Add shared example for Expireable concern (#33369)

spec/models/custom_filter_spec.rb

@@ -3,6 +3,8 @@
 require 'rails_helper'
 
 RSpec.describe CustomFilter do
+  include_examples 'Expireable'
+
   describe 'Validations' do
     it { is_expected.to validate_presence_of(:title) }
     it { is_expected.to validate_presence_of(:context) }

spec/models/invite_spec.rb

@@ -3,6 +3,8 @@
 require 'rails_helper'
 
 RSpec.describe Invite do
+  include_examples 'Expireable'
+
   describe '#valid_for_use?' do
     it 'returns true when there are no limitations' do
       invite = Fabricate(:invite, max_uses: nil, expires_at: nil)

spec/models/ip_block_spec.rb

@@ -3,6 +3,8 @@
 require 'rails_helper'
 
 RSpec.describe IpBlock do
+  include_examples 'Expireable'
+
   describe 'Validations' do
     subject { Fabricate.build :ip_block }
 

spec/models/mute_spec.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe Mute do
+  include_examples 'Expireable'
+
+  describe 'Associations' do
+    it { is_expected.to belong_to(:account).required }
+    it { is_expected.to belong_to(:target_account).required }
+  end
+
+  describe 'Validations' do
+    subject { Fabricate.build :mute }
+
+    it { is_expected.to validate_uniqueness_of(:account_id).scoped_to(:target_account_id) }
+  end
+end

spec/models/poll_spec.rb

@@ -3,6 +3,8 @@
 require 'rails_helper'
 
 RSpec.describe Poll do
+  include_examples 'Expireable'
+
   describe 'Scopes' do
     let(:status) { Fabricate(:status) }
     let(:attached_poll) { Fabricate(:poll, status: status) }