add builder 'replace' button specs

spec/system/template_builder_spec.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'Template Builder' do
+  let(:account) { create(:account) }
+  let(:author) { create(:user, account:) }
+  let(:template) { create(:template, account:, author:, attachment_count: 3, except_field_types: %w[phone payment]) }
+
+  before do
+    sign_in(author)
+  end
+
+  context 'when manage template documents' do
+    before do
+      visit edit_template_path(template)
+    end
+
+    it 'replaces the document' do
+      doc = find("div[id='documents_container'] div[data-document-uuid='#{template.schema[1]['attachment_uuid']}'")
+      doc.click
+
+      expect do
+        wait_for_fetch do
+          doc.find('.replace-document-button').click
+          doc.find('.replace-document-button input[type="file"]', visible: false)
+             .attach_file(Rails.root.join('spec/fixtures/sample-image.png'))
+        end
+      end.to change { template.documents.count }.by(1)
+
+      expect(template.reload['schema'][1]['name']).to eq('sample-image')
+    end
+  end
+end