fast-check
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fast-check | loadtest | |
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21 | 8 | |
4,071 | 2,531 | |
- | - | |
9.8 | 8.0 | |
4 days ago | 26 days ago | |
TypeScript | JavaScript | |
MIT License | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
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.
fast-check
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The 5 principles of Unit Testing
Libraries like JSVerify or Fast-Check offer essential tools to facilitate property-based testing.
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How to Survive Your Project's First 100k Lines
Strong agree!
For JavaScript, I suggest folks check out fast-check [0] and this introduction to property-based testing that uses fast-check [1].
This is broadly useful, but one specific place I've found it helpful was to check redux reducers against generated lists of actions to find unchecked edge cases and data assumptions.
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[AskJS] Should I be generating random data for parameters when unit testing?
There's a library for exactly that: FastCheck.
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Integrate Jest and fast-check together
It makes @fast-check/jest, the best option to integrate Jest and fast-check, as it provides an abstraction over both to ease their mutual integration.
- I Created an API to Generate Mock Information
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Generating dummy entities with random data for tests based on types
The closest that I know of (and I have not used this) is zod-fast-check. It generates fast-check “arbitraries” (test data generators) for property-based testing based on zod schemas. Of course, this requires that you use zod to define your types, which has some downsides. Fortunately there is another tool, ts-to-zod, (which I also have not used) which will codegen zod schemas based on TS type definitions. If you thread these four libraries together you should end up with the ability to write random tests on generated data with very little overhead. In theory.
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In praise of property-based testing (2019)
I've been aware of property-based testing for a number of years now, but never had a good opportunity to give it a try. Then the past year I had a piece of serialisation/de-serialisation code, which was the perfect opportunity for a rather simple property-based test. That gave me the hang of it, and found two (minor, but still) bugs.
Then recently I had a fairly larger, more error prone piece of work that lend itself very well to property-based testing, and it's been a godsend. It helped me discover a number of bugs, this time with the risk of causing privilege escalation. And since the proptests started succeeding reliably, I've been very confident that a rather complex piece of code now actually does what it's supposed to.
If you're working in JavaScript, I can recommend fast-check [1].
Another interesting approach, that I haven't yet tried, is Quickstrom [2], basically Puppeteer for proptests. It opens a webpage in a browser, performs some random interactions (pressing buttons, entering data, etc.), and then verifies that properties you specified still hold.
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Fastcheck: Property based testing for JavaScript and TypeScript
The about says:
Property based testing framework for JavaScript (like QuickCheck) written in TypeScript
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Effective Property-Based Testing
For JS and TypeScript, the best property testing library I've encountered so far is fast-check https://github.com/dubzzz/fast-check
loadtest
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Optimize Node.js performance with clustering
For benchmarking, I will use apache bench. We can also use loadtest which has similar functionality.
To load test our Node.js servers with and without clustering, we will use the Vegeta load testing tool. Other options can be the loadtest npm package or the Apache benchmark tool as well. I find Vegeta easier to install and use because it is a Go binary, and the precompiled executables are seamless to install and get started.
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Cloudflare & Fauna: A Peek Into Performance
When I throw loadtest on it, I got this:
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How to push ten thousand requests for load testing?
I dont want to pay for aws. I was trying to do it locally. I am using this module : https://www.npmjs.com/package/loadtest but my computer does not go over 100 rps. Why is that?
I used https://www.npmjs.com/package/loadtest but my computer does not go over 100 rps. Why is that? I have a pretty good gaming computer.
What are some alternatives?
Unexpected - Unexpected - the extensible BDD assertion toolkit
mocha - ☕️ simple, flexible, fun javascript test framework for node.js & the browser
jest - Delightful JavaScript Testing.
tape - tap-producing test harness for node and browsers
trevor - 🚦 Your own mini Travis CI to run tests locally
AVA
testen - :heavy_check_mark: Run tests for multiple versions of Node.js in local env.
test-each - 🤖 Repeat tests. Repeat tests. Repeat tests.
toxy - Hackable HTTP proxy for resiliency testing and simulated network conditions
volkswagen - :see_no_evil: Volkswagen detects when your tests are being run in a CI server, and makes them pass.
nyc - the Istanbul command line interface