ruby - 无法解决错误 : # received unexpected message :[]= with (:rule_code, 1)

Question

我正在努力解决我在测试以下内容时遇到的上述错误:

def add_rule_code new_rule
  count = list[:multiple_item_rules].count + list[:total_price_rules].count + 1
  new_rule[:rule_code] = count
end

通过以下测试:

  it "adds a unique rule code" do
    item_rule = double( {rule_type: "item", item_code: 001, number_of_items: 2, new_item_price: 8.50} )
    rules.add_rule_code item_rule
    expect(rules.list[:multiple_item_rules][:rule_code]).to eq 1
  end

我收到以下错误消息:

1) Promotional_Rules New rules adds a unique rule code
   Failure/Error: new_rule[:rule_code] = count
     #<Double (anonymous)> received unexpected message :[]= with (:rule_code, 1)
   # ./lib/Promotional_Rules.rb:21:in `add_rule_code'
   # ./spec/promotional_rules_spec.rb:27:in `block (3 levels) in <top (required)>'

我确信这是一个简单的修复，但尽管使用谷歌搜索等我还是无法弄清楚。任何帮助都会很棒。

谢谢

Answer 1

您正在调用 new_rule[:rule_code] 但替身没有响应 :[]。

让它发挥作用的一种方法是:

allow(new_rule).to receive(:[])

参见 RSpec Mocks Method Stubs .

我不知道你为什么要使用双倍。我认为您可能想要使用工厂。