miragejs
Nock
miragejs | Nock | |
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17 | 21 | |
5,281 | 12,527 | |
0.2% | 0.2% | |
4.3 | 8.3 | |
13 days ago | 11 days ago | |
JavaScript | JavaScript | |
MIT License | MIT License |
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miragejs
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Exploring Mirage JS: Simplifying API Mocking in React Development
Mirage JS GitHub Repository
- Mock server
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The Definitive Guide to Make API Calls in React
For the styles, I'll be using TailwindCSS. To simulate API requests Mirage JS will be used, which is a very easy to use and useful API mocking library. To call this API, we're going to use Fetch.
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e2e testing setup and thoughts on Playwright
during development we use mirage JS to spin up an in-browser mock server which returns mock data for any API endpoints not currently implemented by the real backend. during integration testing we configure this server to return mock data for all API endpoints in the system, giving us a fixed environment against which our tests can run. test suites can be run in parallel since each time a playwright page is opened a new copy of the webapp, and thus a new copy of the mock server, is launched. these integration tests run whenever a frontend PR is opened or updated.
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How do you practice with React without setting up your own backend?
Mirage JS is specifically built for this purpose as well. It‘s a frontend JavaScript library meant for mocking backend APIs. https://miragejs.com/
We use miragejs https://miragejs.com/
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Do tests without seeing the code!
The best case scenario you would be using something like MirageJS, MSW, or even JSON Server, but mocking fetch is always an option.
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Mock server while developing
Mirage JS is pretty useful and allows you to create complex testing scenarios with its embedded db. Useful when you have relationships between your models.
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Mocking API calls in React Tests with Nock
Mirage JS: Mirage JS is an API mocking library that lets you build, test, and share a complete working JavaScript application without having to rely on any backend services.
- How to correctly mock node-fetch?
Nock
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Contract Testing?
So, why would you want a REAL server to mock request/reponses? You have a lot of intercepts today that sit on the network layer and you can define things like "If you send request to that endpoint, with that json, please return that Status" (for NodeJS example, Nock - https://github.com/nock/nock)
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I made wirepig, a simple way to mock HTTP and TCP dependencies in tests.
That said, folks seem to like "recording" features in these sorts of tools (Ruby's VCR, nock, etc), so maybe there's a future where I add something similar. I've always just found the ergonomics of those features awkward to deal with, especially having to flip back and forth between tests and fixtures files to figure out what's wired to what, but maybe there's a clean solution... perhaps a "live request" mode that just prints mock code snippets of request/response pairs passing through your app.
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Is there a better way to mock an axios call?
While not mocking per say I usually use nock for http calls. You can use nock.recorder.rec() to capture the http call to play back during test, That way you are always using "live" code but not making real calls to servers.
- How do you practice with React without setting up your own backend?
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OSD600 - Telescope - Testing for feed URLs
I looked at the service which is used to get the feed URLs from a blog URL and noticed it takes the html response of the blog URL and gets the links ( tags) by checking the type attribute value against a list of valid feed values. So, I decided to use a similar approach by getting the html response for a provided URL and checking the Content-Type header against a list of valid MIME types for a feed. I ended up updating the logic to test if a URL is a feed URL, returning it if true. If the URL is found to not be a feed URL, it would try to get the feed URLs assuming the URL is a blog URL. I tested and confirmed that the new logic worked for both blog and feed URLs. Then, I added some tests for the new function I added to test for a feed URL. Testing this ended up being simpler than I expected as all I had to do was mock the response of a test url (using nock), and then check if the function returned the correct boolean value for a url. I created a PR and noticed that some of the tests in another file were now failing. While I was investigating this, I got a review on my PR, requesting me to add another test to the file which had the failing tests. That file tested the API service as a whole. I found out that nock only mocks a URL's response for one request by default. And since I was now checking for a feed URL as well, the function which returned the feed URLs from a blog URL was throwing an error since the nock for that was used up. To fix this, I had to specify in the nock statement to mock the URL response for two requests:
- What features would you consider missing/nice to haves for backend web development in Rust?
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Axios shipped a buggy version and it broke many productions apps. Let this be a lesson to pin your dependencies!
There are libraries like https://github.com/nock/nock to prevent mocking the whole axios.
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How to test an endpoint that depends on external API?
Use nock: https://github.com/nock/nock
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How to mock a useQuery in jest?
Going based off the documentation I sent you in my last reply, there is an example that uses nock to emulate api responses. I haven't used nock myself, but the example seems pretty simple to use. You just need to take the example and change the response object to be the shape of what your getStuffFromDatabase function returns. That way your useCategory function runs as close to normally as possible, while providing a mock response value instead of hitting the database.
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Is it acceptable to use mock servers, like Postman, for testing in Android?
If you’re willing to venture into nodejs territory, then nock is a fantastic and simple to set up http mock server. https://github.com/nock/nock
What are some alternatives?
msw - Seamless REST/GraphQL API mocking library for browser and Node.js.
json-server - Get a full fake REST API with zero coding in less than 30 seconds (seriously)
http-proxy - A full-featured http proxy for node.js
Express - Fast, unopinionated, minimalist web framework for node.
node-fetch - A light-weight module that brings the Fetch API to Node.js
mockoon - Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
axios - Promise based HTTP client for the browser and node.js
prism - Turn any OpenAPI2/3 and Postman Collection file into an API server with mocking, transformations and validations.
superagent - Ajax for Node.js and browsers (JS HTTP client). Maintained for @forwardemail, @ladjs, @spamscanner, @breejs, @cabinjs, and @lassjs.
http-server - a simple zero-configuration command-line http server
undici - An HTTP/1.1 client, written from scratch for Node.js