add test cases and expect_correction

Author: masato-bkn

spec/rubocop/cop/rails/redundant_active_record_all_method_spec.rb

@@ -213,6 +213,17 @@
       end
     end
 
+    it 'registers an offense and corrects when the receiver for `all` is Active Record relation object' do
+      expect_offense(<<~RUBY)
+        user.articles.all.order(:created_at)
+                      ^^^ Redundant `all` detected.
+      RUBY
+
+      expect_correction(<<~RUBY)
+        user.articles.order(:created_at)
+      RUBY
+    end
+
     it 'does not register an offense when no method follows `all`' do
       expect_no_offenses(<<~RUBY)
         User.all
@@ -254,6 +265,12 @@ class User < ApplicationRecord
                               ^^^ Redundant `all` detected.
         end
       RUBY
+
+      expect_correction(<<~RUBY)
+        class User < ApplicationRecord
+          scope :admins, -> { where(admin: true) }
+        end
+      RUBY
     end
 
     it 'registers an offense when inheriting `::ApplicationRecord`' do
@@ -263,6 +280,12 @@ class User < ::ApplicationRecord
                               ^^^ Redundant `all` detected.
         end
       RUBY
+
+      expect_correction(<<~RUBY)
+        class User < ::ApplicationRecord
+          scope :admins, -> { where(admin: true) }
+        end
+      RUBY
     end
 
     it 'registers an offense when inheriting `ActiveRecord::Base`' do
@@ -272,6 +295,12 @@ class User < ActiveRecord::Base
                               ^^^ Redundant `all` detected.
         end
       RUBY
+
+      expect_correction(<<~RUBY)
+        class User < ActiveRecord::Base
+          scope :admins, -> { where(admin: true) }
+        end
+      RUBY
     end
 
     it 'registers an offense when inheriting `::ActiveRecord::Base`' do
@@ -281,6 +310,12 @@ class User < ::ActiveRecord::Base
                               ^^^ Redundant `all` detected.
         end
       RUBY
+
+      expect_correction(<<~RUBY)
+        class User < ::ActiveRecord::Base
+          scope :admins, -> { where(admin: true) }
+        end
+      RUBY
     end
   end
 end