :values :to_h :to_xml})
         PATTERN
 
         def_node_matcher :messages_details_manipulation?, <<~PATTERN
@@ -106,7 +107,7 @@ class DeprecatedActiveModelErrorsMethods < Base
 
         def on_send(node)
           any_manipulation?(node) do
-            next if node.method?(:keys) && target_rails_version <= 6.0
+            next if target_rails_version <= 6.0 && INCOMPATIBLE_METHODS.include?(node.method_name)
 
             add_offense(node) do |corrector|
               next unless AUTOCORECTABLE_METHODS.include?(node.method_name)

spec/rubocop/cop/rails/deprecated_active_model_errors_methods_spec.rb

@@ -64,6 +64,39 @@
             RUBY
           end
         end
+
+        context 'when using `values` method' do
+          it 'registers an offense' do
+            expect_offense(<<~RUBY, file_path)
+              user.errors.values
+              ^^^^^^^^^^^^^^^^^^ Avoid manipulating ActiveModel errors as hash directly.
+            RUBY
+
+            expect_no_corrections
+          end
+        end
+
+        context 'when using `to_h` method' do
+          it 'registers an offense' do
+            expect_offense(<<~RUBY, file_path)
+              user.errors.to_h
+              ^^^^^^^^^^^^^^^^ Avoid manipulating ActiveModel errors as hash directly.
+            RUBY
+
+            expect_no_corrections
+          end
+        end
+
+        context 'when using `to_xml` method' do
+          it 'registers an offense' do
+            expect_offense(<<~RUBY, file_path)
+              user.errors.to_xml
+              ^^^^^^^^^^^^^^^^^^ Avoid manipulating ActiveModel errors as hash directly.
+            RUBY
+
+            expect_no_corrections
+          end
+        end
       end
 
       context 'Rails <= 6.0', :rails60 do
@@ -81,6 +114,30 @@
             RUBY
           end
         end
+
+        context 'when using `values` method' do
+          it 'does not register an offense' do
+            expect_no_offenses(<<~RUBY, file_path)
+              user.errors.values
+            RUBY
+          end
+        end
+
+        context 'when using `to_h` method' do
+          it 'does not register an offense' do
+            expect_no_offenses(<<~RUBY, file_path)
+              user.errors.to_h
+            RUBY
+          end
+        end
+
+        context 'when using `to_xml` method' do
+          it 'does not register an offense' do
+            expect_no_offenses(<<~RUBY, file_path)
+              user.errors.to_xml
+            RUBY
+          end
+        end
       end
     end
 
@@ -238,6 +295,39 @@ def expect_no_corrections_if_model_file(file_path)
             RUBY
           end
         end
+
+        context 'when using `values` method' do
+          it 'registers an offense' do
+            expect_offense_if_model_file(<<~RUBY, file_path)
+              errors.values
+              ^^^^^^^^^^^^^ Avoid manipulating ActiveModel errors as hash directly.
+            RUBY
+
+            expect_no_corrections_if_model_file(file_path)
+          end
+        end
+
+        context 'when using `to_h` method' do
+          it 'registers an offense' do
+            expect_offense_if_model_file(<<~RUBY, file_path)
+              errors.to_h
+              ^^^^^^^^^^^ Avoid manipulating ActiveModel errors as hash directly.
+            RUBY
+
+            expect_no_corrections_if_model_file(file_path)
+          end
+        end
+
+        context 'when using `to_xml` method' do
+          it 'registers an offense' do
+            expect_offense_if_model_file(<<~RUBY, file_path)
+              errors.to_xml
+              ^^^^^^^^^^^^^ Avoid manipulating ActiveModel errors as hash directly.
+            RUBY
+
+            expect_no_corrections_if_model_file(file_path)
+          end
+        end
       end
 
       context 'Rails <= 6.0', :rails60 do
@@ -248,6 +338,30 @@ def expect_no_corrections_if_model_file(file_path)
             RUBY
           end
         end
+
+        context 'when using `values` method' do
+          it 'does not register an offense' do
+            expect_no_offenses(<<~RUBY, file_path)
+              user.errors.values
+            RUBY
+          end
+        end
+
+        context 'when using `to_h` method' do
+          it 'does not register an offense' do
+            expect_no_offenses(<<~RUBY, file_path)
+              user.errors.to_h
+            RUBY
+          end
+        end
+
+        context 'when using `to_xml` method' do
+          it 'does not register an offense' do
+            expect_no_offenses(<<~RUBY, file_path)
+              user.errors.to_xml
+            RUBY
+          end
+        end
       end
 
       context 'when calling non-manipulative methods' do