HttpRunner框架学习3--extract关键字传递参数，url抽取，变量的声明和引用

1.extract关键字传递参数

运行官网api-server.py

在测试步骤（test）中，若需要从响应结果中提取参数，则可使用 extract 关键字。extract 的列表中可指定一个或多个需要提取的参数。

在提取参数时，当 HTTP 的请求响应结果为 JSON 格式，则可以采用.运算符的方式，逐级往下获取到参数值；响应结果的整体内容引用方式为 content 或者 body。

如响应结果为：

{"success": true, "token": "ZQkYhbaQ6q8UFFNE"}

则可以：

extract:
      - token: content.token

example:

- config:
    name: testcase description
    variables: {}

- test:
    name: /api/get-token
    request:
        headers:
            Content-Type: application/json
            User-Agent: python-requests/2.18.4
            app_version: 2.8.6
            device_sn: FwgRiO7CNA50DSU
            os_platform: ios
        json:
            sign: 9c0c7e51c91ae963c833a4ccbab8d683c4a90c98
        method: POST
        url: http://127.0.0.1:5000/api/get-token
    validate:
        - eq: [status_code, 200]
        - eq: [headers.Content-Type, application/json]
        - eq: [content.success, true]
#        - eq: [content.token, baNLX1zhFYP11Seb]
    extract:
      - token: content.token

- test:
    name: /api/users/1000
    request:
        headers:
            Content-Type: application/json
            User-Agent: python-requests/2.18.4
            device_sn: FwgRiO7CNA50DSU
            token: $token
        json:
            name: user1
            password: '123456'
        method: POST
        url: http://127.0.0.1:5000/api/users/1000
    validate:
        - eq: [status_code, 201]
        - eq: [headers.Content-Type, application/json]
        - eq: [content.success, true]
        - eq: [content.msg, user created successfully.]

2.base_url的优化

上述例子中的url，都是host+path格式的，基本test中的host都是一致的，所以可以提取出来，放到config中

注意：base_url是request下的一个参数，所以必须放在request下，否则会报错找不到base_url

- config:
    name: testcase description
    request:
        base_url: http://127.0.0.1:5000 #base_url必须放在request下
    variables: {}

- test:
    name: /api/get-token
    request:
        headers:
            Content-Type: application/json
            User-Agent: python-requests/2.18.4
            app_version: 2.8.6
            device_sn: FwgRiO7CNA50DSU
            os_platform: ios
        json:
            sign: 9c0c7e51c91ae963c833a4ccbab8d683c4a90c98
        method: POST
        url: /api/get-token
    validate:
        - eq: [status_code, 200]
        - eq: [headers.Content-Type, application/json]
        - eq: [content.success, true]
#        - eq: [content.token, baNLX1zhFYP11Seb]
    extract:
      - token: content.token

- test:
    name: /api/users/1000
    request:
        headers:
            Content-Type: application/json
            User-Agent: python-requests/2.18.4
            device_sn: FwgRiO7CNA50DSU
            token: $token
        json:
            name: user1
            password: '123456'
        method: POST
        url: /api/users/1000
    validate:
        - eq: [status_code, 201]
        - eq: [headers.Content-Type, application/json]
        - eq: [content.success, true]
        - eq: [content.msg, user created successfully.]

3.varies变量声明与引用

varies主要用来指定变量，分为test下的varies和config下的varies,config下的变量全局通用，test下的只能局部使用

- config:
    name: testcase description
    request:
        base_url: http://127.0.0.1:5000
    variables:
        username: user1
        password: 123456

- test:
    name: /api/get-token
    request:
        headers:
            Content-Type: application/json
            User-Agent: python-requests/2.18.4
            app_version: 2.8.6
            device_sn: FwgRiO7CNA50DSU
            os_platform: ios
        json:
            sign: 9c0c7e51c91ae963c833a4ccbab8d683c4a90c98
        method: POST
        url: /api/get-token
    validate:
        - eq: [status_code, 200]
        - eq: [headers.Content-Type, application/json]
        - eq: [content.success, true]
#        - eq: [content.token, baNLX1zhFYP11Seb]
    extract:
      - token: content.token

- test:
    name: /api/users/1000
    request:
        headers:
            Content-Type: application/json
            User-Agent: python-requests/2.18.4
            device_sn: FwgRiO7CNA50DSU
            token: $token
        json:
            name: $username
            password: $password
        method: POST
        url: /api/users/1000
    validate:
        - eq: [status_code, 201]
        - eq: [headers.Content-Type, application/json]
        - eq: [content.success, true]
        - eq: [content.msg, user created successfully.]