Extract `TEXT_LENGTH_LIMIT` constant in `Appeal` class (#30638)

app/models/appeal.rb

@@ -18,6 +18,8 @@
 class Appeal < ApplicationRecord
   MAX_STRIKE_AGE = 20.days
 
+  TEXT_LENGTH_LIMIT = 2_000
+
   belongs_to :account
   belongs_to :strike, class_name: 'AccountWarning', foreign_key: 'account_warning_id', inverse_of: :appeal
 
@@ -26,7 +28,7 @@ class Appeal < ApplicationRecord
     belongs_to :rejected_by_account
   end
 
-  validates :text, presence: true, length: { maximum: 2_000 }
+  validates :text, presence: true, length: { maximum: TEXT_LENGTH_LIMIT }
   validates :account_warning_id, uniqueness: true
 
   validate :validate_time_frame, on: :create

spec/models/appeal_spec.rb

@@ -3,6 +3,19 @@
 require 'rails_helper'
 
 describe Appeal do
+  describe 'Validations' do
+    it 'validates text length is under limit' do
+      appeal = Fabricate.build(
+        :appeal,
+        strike: Fabricate(:account_warning),
+        text: 'a' * described_class::TEXT_LENGTH_LIMIT * 2
+      )
+
+      expect(appeal).to_not be_valid
+      expect(appeal).to model_have_error_on_field(:text)
+    end
+  end
+
   describe 'scopes' do
     describe 'approved' do
       let(:approved_appeal) { Fabricate(:appeal, approved_at: 10.days.ago) }