Node.js Oauth/Zoom API post请求-Mocha集成测试失败，出现400（客户端错误），而应用程序本身似乎正常工作

我无法理解为什么集成测试不能使用下面的代码。该准则的工作原理如下；“makeOauthRequest”函数向Oauth API发出请求以检索访问令牌。“createMeeting”函数接收访问令牌并使用它向Zoom API发出post请求

如果我在应用程序文件本身中调用“createMeeting”函数，调用的调用与在测试文件中的调用相同（使用“createMeeting”（“Please Work API”，“2021-04-26T19:20:00Z”）），它将工作并成功发出post请求。然而，根据下面的测试文件，当我通过Mocha进行相同的调用时，它抛出了一个400错误。有人能帮我理解为什么存在这种差异吗

我已经在测试文件中记录了环境变量，以检查在理解它们时测试是否有问题，但它们似乎没有问题

// Test file

const funcs = require("../auto/autoNeg.js");
const assert = require("chai").assert;
require("dotenv").config({ path : '/Users/frederickgodsell/codefiles/mokapot/auto/.env'});

 describe('Simple integration', function() {
    it('Integration works', async function() {
      const resp = await createMeeting("Please Work API", "2021-04-26T19:20:00Z");
      console.log(resp)
    });
  });

// Fails with 'Error: Request failed with status code 400'

// App file

const axios = require("axios").default;
require("dotenv").config();
const fs = require("fs");


const jsonString = fs.readFileSync(`/Users/frederickgodsell/codefiles/mokapot/refresh.json`);
const fileData = JSON.parse(jsonString);
const refTok = fileData.refresh_token;

const oathOptions = {
  headers: {
    Authorization:
      "Basic " +
      Buffer.from(process.env.ID + ":" + process.env.SECRET).toString("base64"),
  },
  params: {
    grant_type: "refresh_token",
    refresh_token: refTok,
  },
};

makeOauthRequest = async () => {
  try {
    const oauthPostRequest = await axios.post(
      "https://zoom.us/oauth/token",
      {},
      oathOptions
    );
    let accessPlusRefresh = JSON.stringify(
      await oauthPostRequest.data,
      null,
      2
    );
    fs.writeFile(`/Users/frederickgodsell/codefiles/mokapot/refresh.json`, accessPlusRefresh, (error) => {
      if (error) {
        console.log("Error writing file", error);
      } else {
        console.log("JSON file sucessfully updated");
      }
    });
    // console.log(oauthPostRequest.data)
    
    return oauthPostRequest.data;
  } catch (error) {
    console.log(error);
  }
};




createMeeting = async (topic, startTime) => {

  let meetingBody = {
    topic: topic,
    start_time: startTime,
  };

  let response = await makeOauthRequest();
  let accessToken = await response.access_token;

  const meetingOptions = {
    headers: {
      authorization: `Bearer ${await accessToken}`,
      "Content-Type": "application/json",
    },
  };

  if (!topic || !startTime) {
      console.log('Please provide both a topic and a start time')
      return 'Please provide both a topic and a start time'
  }

  try {
    let meetingResponse = await axios.post(
      `${process.env.API_URL}`,
      meetingBody,
      meetingOptions
    );
    console.log(`Meetin booked. UUID : ${meetingResponse.data.uuid}`);
    return meetingResponse;
  } catch (err) {
    console.log(err.response.data);
  }
};


module.exports.createMeeting = createMeeting;
module.exports.makeOauthRequest = makeOauthRequest;
module.exports.oathOptions = oathOptions;
module.exports.refTok = refTok;

// package.json file for good measure

{
  "name": "mokapot",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "mocha -r dotenv/config"
   
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "axios": "^0.21.1",
    "chai": "^4.3.4",
    "dotenv": "^8.2.0",
    "mocha": "^8.3.2",
    "nock": "^13.0.11",
    "sinon": "^9.2.4",
    "supertest": "^6.1.3"
  }
}