zoukankan html css js c++ java

RSpec shared examples with template methods

It’s pretty common to have multiple tests that are nearly the same.

In one app, we support bidding on both online and hammer auctions (auctions with people physically present). They’re separate controllers but with a lot of shared code and behavior.

We want to test both, but we’d rather not write two almost identical tests if we can help it.

So we’ve been using RSpec shared examples, with the template method patternto account for the differences, and we like it.

Here’s a simplified example:

spec/request/online_bidding_spec.rb

require "spec_helper"
require "support/shared_examples/bidding"

describe "Bidding online" do
  include_examples :bidding

  let(:auction) { FactoryGirl.create(:online_auction) }

  def auction_path
    online_auction_path(auction)
  end
end

spec/request/hammer_bidding_spec.rb

require "spec_helper"
require "support/shared_examples/bidding"

describe "Bidding at hammer auction" do
  include_examples :bidding

  let(:auction) { FactoryGirl.create(:hammer_auction) }

  def auction_path
    hammer_auction_path(auction)
  end
end

spec/support/shared_examples/bidding.rb

shared_examples :bidding do
  it "lets you bid when logged in" do
    log_in  # Implemented somewhere else.
    visit auction_path
    place_bid
    bid_should_be_accepted
  end

  it "doesn't let you bid when not logged in" do
    visit item_path
    place_bid
    bid_should_be_rejected
  end

  def auction_path
    raise "Implement me."
  end

  def place_bid
    fill_in "Bid", with: 123
    click_button "Place bid"
  end

  def bid_should_be_accepted
    page.should have_content("OK! :)")
  end

  def bid_should_be_rejected
    page.should have_content("NO! :(")
  end
end

The only template method here is auction_path . The shared example makes sure, by raising, that it’s overridden in your concrete specs.

查看全文

相关阅读:
PostgreSQL 学习之使用psycopg2 操作之数据库不存在才创建
 终于还是离开这家公司了
 【转载】看完这篇文章，我奶奶都懂了https的原理
 PostgreSQL 函数学习
 Python 工作中比较实用的一些第三方库
 Python 获取对象的属性和方法—dir 函数
 Python 学习之type 函数的用法
 python 异常处理的基本语法
 pdb调试程序
 随机设置爬虫头部headers 信息

原文地址：https://www.cnblogs.com/goody9807/p/5481354.html