rspec shared_context 和 include_context 适用于所有规范

问题描述

我正在尝试定义一些 let 和 before 钩子，通过使用 Rspec 配置块.

I'm trying to define a few let's and before hooks that will run globally for all my specs by including them in a separate file using the Rspec configuration block.

我尝试了类似的东西:

module Helpers
  def self.included(base)
    base.let(:x){ "x" }
    base.before(:all){ puts "x: #{x}" }
  end
end

Rspec.configure{|c| c.include Helpers }

但这并不像预期的那样工作.before(:all) 不仅在每个主要示例组之前运行，而且还运行在每个嵌套组之前.

but this doesn't work as expected. The before(:all) doesn't just run before each main example group, but each nested one as well.

然后我发现了 shared_context它似乎正是我想要的.

Then I found out about shared_context and it appears to be exactly what I want.

然而，我的开放性问题是我无法弄清楚如何在我的ALL 规范之间共享上下文.文档仅在特定规范中引用了 include_context.

My open problem however is that I can't figure out how to share a context amongst ALL of my specs. The docs only reference include_context within a specific spec.

谁能告诉我如何以全局方式实现这种行为?我知道我可以在我的 spec_helper 中定义 global before 钩子，但我似乎无法使用 let.我想要一个地方，我可以定义这两个东西并且不会污染我的规范助手，而只是包含它.

Can anyone tell me how I can achieve this behavior in a global manner? I'm aware that I can define global before hooks in my spec_helper but I can't seem to use let. I'd like a single place that I can define both of these things and not pollute my spec helper, but just include it instead.

推荐答案

我试图重现您的错误，但失败了.

I tried to reproduce your error, but failed.

# spec_helper.rb
require 'support/global_helpers'

RSpec.configure do |config|
  config.include MyApp::GlobalHelpers
end

# support/global_helpers.rb
module MyApp
  module GlobalHelpers
    def self.included(base)
      base.let(:beer) { :good }
      base.before(:all) { @bottles = 10 }
    end
  end  
end

# beer_spec.rb
require 'spec_helper'

describe "Brewery" do

  it "makes good stuff" do
    beer.should be :good
  end

  it "makes not too much bottles" do
    @bottles.should == 10
  end

  context "when tasting beer" do
    before(:all) do
      @bottles -= 1
    end

    it "still produces good stuff" do
      beer.should be :good
    end

    it "spends some beer on degusting" do
      @bottles.should == 9
    end   
  end
end

https://gist.github.com/2283634

当我写类似 base.before(:all) { p 'global before';@bottles = 10 }，我在规范输出中只有一行.

When I wrote something like base.before(:all) { p 'global before'; @bottles = 10 }, I got exactly one line in spec output.

请注意，我没有尝试修改示例中的实例变量，因为 无论如何都行不通(好吧，实际上你可以修改实例变量，如果它是一个散列或数组).而且，即使将嵌套示例组中的before(:all)改为before(:each)，每个示例中仍然有9个瓶子.

Notice that I didn't try to modify instance variables inside an example, because it wouldn't work anyway (well, actually you can modify instance variables, if it's a hash or array). Moreover, even if you change before(:all) in nested example group to before(:each), there will be still 9 bottles in each example.

这篇关于rspec shared_context 和 include_context 适用于所有规范的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！