Convert settings/migration/redirects spec controller->system (#33905)

spec/system/settings/migration/redirects_spec.rb

@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'Settings Migration Redirects' do
+  let!(:user) { Fabricate(:user, password: 'testtest') }
+
+  before { sign_in(user) }
+
+  describe 'Managing redirects' do
+    before { stub_resolver }
+
+    it 'creates and destroys redirects' do
+      visit new_settings_migration_redirect_path
+      expect(page)
+        .to have_title(I18n.t('settings.migrate'))
+
+      # Empty form invalid submission
+      expect { click_on I18n.t('migrations.set_redirect') }
+        .to_not(change { user.account.moved_to_account_id }.from(nil))
+
+      # Valid form submission
+      fill_in 'form_redirect_acct', with: 'new@example.host'
+      fill_in 'form_redirect_current_password', with: 'testtest'
+      expect { click_on I18n.t('migrations.set_redirect') }
+        .to(change { user.reload.account.moved_to_account_id }.from(nil))
+
+      # Delete the account move
+      expect { click_on I18n.t('migrations.cancel') }
+        .to(change { user.reload.account.moved_to_account_id }.to(nil))
+      expect(page)
+        .to have_content(I18n.t('migrations.cancelled_msg'))
+    end
+
+    private
+
+    def stub_resolver
+      resolver = instance_double(ResolveAccountService, call: Fabricate(:account))
+      allow(ResolveAccountService).to receive(:new).and_return(resolver)
+    end
+  end
+end