ruby-on-rails - 如何将哈希变量与 rspec capybara 测试规范一起使用

Question

我的规范文件:

require 'spec_helper'

describe "State Contracts page" do 
  @state_data = {
   :state_slug => 'Alabama', 
   :state_name => 'California'
  }

 before(:each) { visit state_path(:state=>"#{@state_data[:state_slug]}" )}

 it 'should have header' do
   page.should have_content("#{@state_data[:state_name]} Contracts")
 end

# show statistics specification for State Contract
 it "should have #{@state_data[:state_name]} Statistics details" do
    page.should have_content("#{@state_data[:state_name]} Statistics") 
    page.should have_content('Total Obligated Amount')
    page.should have_content('Total Transactions')
    page.should have_content('Total Contractors')
    page.should have_content('Total Contract Recipients')
    page.should have_content('Total Offers')
  end
end

# show State link  
it "should have visible #{@state_data[:state_name]} Links" do
    page.should have_content("#{@state_data[:state_name]} Links")
    assert_equal(true, find_link("Agencies in #{@state_data[:state_name]}").visible?)
    assert_equal(true, find_link("Contractors in "{@state_data[:state_name]}").visible?)
    assert_equal(true, find_link("Contracts in #{@state_data[:state_name]}").visible?)
  end
end

当我运行测试后，我得到了下一个错误:

undefined method `[]' for nil class for "#{@state_data[:state_name]}"

我认为我正在插入哈希变量，但现在不正确。

Answer 1

如果没有在 before 中的某处声明实例变量，则不能在 it block 中使用实例变量。将 @state_data 包裹在 before(:each) block 中，它应该可以工作。

它看起来像下面这样:

before do
  @state_data = {
    :state_slug => 'Alabama', 
    :state_name => 'California'
  }
  visit state_path(:state=>"#{@state_data[:state_slug]}"
end

我的理解是，使用实例变量被认为是一种反模式，您应该考虑使用 let() 或 subject() 来代替

使用 let() 会将其更改为:

let(:state_data) do
  { 
    :state_slug => 'Alabama', 
    :state_name => 'California'
  }
end

before { visit state_path(:state=>"#{state_data[:state_slug]}" }

it 'should have header' do
  page.should have_content("#{state_data[:state_name]} Contracts")
end