如何在rspec上測試文件大小（Rails 4 / rspec3）

Question

我想測試一下我的css文件和javascript文件（本地）是否在500kb以下（我想確保在我們開發的任何時候，這些嚴重影響我們前端的文件都保持在一定值以下）。

我正在使用以下代碼，但出現錯誤

/spec/controllers/application_controller_spec.rb

describe 'Sizes of files that significantly impact app frontend are under a certain size' do
    it "should have css files under 500ko " do
      expect( File.size("app/assets/stylesheets/custom.css.scss") ).to be <= 500
    end 

    it "should have javascript filec" do
      expect( File.size("app/assets/stylesheets/custom.css.scss") ).to be <= 500
    end 
  end

但我得到錯誤：

ApplicationController Sizes of files that significantly impact app frontend are under a certain size should have css files under 500ko 
 Failure/Error: expect( File.size("app/assets/stylesheets/custom.css.scss") ).to be <= 500
   expected: <= 500
        got:    15296
 # ./spec/controllers/application_controller_spec.rb:90:in `block (3 levels) in <top (required)>'
 # /home/mathieu/.rvm/gems/ruby-2.0.0-p451@rails3tutorial2ndEd/gems/zeus-0.15.3/lib/zeus/rails.rb:212:in `test'
 # /home/mathieu/.rvm/gems/ruby-2.0.0-p451@rails3tutorial2ndEd/gems/zeus-0.15.3/lib/zeus.rb:148:in `block in command'
 # /home/mathieu/.rvm/gems/ruby-2.0.0-p451@rails3tutorial2ndEd/gems/zeus-0.15.3/lib/zeus.rb:135:in `fork'
 # /home/mathieu/.rvm/gems/ruby-2.0.0-p451@rails3tutorial2ndEd/gems/zeus-0.15.3/lib/zeus.rb:135:in `command'
 # /home/mathieu/.rvm/gems/ruby-2.0.0-p451@rails3tutorial2ndEd/gems/zeus-0.15.3/lib/zeus.rb:50:in `go'
 # -e:1:in `<main>'

我怎么得到這個號碼？ 我應該做某種乘法來將kb轉換為比特還是什么？

編輯

實際上，我需要將500Kb轉換為字節。

Answer 1

對於運營商比較，你需要使用be ：

expect(35).to be >= 20

查看文檔以獲取更多示例。