Use normalizes to prepare Webhook#events value (#27605)

spec/models/webhook_spec.rb

@@ -5,6 +5,37 @@ require 'rails_helper'
 RSpec.describe Webhook do
   let(:webhook) { Fabricate(:webhook) }
 
+  describe 'Validations' do
+    it 'requires presence of events' do
+      record = described_class.new(events: nil)
+      record.valid?
+
+      expect(record).to model_have_error_on_field(:events)
+    end
+
+    it 'requires non-empty events value' do
+      record = described_class.new(events: [])
+      record.valid?
+
+      expect(record).to model_have_error_on_field(:events)
+    end
+
+    it 'requires valid events value from EVENTS' do
+      record = described_class.new(events: ['account.invalid'])
+      record.valid?
+
+      expect(record).to model_have_error_on_field(:events)
+    end
+  end
+
+  describe 'Normalizations' do
+    it 'cleans up events values' do
+      record = described_class.new(events: ['account.approved', 'account.created     ', ''])
+
+      expect(record.events).to eq(%w(account.approved account.created))
+    end
+  end
+
   describe '#rotate_secret!' do
     it 'changes the secret' do
       previous_value = webhook.secret