serverless-appsync-lambda-httpresource-example

This sample repository shows how to setup AWS AppSync that exposes two GraphQL queries:

• getWeatherWithHTTPResource which gets weather information from https://wttr.in using a HTTP Resource
• getWeatherWithLambda which gets weather information from https://wtter.in using a Lambda which then executes the request

This repository also shows different ways of testing a AWS AppSync:

• At unit level for the lambda handler defined
• At the mapping template level, by testing directly the VTL defined maps with @conduitvc/appsync-emulator-serverless/vtl
• At AppSync level using the helper createAppSync available in @conduitvc/appsync-emulator-serverless/jest

Notes:

• Created dynamodb-local.js to start DynamoDB locally before we run the tests so the tests don't timeout since DynamoDB takes a while to start for the first time
• Created jest-utils to provide utils for testing the VTL files, loadVTL which will load the VTL file and renderVTL which will try to render the VTL provided with the function vtl available ij @conduitvc/appsync-emulator-serverless/vtl

Tech stack

Serverless

https://serverless.com/

The Serverless Framework is an open-source CLI for building and deploying serverless applications. With over 6 million deployments handled, the Serverless Framework is the tool developers trust to build cloud applications.

Build Setup

Using Docker

# Build Dockerfile
$ yarn docker:build

# graphql will run on http://localhost:62222/graphql
$ yarn docker:dev

# Running tests
$ yarn docker:test

# Running tests with watch
$ yarn docker:test:dev

Running locally

# install dependencies
$ yarn

# graphql will run on http://localhost:62222/graphql
$ yarn run dev

Testing

curl 'http://localhost:62222/graphql' -H 'Accept-Encoding: gzip, deflate, br' -H 'Content-Type: application/json' -H 'Accept: application/json' -H 'Connection: keep-alive' -H 'DNT: 1' -H 'Origin: http://localhost:3001' -H 'x-api-key: ABC123' --data-binary '{"query":"{ getWeatherWithHTTPResource }"}' --compressed

curl 'http://localhost:62222/graphql' -H 'Accept-Encoding: gzip, deflate, br' -H 'Content-Type: application/json' -H 'Accept: application/json' -H 'Connection: keep-alive' -H 'DNT: 1' -H 'Origin: http://localhost:3001' -H 'x-api-key: ABC123' --data-binary '{"query":"{ getWeatherWithLambda }"}' --compressed