node.js - 在 NodeJS 中运行 Postman Newman 时通过测试修改环境

Question

我在 Node 脚本中运行 Newman。该集合具有环境变量，例如 {{claimNum}}，它会随着测试的每个帖子而递增。

示例:

我有这个集合请求正文

 <ClaimIdentification>
      <company>0001</company>
      <office>100</office>
      <claimNum>{{claimNum}}</claimNum>
 </ClaimIdentification>

并且在全局环境 JSON:

  {
  "enabled": true,
  "key": "claimNum",
  "value": "15200",
  "type": "text"
},

集合有这个测试:

pm.globals.set("claimNum", + pm.globals.get("claimNum") + 1);

但是当在脚本中运行时，global.json 文件不会被修改并且“值”会保持不变。当在桌面应用程序中运行相同的参数时，它会起作用。

是否有解决方案，是否可行？

更新 1:

这是 Newman 脚本:

  collection: require('${__dirname}/ThirdServiceInjured.json'),
  reporters: 'json',
  globals: require('${__dirname}/globals.json')

}).on('done', function (err, summary) {
  if (err || summary.error) {
      console.error('>>> ERROR - Collection run failed.');
  }
  else {
    console.log(success('Collection run completed:'));  
    console.log(summary.run.executions[0].response.text());
  }
});

更新 2:

使用此脚本但仍未覆盖环境:

const newman = require('newman'); // require newman in your project
const fs = require('fs');
const envName = '${__dirname}/environment_qbe600.json';
const env = require('${__dirname}/environment_qbe600.json');

newman.run({
  collection: require('${__dirname}/ThirdServiceInjured.json'),
  reporters: 'cli',
  environment: envName,
  iterationCount: 3

}).on('done', function (err, summary) {
  if (err || summary.error) {
      console.error('>>> ERROR - Collection run could failed.');
}
else {
  const newmanValue = summary.environment.values.members[0].value;
  env.values[0].value = newmanValue;
  console.log(summary.run.executions[0].response.text());
  fs.writeFile(envName, JSON.stringify(env, null, 2), function (err) {
    if (err) return
  })
}
});

更新 3:

这是环境:

{
  "id": "ecabb925-829e-69f8-2348-f71dc76c0e87",
  "name": "Test",
  "values": [
    {
      "enabled": true,
      "key": "host",
      "value": "${___server}",
      "type": "text"
    },
    {
      "enabled": true,
      "key": "company",
      "value": "0001",
      "type": "text"
    },
    {
      "enabled": true,
      "key": "claimNbr",
      "value": "14600",
      "type": "text"
    },
    {
      "enabled": true,
      "key": "dni",
      "value": "150",
      "type": "text"
    },
    {
      "enabled": true,
      "key": "cost",
      "value": "107000",
      "type": "text"
    },
    {
      "enabled": true,
      "key": "testNum",
      "value": "157",
      "type": "text"
    }
  ],
  "timestamp": 1515789551332,
  "_postman_variable_scope": "environment",
  "_postman_exported_at": "2018-01-12T20:39:14.795Z",
  "_postman_exported_using": "Postman/5.5.0"

以及集合中的测试部分:

"event": [
    {
        "listen": "test",
        "script": {
            "type": "text/javascript",
            "exec": [
                "pm.environment.set(\"claimNbr\", +pm.environment.get(\"claimNbr\") + 1);",
                "pm.environment.set(\"testNum\", +pm.environment.get(\"testNum\") + 1);",
                "pm.environment.set(\"dni\", +pm.environment.get(\"dni\") + 1);",
                "pm.environment.set(\"cost\", +pm.environment.get(\"cost\") + 1000);"
            ]
        }
    }
],

Answer 1

查看了 Postman Github account 上的以下近期问题

如果您将 global 变量更改为 environment 变量，这样您就可以在每次运行时看到更新后的值。我只是将您的 test 代码更改为 environment 而不是 global。

pm.environment.set("claimNum", + pm.environment.get("claimNum") + 1)

我创建了一个基本 Node 脚本来使用从 Postman 导出的集合和环境文件运行 Newman:

var newman = require('newman')

newman.run({
    collection: `${__dirname}/default_collection.json`,
    environment: `${__dirname}/default_environment.json`,
    reporters: 'cli',
    iterationCount: 10
  }, (err) => {
    if (err) { throw err }
  })

