fix dynamic u2f fixtures

spec/javascripts/fixtures/u2f.rb

+require 'spec_helper'
+
+describe SessionsController, '(JavaScript fixtures)', type: :controller do
+  include JavaScriptFixturesHelpers
+
+  before(:all) do
+    clean_frontend_fixtures('u2f/')
+  end
+
+  it 'u2f/authenticate.html.raw' do |example|
+    fixture = render_template('u2f/_authenticate.html.haml', locals: {
+      new_user_session_path: "/users/sign_in",
+      params: {},
+      resource_name: "user"
+    })
+    store_frontend_fixture(fixture, example.description)
+  end
+
+  it 'u2f/register.html.raw' do |example|
+    user = build(:user, :two_factor_via_otp)
+
+    fixture = render_template('u2f/_register.html.haml', locals: {
+      create_u2f_profile_two_factor_auth_path: '/profile/two_factor_auth/create_u2f',
+      current_user: user
+    })
+    store_frontend_fixture(fixture, example.description)
+  end
+
+  private
+
+  def render_template(template, **args)
+    controller = ApplicationController.new
+    controller.render_to_string(template: template, layout: false, **args)
+  end
+end

spec/javascripts/fixtures/u2f/authenticate.html.haml

-= render partial: "u2f/authenticate", locals: { new_user_session_path: "/users/sign_in", params: {}, resource_name: "user" }

spec/javascripts/fixtures/u2f/register.html.haml

-- user = FactoryGirl.build(:user, :two_factor_via_otp)
-= render partial: "u2f/register", locals: { create_u2f_profile_two_factor_auth_path: '/profile/two_factor_auth/create_u2f', current_user: user }

spec/javascripts/u2f/authenticate_spec.js

@@ -10,7 +10,7 @@
 
 (function() {
   describe('U2FAuthenticate', function() {
-    fixture.load('static/u2f/authenticate.html.raw');
+    fixture.load('u2f/authenticate.html.raw');
     beforeEach(function() {
       this.u2fDevice = new MockU2FDevice;
       this.container = $("#js-authenticate-u2f");

spec/javascripts/u2f/register_spec.js

@@ -10,7 +10,7 @@
 
 (function() {
   describe('U2FRegister', function() {
-    fixture.load('static/u2f/register.html.raw');
+    fixture.load('u2f/register.html.raw');
     beforeEach(function() {
       this.u2fDevice = new MockU2FDevice;
       this.container = $("#js-register-u2f");