aws-embedded-metrics-node
supertest
aws-embedded-metrics-node | supertest | |
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7 | 20 | |
242 | 13,553 | |
0.8% | 0.3% | |
5.0 | 5.3 | |
about 1 month ago | 10 days ago | |
TypeScript | JavaScript | |
Apache License 2.0 | MIT License |
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For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
aws-embedded-metrics-node
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๐ Goodbye Cold Starts โค๏ธHello Proactive Initialization
Lamby will now publish CloudWatch Embedded Metrics in the Lamby namespace with a custom dimension for each application's name. Captured metrics include counts for Cold Starts vs. Proactive Initializations. Here is an example running sum of 3 days of data for a large Rails application in the us-east-1 region.
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Question: How to you handle errors in your lambda ?
I was looking into CloudWatch Embedded Metrics - which is a format that converts logs into cloudwatch metrics automatically.
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Lambda Powertools TypeScript is Generally Available
Often when it comes to metrics, we think about CPU, latency and other operational metrics and AWS services usually provide those out of the box. This kind of thinking can be flawed when we end up having to use 3rd parties such as google analytics to infer critical business events. A simpler solution is to have the application emit a metric when a business event (say a customer signup) occurs. We have a few options for doing this: We can use aws-sdk, we can use the aws-embedded-metrics lib and now we can use Powertools Metrics. Which is the best? Let's see.
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Observability Best Practices when running FastAPI in a Lambda
Let's explore the next core utility in Lambda Powertools, the Metrics utility. This utility lets you easily push metrics to CloudWatch by taking care of all the necessary boilerplate. It works asynchronously by using Amazon CloudWatch Embedded Metrics Format, by logging the metrics to stdout. It also aggregates all metrics from each invocation to save on the number of calls to CloudWatch.
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How to report CloudWatch metrics without AWS SDK
To make it easier to create such an object, AWS has provided libraries for Node.js, Python, Java, and .NET. The above example using the AWS SDK can now be written as follows:
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First Look at Lambda Powertools TypeScript
Custom metrics have a pricing structure which can be expensive. Embedded Metrics Format can help manage the cost and is supported by Lambda Powertools TypeScript. Again, the docs here are pretty good, so no need for me to break it down. Instead let's look at the experience. I've added a custom metric of "collectionSuccess" to my collectionSuccess function. In my hypothetical app, some payments wind up in collections and here I'm marking whether or not the collection resulted in a payment.
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How To Debug AWS Lambda: A Detailed Overview
You can use metrics to aid debugging by adding them to your dashboards that we talked about earlier. Itโs also possible to add custom metrics, and there are many libraries and tools (e.g. node, python, etc) which can help you do this.
supertest
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Express API Testing
Supertest is quite popular and easy to use test tool, you can do integration and E2E test as well, you just need to pass it the server instance or a string to make a request and assert over the response.
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How can I test an Express application through a terminal?
If the latter, there are a bunch of different options for writing automated tests. One popular way is using Jest to run your tests. If you're trying to test the backend end-to-end flow, you could use Supertest to make requests and assert on the responses.
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Ever hear of anyone doing headless functional testing with Jest?
I did something similar with a full stack Typescript project, using supertest and node-fetch. It was nice.
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๐ NodeJS + Ts.ED + TypeScript + Clean Architecture Template
Unit, Integration and E2E tests using Jest and Supertest
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Jest testing custom middleware
This is why integration tests > unit tests. I really hate mocking and I never bother testing individual units that don't affect how users use my app and code. In your case, I'd just use something like supertest to test this functionality e2e.
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Hi im having trouble building my api tests
Yes, but when every function handler is separate from the router, then you can use node-mocks-http to test each handler, to test the router is simpler to use supertest to write integration tests, for E2E tests I personally recommend [pactum](pactumjs.github.io/)
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Booking Typescript API with Express, typeORM and Postgres
Simple booking api attempt with Typescript, Express, TypeORM and Postgres. Testing with Jest & Supertest.
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Patterns and Anti-patterns in Node.js
In a Node.js application, writing API tests is a good start. They provide more coverage than unit testing. You can use frameworks like Supertest, Jest, or any other library that provides a high-level abstraction for testing APIs.
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Testing Node.js/Express app + MongoDB with jest and supertest
supertest npm package that helps test HTTP
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How to test APIs??
If you want to write integration tests - https://jestjs.io - https://github.com/visionmedia/supertest
What are some alternatives?
deno-lambda - A deno runtime for AWS Lambda. Deploy deno via docker, SAM, serverless, or bundle it yourself.
pactum - REST API Testing Tool for all levels in a Test Pyramid
middy - ๐ต The stylish Node.js middleware engine for AWS Lambda ๐ต
superagent - Ajax for Node.js and browsers (JS HTTP client). Maintained for @forwardemail, @ladjs, @spamscanner, @breejs, @cabinjs, and @lassjs.
aws-embedded-metrics-dotnet - Amazon CloudWatch Embedded Metric Format Client Library
Cypress - Fast, easy and reliable testing for anything that runs in a browser.
docker-lambda - Docker images and test runners that replicate the live AWS Lambda environment
frisby - Frisby is a REST API testing framework built on Jest that makes testing API endpoints easy, fast, and fun.
aws-embedded-metrics-python - Amazon CloudWatch Embedded Metric Format Client Library
serverless-offline - Emulate AWS ฮป and API Gateway locally when developing your Serverless project
cdk-async-testing-example
request - ๐๐พ Simplified HTTP request client.