ruby-on-rails - 使用 RSpec 在 Rails 引擎中测试代码

我正在尝试做一些看似简单但事实证明相当困难的事情。

我想使用 RSpec 为我放在 Rails 引擎的 lib 目录中的类编写测试。

以下是我正在使用的步骤:

rails plugin new mygem -T --mountable --full --dummy-path=spec/dummy

然后我 cd mygem; vim mygem.gemspec
我将以下行添加到 mygem.gemspec:

s.add_development_dependency "rspec-rails"

我运行 bundle install; rails generate rspec:install
然后我编辑 ~/mygem/lib/mygem/engine.rb 添加以下内容:

module Mygem
  class Engine < ::Rails::Engine
    isolate_namespace Mygem

    config.generators do |g|
      g.test_framework :rspec
    end
  end
end

我在lib目录下创建了一个非常简单的类，~/mygem/lib/mygem/something.rb
并添加以下内容:

module Mygem
  class Something
    def hi
      "hi"
    end
  end
end

创建一个测试文件 ~/mygem/spec/something_spec.rb
然后添加以下内容:

require 'rails_helper'

describe Mygem::Something do
  it 'says hi' do
    s = Mygem::Something.new
    expect(s.hi).to eq('hi')
  end
end

繁荣，我得到以下输出:

rspec
~/Documents/mygem/spec/rails_helper.rb:3:in `require': cannot load such file -- ~/Documents/mygem/config/environment (LoadError)
  from ~/Documents/mygem/spec/rails_helper.rb:3:in `<top (required)>'
  from ~/Documents/mygem/spec/something_spec.rb:1:in `require'
  from ~/Documents/mygem/spec/something_spec.rb:1:in `<top (required)>'
  from ~/.rvm/gems/ruby-2.2.2/gems/rspec-core-3.3.2/lib/rspec/core/configuration.rb:1327:in `load'  from ~/.rvm/gems/ruby-2.2.2/gems/rspec-core-3.3.2/lib/rspec/core/configuration.rb:1327:in `block in load_spec_files'
  from ~/.rvm/gems/ruby-2.2.2/gems/rspec-core-3.3.2/lib/rspec/core/configuration.rb:1325:in `each'
  from ~/.rvm/gems/ruby-2.2.2/gems/rspec-core-3.3.2/lib/rspec/core/configuration.rb:1325:in `load_spec_files'
  from ~/.rvm/gems/ruby-2.2.2/gems/rspec-core-3.3.2/lib/rspec/core/runner.rb:102:in `setup'
  from ~/.rvm/gems/ruby-2.2.2/gems/rspec-core-3.3.2/lib/rspec/core/runner.rb:88:in `run'
  from ~/.rvm/gems/ruby-2.2.2/gems/rspec-core-3.3.2/lib/rspec/core/runner.rb:73:in `run'
  from ~/.rvm/gems/ruby-2.2.2/gems/rspec-core-3.3.2/lib/rspec/core/runner.rb:41:in `invoke'
  from ~/.rvm/gems/ruby-2.2.2/gems/rspec-core-3.3.2/exe/rspec:4:in `<top (required)>'
  from ~/.rvm/gems/ruby-2.2.2/bin/rspec:23:in `load'
  from ~/.rvm/gems/ruby-2.2.2/bin/rspec:23:in `<main>'
  from ~/.rvm/gems/ruby-2.2.2/bin/ruby_executable_hooks:15:in `eval'
  from ~/.rvm/gems/ruby-2.2.2/bin/ruby_executable_hooks:15:in `<main>'

关于我可能做错了什么的任何提示？

提前致谢!

最佳答案

看起来您的 rails_helper 正在寻找要加载的 environment.rb 文件，该文件在 Rails 引擎中不存在。但是，它确实存在于您的虚拟应用程序中，这正是 RSpec 所针对的。

尝试将其添加到 rails_helper 文件的顶部:

require File.expand_path("../dummy/config/environment.rb", __FILE__)

关于ruby-on-rails - 使用 RSpec 在 Rails 引擎中测试代码，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/32082637/