ruby-on-rails - 使用 Ruby on Rails 和 RSpec 为 helper 编写规范

Question

我一直在为 Controller 和模型编写规范，但我从未编写过辅助规范。我不知道从哪里开始。

我在 application_helper.rb 中有以下片段

  def title(page_title)
    content_for(:title) { page_title }
  end

• 我应该如何编写代码的辅助规范？
• 此外，如果有任何开源 Rails 应用程序可以显示良好的辅助测试/规范，请告诉我。

Answer 1

来自rspec-rails docs on Helper Specs :

Helper specs live in spec/helpers, and mix in ActionView::TestCase::Behavior.

Provides a helper object which mixes in the helper module being spec'd, along with ApplicationHelper (if present).

require 'spec_helper'
describe ApplicationHelper do
  describe "#title" do
    it "displays the title" do
      # helper is an instance of ActionView::Base configured with the
      # ApplicationHelper and all of Rails' built-in helpers
      expect(helper.title).to match /Some Title/
    end
  end 
end