Simple HTTP Endpoint Example + Jest tests

This example is based on the Simple HTTP Endpoint example, and adds Jest unit tests to it.

Invoke the function locally

$ sls invoke local -f localGreeting
{
    "statusCode": 200,
    "body": "{\"message\":\"Hello!\"}"
}

Run the tests

Run the tests via yarn:

$ yarn run jest
yarn run v1.7.0
$ /Users/serverless/aws-node-simple-http-endpoint/node_modules/.bin/jest
 PASS  __tests__/handler.test.js
  ✓ correct greeting is generated (5ms)

Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total
Snapshots:   0 total
Time:        1.557s
Ran all test suites.
✨  Done in 2.85s.