Reduce `.times` usage in `StatusPin` and add `PIN_LIMIT` constant in validator (#27945)

app/validators/status_pin_validator.rb

@@ -1,10 +1,12 @@
 # frozen_string_literal: true
 
 class StatusPinValidator < ActiveModel::Validator
+  PIN_LIMIT = 5
+
   def validate(pin)
     pin.errors.add(:base, I18n.t('statuses.pin_errors.reblog')) if pin.status.reblog?
     pin.errors.add(:base, I18n.t('statuses.pin_errors.ownership')) if pin.account_id != pin.status.account_id
     pin.errors.add(:base, I18n.t('statuses.pin_errors.direct')) if pin.status.direct_visibility?
-    pin.errors.add(:base, I18n.t('statuses.pin_errors.limit')) if pin.account.status_pins.count > 4 && pin.account.local?
+    pin.errors.add(:base, I18n.t('statuses.pin_errors.limit')) if pin.account.status_pins.count >= PIN_LIMIT && pin.account.local?
   end
 end

spec/models/status_pin_spec.rb

@@ -40,35 +40,34 @@ RSpec.describe StatusPin do
       expect(described_class.new(account: account, status: status).save).to be false
     end
 
-    max_pins = 5
+    context 'with a pin limit' do
+      before { stub_const('StatusPinValidator::PIN_LIMIT', 2) }
+
       it 'does not allow pins above the max' do
         account = Fabricate(:account)
-      status = []
 
-      (max_pins + 1).times do |i|
+        Fabricate.times(StatusPinValidator::PIN_LIMIT, :status_pin, account: account)
-        status[i] = Fabricate(:status, account: account)
-      end
 
-      max_pins.times do |i|
+        pin = described_class.new(account: account, status: Fabricate(:status, account: account))
-        expect(described_class.new(account: account, status: status[i]).save).to be true
+        expect(pin.save)
-      end
+          .to be(false)
 
-      expect(described_class.new(account: account, status: status[max_pins]).save).to be false
+        expect(pin.errors[:base])
+          .to contain_exactly(I18n.t('statuses.pin_errors.limit'))
       end
 
       it 'allows pins above the max for remote accounts' do
         account = Fabricate(:account, domain: 'remote.test', username: 'bob', url: 'https://remote.test/')
-      status = []
 
-      (max_pins + 1).times do |i|
+        Fabricate.times(StatusPinValidator::PIN_LIMIT, :status_pin, account: account)
-        status[i] = Fabricate(:status, account: account)
+
+        pin = described_class.new(account: account, status: Fabricate(:status, account: account))
+        expect(pin.save)
+          .to be(true)
+
+        expect(pin.errors[:base])
+          .to be_empty
       end
-
-      max_pins.times do |i|
-        expect(described_class.new(account: account, status: status[i]).save).to be true
-      end
-
-      expect(described_class.new(account: account, status: status[max_pins]).save).to be true
     end
   end
 end