With the Global Setup/Teardown and Async Test Environment APIs, Jest can work smoothly with DynamoDB.
Jest DynamoDB provides all required configuration to run your tests using DynamoDB.
@shelf/jest-dynamodb
yarn add @shelf/jest-dynamodb --dev
{ "preset": "@shelf/jest-dynamodb" }
jest-dynamodb-config.js
and define DynamoDB tablesSee Create Table API
module.exports = { tables: [ { TableName: `files`, KeySchema: [{AttributeName: 'id', KeyType: 'HASH'}], AttributeDefinitions: [{AttributeName: 'id', AttributeType: 'S'}], ProvisionedThroughput: {ReadCapacityUnits: 1, WriteCapacityUnits: 1}, }, // etc ], };
const {DocumentClient} = require('aws-sdk/clients/dynamodb'); const isTest = process.env.JEST_WORKER_ID; const config = { convertEmptyValues: true, ...(isTest && { endpoint: 'localhost:8000', sslEnabled: false, region: 'local-env', }), }; const ddb = new DocumentClient(config);
it('should insert item into table', async () => { await ddb .put({TableName: 'files', Item: {id: '1', hello: 'world'}}) .promise(); const {Item} = await ddb.get({TableName: 'files', Key: {id: '1'}}).promise(); expect(Item).toEqual({ id: '1', hello: 'world', }); });
There's no need to load any dependencies.
See documentation for details.
© 2020 Facebook, Inc.
Licensed under the MIT License.
https://jestjs.io/docs/en/dynamodb