ReferenceError: TextEncoder is not defined in Github Actions Jest Script - mongodb

Question

I have an error that's only happening in my Github Actions workflow (when I run my Jest script locally, it's fine). I've only found this SO answer and this one but error still persists. Any thoughts on what to check next?
Here's the error:
> jest server/test/test --config=server/test/jest.config.js
FAIL server/test/test.js
● Test suite failed to run
ReferenceError: TextEncoder is not defined
at Object.<anonymous> (../../node_modules/mongodb-connection-string-url/node_modules/whatwg-url/dist/encoding.js:2:21)
at Object.<anonymous> (../../node_modules/mongodb-connection-string-url/node_modules/whatwg-url/dist/url-state-machine.js:5:34)
Here's my Jest config and script:
jest.config.js
module.exports = {
preset: '#shelf/jest-mongodb'
};
test.js
const dotenv = require('dotenv');
const path = require('path');
process.env = dotenv.config({path: path.resolve(__dirname, '.env')}).parsed;
const request = require('supertest');
const {app, server} = require('../server');
const { MongoClient } = require('mongodb');
const { TextEncoder } = require('util');
global.TextEncoder = TextEncoder;
describe('GET /', () => {
let mongoClient;
beforeAll(async () => {
app.locals.mongoClient = mongoClient = await MongoClient.connect(process.env.MONGODB_URI, { useNewUrlParser: true, useUnifiedTopology: true });;
});
afterAll(async () => {
await mongoClient.close();
server.close();
});
it('responds with path of /', (done) => {
request(app).get('/').expect(JSON.stringify({path: '/'}), done);
});
});
My Github Actions workflow is erroring at the npm run test-server step:
name: cicd
on:
push:
branches: [ master ]
pull_request:
branches: [ master ]
jobs:
build:
runs-on: ubuntu-latest
strategy:
matrix:
node-version: [ 10.x, 12.x, 14.x, 15.x ]
fail-fast: false
steps:
- uses: actions/checkout#v2
- name: Create environment variables
run: |
touch server/test/.env
echo MONGODB_URI=${{ secrets.QA_MONGODB_URI }} >> server/test/.env
- name: Node.js ${{ matrix.node-version }}
uses: actions/setup-node#v2
with:
node-version: ${{ matrix.node-version }}
- run: npm ci
- run: npm run build --if-present
- run: npm run test-server
deploy:
needs: build
runs-on: ubuntu-latest
steps:
- uses: actions/checkout#v2
- uses: akhileshns/heroku-deploy#v3.12.12
with:
heroku_api_key: ${{ secrets.HEROKU_API_KEY }}
heroku_app_name: "my-app-name"
heroku_email: "my-email"

Answer 1

I had the same problem and a just inserted the two lines at the top
global.TextEncoder = require("util").TextEncoder;
global.TextDecoder = require("util").TextDecoder;
reference: ReferenceError: TextEncoder is not defined with mongodb nodes
global.TextEncoder = require("util").TextEncoder;
global.TextDecoder = require("util").TextDecoder;
import { MongoMemoryServer } from 'mongodb-memory-server';
import mongoose from 'mongoose';
let mongod: MongoMemoryServer;
beforeAll(async () => {
const mongod = await MongoMemoryServer.create();
const mongoUri = mongod.getUri();
await mongoose.connect(mongoUri);
});
beforeEach(async () => {
const collections = await mongoose.connection.db.collections();
for (let collection of collections) {
await collection.deleteMany({});
}
});
afterAll(async () => {
await mongod.stop(true);
await mongoose.connection.close();
});