Add specs

Gemfile

@@ -13,6 +13,7 @@ else
   gem 'mongoid', version
 end
 
+gem 'mongoid_paranoia', '>= 0.6'
 gem 'rake'
 gem 'rspec'
 gem 'rspec-its'

lib/mongoid/slug.rb

@@ -112,8 +112,7 @@ def slug(*fields, &block)
         if __slug_paranoid_doc? # rubocop:disable Style/GuardClause
           set_callback :destroy, :after,  :unset_slug!
           set_callback :restore, :before, :set_slug!
-          set_callback :save,    :before, :reset_slug!, if: :slug_paranoid_deleted?
-          set_callback :save,    :after,  :clear_slug!, if: :slug_paranoid_deleted?
+          set_callback :save,    :before, :clear_slug!, if: :slug_paranoid_deleted?
         end
       end
 

spec/models/agent.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+class Agent
+  include Mongoid::Document
+  include Mongoid::Slug
+  include Mongoid::Paranoia
+
+  field :name
+  slug :name, permanent: true
+end

spec/models/secret_agent.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+Mongoid::Slug.use_paranoia = true
+class SecretAgent
+  include Mongoid::Document
+  include Mongoid::Slug
+  include Mongoid::Paranoia
+
+  field :name
+  slug :name, permanent: true
+end
+Mongoid::Slug.use_paranoia = false

spec/mongoid/paranoia_spec.rb

@@ -0,0 +1,46 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Mongoid::Slug do
+  context 'when paranoia support is not enabled' do
+    let!(:doc) { Agent.create(name: 'Garbo') }
+
+    it 'does not delete the slug when the document is destroyed' do
+      expect(doc.slug).to eq 'garbo'
+      doc.destroy
+      expect(Agent.unscoped.find(doc._id).slug).to eq 'garbo'
+    end
+  end
+
+  context 'when paranoia support is enabled' do
+    let!(:doc) { SecretAgent.create(name: 'Alaric') }
+
+    around do |example|
+      Mongoid::Slug.use_paranoia = true
+      example.run
+    ensure
+      Mongoid::Slug.use_paranoia = false
+    end
+
+    it 'deletes the slug when the document is destroyed' do
+      expect(doc.slug).to eq 'alaric'
+      doc.destroy
+      # TODO: This case should be nil.
+      expect(SecretAgent.unscoped.find(doc._id).slug).to eq doc._id.to_s
+      doc.restore
+      expect(SecretAgent.unscoped.find(doc._id).slug).to eq 'alaric'
+    end
+
+    it 'deletes the slug when deleted document is saved' do
+      expect(doc.slug).to eq 'alaric'
+      doc.deleted_at = Time.current
+      doc.save!
+      expect(SecretAgent.unscoped.find(doc._id).slug).to eq nil
+      # TODO: This case should re-set the slug.
+      doc.deleted_at = nil
+      doc.save!
+      expect(SecretAgent.unscoped.find(doc._id).slug).to eq nil
+    end
+  end
+end

spec/spec_helper.rb

@@ -8,6 +8,7 @@
 require 'active_support'
 require 'active_support/deprecation'
 require 'mongoid'
+require 'mongoid/paranoia'
 
 require File.expand_path '../lib/mongoid/slug', __dir__