Unit Testing in Serverless - tutorial including DynamoDB

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Unit Testing in Serverless - tutorial including DynamoDB

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Complete Coding - Master AWS Serverless

4 жыл бұрын

In this video we'll learn about unit testing in Serverless and how we can also unit test interactions with AWS services such as DynamoDB
Code for starting this video:
github.com/SamWSoftware/Serve...
Code for completed Lesson
github.com/SamWSoftware/Serve...

Пікірлер: 33

@PeteWhelan 4 жыл бұрын

Great video, thanks again Sam! Enjoyed this tutorial.

@CompleteCoding 4 жыл бұрын

My pleasure!

@shwenansuwai2481 4 жыл бұрын

Love your channel. Thank you for the lessons.

@CompleteCoding 4 жыл бұрын

Glad you like them!

@flaviomovil 2 жыл бұрын

Thanks for this video Sam!! Was great! :) help me a lot!

@CompleteCoding 2 жыл бұрын

Glad it helped you out

@0301311 3 жыл бұрын

Testing for S3 is missing !

@CompleteCoding 3 жыл бұрын

With S3 there isn't a library that I've found that works as well as this one does for dynamo. Since these are meant to be unit testing I would mock the s3 service to create the tests.

@JeanYvesP 4 жыл бұрын

That is another great video!

@CompleteCoding 4 жыл бұрын

Thanks! The next one on integration testing serverless Lambdas will be coming out shortly

@neosarchizo 4 жыл бұрын

Thanks for good video again!

@CompleteCoding 4 жыл бұрын

My pleasure!

@2ederson 3 жыл бұрын

Hi! Quick question, using this same code or a similar one, If I wanted to use jest testing WITHOUT mocking the Database, using the real DynamoDB, does the configuration change or any additional changes to perform? I'm currently trying to make a change in the project, from having the DynamoDB configuration in Handler to a proper Dynamo.js file, but I seem to get the error: UnrecognizedClientException: The security token included in the request is invalid. I'm not sure if this stems from handler reading the dynamo configuration from serverless.yml, and the Dynamo.js file does not read it Any answer is appreciated.

@CompleteCoding 3 жыл бұрын

You would have to change the configuration in Dynamo.js so that it uses the correct AWS credentials to access the real database when running a test. Add something like this to the top of the Dynamo.js file in the (isTest) block. This uses the credentials for the profile when running the lambda. var credentials = new AWS.SharedIniFileCredentials({profile: 'work-account'}); AWS.config.credentials = credentials;

@davidwalters76 3 жыл бұрын

basically all your vids 👍

@CompleteCoding 3 жыл бұрын

Thanks David. Glad they're helpful

@PeteWhelan 4 жыл бұрын

Note to anyone using this tutorial having problems running Jest: Install Jest Globally AS WELL AS npm install --save-dev jest.

@CompleteCoding 4 жыл бұрын

Nice spot Pete

@cristianecheverria3995 4 жыл бұрын

Or instead of adding JEST Globally, you can add a script to package.json like "test": "jest" And then just run "npm run test"

@JorgeNunez22 3 жыл бұрын

Why Skipped the S3 unit tests???

@CompleteCoding 3 жыл бұрын

With S3 there isn't a library that I've found that works as well as this one does for dynamo. Since these are meant to be unit testing I would mock the s3 service to create the tests.

@karthikr7038 3 жыл бұрын

I am getting error while executing jest with @shelf/jest-dynamodb added in jest.config.js file.

@CompleteCoding 3 жыл бұрын

Try following the previous video on serverless offline first. There may be some steps in that that are needed to get jest to work.

@karthikr7038 3 жыл бұрын

@@CompleteCoding java.lang.NoClassDefFoundError: org/apache/commons/cli/ParseException

@rendelllasola66 3 жыл бұрын

You can use jest-dynalite which is a fork of jest-dynamodb as replacement because it doesn't require Java.

@CompleteCoding 3 жыл бұрын

@@rendelllasola66 Thanks for point that out

@shahidabbas2932 2 жыл бұрын

Hi, Sir i want to contact you .

@CompleteCoding 2 жыл бұрын

My details are in the 'about' section of the channel page

@dhanwadc 4 жыл бұрын

First view

@CompleteCoding 4 жыл бұрын

thanks Dhanwa

@adityanair3566 2 жыл бұрын

Dynamo intialisation file is written in TS. To compile ts file in jest, I read you need to include 'ts-jest' as preset. But to use dynamo local, we need to use "@shelf/jest-dynamodb" as preset. How can I add two presets in one jest config file? Please help me out. Great video btw!

@karthikr7038 3 жыл бұрын

java.lang.NoClassDefFoundError: org/apache/commons/cli/ParseException

@CompleteCoding 3 жыл бұрын

This sounds like you haven't got the Java processor required. If you follow this video on setting up serverless-offline it will show you how to install this. Then it should all work. kzfaq.info/get/bejne/q9KPa5iby7OUn6M.html