我在 newman 脚本中引用的两个文件:

default_collection.json

{
    "info": {
        "name": "Test_Collection",
        "_postman_id": "d08f1b36-591a-f25f-aaaa-4368ca966fb4",
        "description": "",
        "schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json"
    },
    "item": [
        {
            "name": "Test_Request",
            "event": [
                {
                    "listen": "test",
                    "script": {
                        "id": "068b6634-e310-46e9-86fc-265376c65ff6",
                        "type": "text/javascript",
                        "exec": [
                            "console.log(pm.environment.get('claimNum'))"
                        ]
                    }
                }
            ],
            "request": {
                "method": "POST",
                "header": [
                    {
                        "key": "Content-Type",
                        "value": "application/json"
                    }
                ],
                "body": {
                    "mode": "raw",
                    "raw": "{\n\t\"id\": {{claimNum}}\n}"
                },
                "url": {
                    "raw": "localhost:3000/test",
                    "host": [
                        "localhost"
                    ],
                    "port": "3000",
                    "path": [
                        "test"
                    ]
                },
                "description": ""
            },
            "response": []
        }
    ],
    "event": [
        {
            "listen": "prerequest",
            "script": {
                "id": "4c1d562f-e4d5-4017-8f25-48ac0b6aa3fc",
                "type": "text/javascript",
                "exec": [
                    ""
                ]
            }
        },
        {
            "listen": "test",
            "script": {
                "id": "026c029e-a427-4624-b196-3d8982a103f1",
                "type": "text/javascript",
                "exec": [
                    "pm.environment.set(\"claimNum\", + pm.environment.get(\"claimNum\") + 1)"
                ]
            }
        }
    ]
}

default_environment.json

{
  "id": "539073e6-adab-f812-95b0-82d4d82ce4b2",
  "name": "test_environment",
  "values": [
    {
      "enabled": true,
      "key": "claimNum",
      "value": "9",
      "type": "text"
    }
  ],
  "timestamp": 1515782483636,
  "_postman_variable_scope": "environment",
  "_postman_exported_at": "2018-01-12T18:42:04.661Z",
  "_postman_exported_using": "Postman/5.5.0"
}

我将 iterationCount: 10 添加到脚本中，以便我可以看到每次迭代时 claimNum 的增加。

在 Postman 中，我添加了一个简单的 console.log() 以在每次测试运行时写出 claimNum - 您可以在上图中看到输出。

console.log(pm.environment.get('claimNum'))

我的请求正文使用 JSON，但 {{claimNum}} 与 XML 的工作方式相同，就像您的示例中一样。

这是解决问题的一个方法，但因为它没有使用 global 变量，而且我不确定您的要求 - 这可能不是您想要的。

---

更新 1

根据您的用例 - 可以更新环境文件以显示上次运行的值，并可以在下一个请求中使用该值 - 这样就不会针对静态文件中的相同值重复运行测试.运行以下代码将运行测试，然后更新 default_environment.json 文件中的值。

const newman   = require('newman')
const fs       = require('fs');
const fileName = `${__dirname}/default_environment.json`;
const file     = require(fileName);

newman.run({
    collection: `${__dirname}/default_collection.json`,
    environment: `${__dirname}/default_environment.json`,
    reporters: 'cli',
    iterationCount: 3
}).on('done', function (err, summary) {
  if (err || summary.error) {
    console.error('>>> ERROR - Collection run failed.');
  }
  else {
    const newmanValue = summary.environment.values.members[0].value
    file.values[0].value = newmanValue

    fs.writeFile(fileName, JSON.stringify(file, null, 2), function (err) {
      if (err) return
    })
  }
}) 

我的 environment 文件在测试运行后看起来像这样:

{
  "name": "test_environment",
  "values": [
    {
      "enabled": true,
      "key": "claimNum",
      "value": 19,
      "type": "text"
    }
  ]
}

---

更新 2

使用新信息再次修改代码，这对我来说在本地有效:

Newman 运行脚本

const newman  = require('newman')
const fs      = require('fs')
const envName = `${__dirname}/default_environment.json`
const env     = require(envName)

newman.run({
  collection: require(`${__dirname}/default_collection.json`),
  reporters: 'cli',
  environment: envName,
  iterationCount: 3

}).on('done', function (err, summary) {
  if (err || summary.error) {
      console.error('ERROR - Collection run could failed')
}
else {
  const claimNbr  = summary.environment.values.members[0].value
  const testNum   = summary.environment.values.members[1].value
  const dni       = summary.environment.values.members[2].value
  const cost      = summary.environment.values.members[3].value

  env.values[0].value = claimNbr
  env.values[1].value = testNum
  env.values[2].value = dni
  env.values[3].value = cost

  fs.writeFile(envName, JSON.stringify(env, null, 2), function (err) {
    if (err) return
  })
  console.log('Collection run complete') 
}
})

Collection 文件中的测试部分

    "name": "Test_Request",
    "event": [
        {
            "listen": "test",
            "script": {
                "id": "a407e1e2-4961-4c65-af1b-22190b1ab0cc",
                "type": "text/javascript",
                "exec": [
                    "pm.environment.set(\"claimNbr\", + pm.environment.get(\"claimNbr\") + 1)",
                    "pm.environment.set(\"testNum\", + pm.environment.get(\"testNum\") + 1)",
                    "pm.environment.set(\"dni\", + pm.environment.get(\"dni\") + 1)",
                    "pm.environment.set(\"cost\", + pm.environment.get(\"cost\") + 1000)",
                    "",
                    "console.log(JSON.stringify(pm.response.json()))"
                ]
            }
        }
    ]

Postman 请求正文

脚本运行和更新环境文件