link to submission preview page in completed emails

spec/system/submission_preview_spec.rb

@@ -0,0 +1,22 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'Submission Preview' do
+  let(:account) { create(:account) }
+  let(:user) { create(:user, account:) }
+  let(:template) { create(:template, account:, author: user) }
+
+  context 'when not submitted' do
+    let(:submission) { create(:submission, template:, created_by_user: user) }
+    let(:submitters) { template.submitters.map { |s| create(:submitter, submission:, uuid: s['uuid']) } }
+
+    before do
+      visit submissions_preview_path(slug: submission.slug)
+    end
+
+    it 'completes the form' do
+      expect(page).to have_content('Not completed')
+    end
+  end
+end