Unblock domain service specs/refactor (#2867)

* Add spec for unblock domain service

* Refactor UnblockDomainService

app/services/unblock_domain_service.rb

 # frozen_string_literal: true
 
 class UnblockDomainService < BaseService
+  attr_accessor :domain_block
+
   def call(domain_block, retroactive)
-    if retroactive
-      accounts = Account.where(domain: domain_block.domain).in_batches
+    @domain_block = domain_block
+    process_retroactive_updates if retroactive
+    domain_block.destroy
+  end
 
-      if domain_block.silence?
-        accounts.update_all(silenced: false)
-      else
-        accounts.update_all(suspended: false)
-      end
-    end
+  def process_retroactive_updates
+    blocked_accounts.in_batches.update_all(update_options)
+  end
 
-    domain_block.destroy
+  def blocked_accounts
+    Account.where(domain: domain_block.domain)
+  end
+
+  def update_options
+    { domain_block_impact => false }
+  end
+
+  def domain_block_impact
+    domain_block.silence? ? :silenced : :suspended
   end
 end

spec/services/unblock_domain_service_spec.rb

+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe UnblockDomainService do
+  subject { described_class.new }
+
+  describe 'call' do
+    before do
+      @silenced = Fabricate(:account, domain: 'example.com', silenced: true)
+      @suspended = Fabricate(:account, domain: 'example.com', suspended: true)
+      @domain_block = Fabricate(:domain_block, domain: 'example.com')
+    end
+
+    context 'without retroactive' do
+      it 'removes the domain block' do
+        subject.call(@domain_block, false)
+        expect_deleted_domain_block
+      end
+    end
+
+    context 'with retroactive' do
+      it 'unsilences accounts and removes block' do
+        @domain_block.update(severity: :silence)
+
+        subject.call(@domain_block, true)
+        expect_deleted_domain_block
+        expect(@silenced.reload.silenced).to be false
+        expect(@suspended.reload.suspended).to be true
+      end
+
+      it 'unsuspends accounts and removes block' do
+        @domain_block.update(severity: :suspend)
+
+        subject.call(@domain_block, true)
+        expect_deleted_domain_block
+        expect(@suspended.reload.suspended).to be false
+        expect(@silenced.reload.silenced).to be true
+      end
+    end
+  end
+
+  def expect_deleted_domain_block
+    expect { @domain_block.reload }.to raise_error(ActiveRecord::RecordNotFound)
+  end
+end