Add AccountMigration#remaining_cooldown_days method (#38561)

app/models/account_migration.rb

@@ -60,6 +60,10 @@ class AccountMigration < ApplicationRecord
     created_at + COOLDOWN_PERIOD
   end
 
+  def remaining_cooldown_days
+    ((cooldown_at - Time.current) / 1.day).ceil
+  end
+
   private
 
   def set_target_account

app/views/settings/migrations/show.html.haml

@@ -24,7 +24,7 @@
 = simple_form_for @migration, url: settings_migration_path do |f|
   - if on_cooldown?
     %p.hint
-      %span.warning-hint= t('migrations.on_cooldown', count: ((@cooldown.cooldown_at - Time.now.utc) / 1.day.seconds).ceil)
+      %span.warning-hint= t('migrations.on_cooldown', count: @cooldown.remaining_cooldown_days)
   - else
     %p.hint= t('migrations.warning.before')
 

spec/models/account_migration_spec.rb

@@ -51,4 +51,24 @@ RSpec.describe AccountMigration do
       it { is_expected.to_not allow_value(target_acct).for(:acct) }
     end
   end
+
+  describe '#remaining_cooldown_days' do
+    subject { account_migration.remaining_cooldown_days }
+
+    before { stub_const('AccountMigration::COOLDOWN_PERIOD', 30.days) }
+
+    let(:account_migration) { Fabricate :account_migration, created_at: }
+
+    context 'with a record still in cooldown' do
+      let(:created_at) { 15.days.ago }
+
+      it { is_expected.to eq(15) }
+    end
+
+    context 'with a record out of cooldown' do
+      let(:created_at) { 150.days.ago }
+
+      it { is_expected.to be_negative }
+    end
+  end
 end