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@shelf/jest-mongodb
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Jest preset to run MongoDB memory server
$ yarn add @shelf/jest-mongodb --dev
Make sure mongodb
is installed in the project as well, as it's required as a peer dependency.
jest.config.js
module.exports = {
preset: '@shelf/jest-mongodb'
};
If you have a custom jest.config.js
make sure you remove testEnvironment
property, otherwise it will conflict with the preset.
jest-mongodb-config.js
module.exports = {
mongodbMemoryServerOptions: {
binary: {
version: '4.0.3',
skipMD5: true
},
autoStart: false
}
};
To use the same database for all tests pass the config like this:
module.exports = {
mongodbMemoryServerOptions: {
instance: {
dbName: 'jest'
},
binary: {
version: '4.0.3',
skipMD5: true
},
autoStart: false
}
};
Library sets the process.env.MONGO_URL
for your convenience
const {MongoClient} = require('mongodb');
describe('insert', () => {
let connection;
let db;
beforeAll(async () => {
connection = await MongoClient.connect(process.env.MONGO_URL, {
useNewUrlParser: true,
useUnifiedTopology: true
});
db = await connection.db();
});
afterAll(async () => {
await connection.close();
});
});
it('should insert a doc into collection', async () => {
const users = db.collection('users');
const mockUser = {_id: 'some-user-id', name: 'John'};
await users.insertOne(mockUser);
const insertedUser = await users.findOne({_id: 'some-user-id'});
expect(insertedUser).toEqual(mockUser);
});
Cache MongoDB binary in CI by putting this folder to the list of cached paths: ./node_modules/.cache/mongodb-memory-server/mongodb-binaries
You can enable debug logs by setting environment variable DEBUG=jest-mongodb:*
beforeEach(async () => {
await db.collection('COLLECTION_NAME').deleteMany({});
});
See this issue for discussion
MIT © Shelf
FAQs
Run your tests using Jest & MongoDB in Memory server
We found that @shelf/jest-mongodb demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 58 open source maintainers collaborating on the project.
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