![]() ![]() But i am not understating how to properly use jest. This makes testing with NodeJS/Jest + AWS a great deal simpler compared to having to mock the outputs of each. Simply use this dot-notation name as the service parameter to the mock() and restore() methods: AWS.mock('DynamoDB. How to mock S3 with jest Ask Question Asked 3 years, 4 months ago Modified 1 year, 3 months ago Viewed 38k times Part of AWS Collective 21 I am tryng to code a test for upload. Line 2: the aws-sdk-mock package is imported here. It is possible to mock nested services like DynamoDB.DocumentClient. How? ( Usage) install jest-aws-sdk-mock from NPM npm install jest-aws-sdk-mock -save-dev Use in your Tests Using plain JavaScript const AWSMock = require('jest-aws-sdk-mock') ĪWSMock.mock('DynamoDB', 'putItem', function (params, callback) as any).promise() Uses Jest under the hood to mock the AWS SDK services and their associated methods. I wanted to write unit tests that work without performing network calls to AWS. This is a rewrite of but using jest under the hood instead of sinon.js. Jest has great built-ins for mocking, but mocking aws-sdk properly is quite tricky. ![]() This module was created to help test AWS Lambda functions but can be used in any situation where the AWS SDK needs to be mocked.
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