在Tavern 1.0.0中保存变量

Question

我正在使用Tavern测试我的REST端点。基本上，我所做的就是执行一个GET请求，尝试保存响应，然后将该响应的一部分用于后续的更新测试。

# test_.tavern.yaml file

# GET
test_name: Get Rules by ServiceCode
stages:
  - name: Get Rules by a ServiceCode
    request:
      method: GET
      url: http://localhost:9000/record/v1/admin/rules
      params:
        service_code: "ZEL302" #hardcoded
    response:
      status_code: 200
      save:
        $ext:
          function: rule:save_rule_no # saving the results into a variable called "saved_rule_no"
---

# UPDATE
test_name: Update Rule
stages:
  - name: Update a Rule
    request:
      method: PUT
      url: "http://localhost:9000/record/v1/admin/rules/69"
      json:
        ruleNo: !int "{saved_rule_no}" # use the saved variable here
        category: "tavernc"
        identifier: "taverni"
        operator: "taverno"
        value: "tavernv"
        productId: "tavernpid"
        serviceCode: "tavernsc"
        templateNo: 1 #hardcoded
    response:
      status_code: 200

# rule.py file

def save_rule_no(response):
    """
    After creating a Rule, get the Rule's ruleNo field to use for testing update/delete
    """
    ruleNo = response.json()[0]["ruleNo"]
    return Box({"saved_rule_no": ruleNo})

我得到下面的错误，说变量不能被识别。此方法适用于Tavern 0.34.0，但不适用于1.0.0。对于1.0.0，您将如何做到这一点？

scenario/test_.tavern.yaml::Insert Rules PASSED                                                                                                      [ 25%]
scenario/test_.tavern.yaml::Get Rules by ProductId PASSED                                                                                            [ 50%]
scenario/test_.tavern.yaml::Get Rules by ServiceCode PASSED                                                                                          [ 75%]
scenario/test_.tavern.yaml::Update Rule FAILED                                                                                                       [100%]

========================================================================= FAILURES =========================================================================
Format variables:
  saved_rule_no = '???'

Answer 1

Tavern不支持在测试之间使用保存的变量。

保存的变量仅可用于单个测试中的所有阶段。

Answer 2

1.创建一个scope = session的fixture

2. fixture应该返回您将在所有测试中使用的数据

3.在测试中连接fixture

文档：https://tavern.readthedocs.io/en/latest/basics.html#usefixtures