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Top 23 TypeScript Mock Projects
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One of the core functionalities I wanted to test involved integrating with the Gemini API. Since I didn’t want to rely on the live API for testing, I decided to mock the API calls. Initially, I tried using Nock, but I ran into issues because it didn’t work well with Node’s default fetch implementation. It seemed that the Gemini library was using the default fetch instead of a third-party fetch implementation, which caused the mock to fail. After several attempts without success, I switched to another library called MSW (Mock Service Worker). Although it required a bit more setup to create a mock server, it worked flawlessly on the first try. I crafted an example response based on how the Gemini API would respond, which allowed me to test the refactored functionality.
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mockoon
Mockoon is the easiest and quickest way to run mock APIs locally. No remote deployment, no account required, open source.
I hate mocks. I tend to work in languages which allow side-effects, and with developers who do not follow Pure Core, Imperative Shell. So anything I can do to learn more about my enemy, and how to manage it, is a good use of time, and Mockoon is another one of those mock creators.
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graphql-tools
:wrench: Utility library for GraphQL to build, stitch and mock GraphQL schemas in the SDL-first approach
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orval
orval is able to generate client with appropriate type-signatures (TypeScript) from any valid OpenAPI v3 or Swagger v2 specification, either in yaml or json formats. 🍺
Project mention: 🚀 Autogeneration of data fetching functions and typing with Orval | dev.to | 2024-10-04Orval is a tool for generating client code for RESTful APIs based on OpenAPI specifications. Its official documentation can be found here.
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mongodb-memory-server
Manage & spin up mongodb server binaries with zero(or slight) configuration for tests.
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Project mention: Smocker: Smocker is a simple and efficient HTTP mock server and proxy | news.ycombinator.com | 2024-02-21
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ng-mocks
Angular testing library for mocking components, directives, pipes, services and facilitating TestBed setup
providing the mocks might require a lot of cumbersome code in some cases. It makes sense to use extra tools to simplify it. For instance, ng-mocks for Angular
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jest-mock-extended
Type safe mocking extensions for Jest https://www.npmjs.com/package/jest-mock-extended
How large is your project?
Without process isolation we got 6x speedup vs. jest! But it is difficult to ensure a clean slate between our test suites (~40 suites)
We are also using some helpers to mock, e.g https://github.com/marchaos/jest-mock-extended - its such helper libraries im concerned about.
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aws-sdk-client-mock
AWS JavaScript SDK v3 mocks for easy unit testing. 🖋️ Typed 🔬 Tested 📄 Documented 🛠️ Maintained
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Yeah, the last line is 🤮 and one can improve it with utilities like shoehorn hiding all complexity underneath.
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Project mention: Major updates from the open source community: Release Radar · June 2024 | dev.to | 2024-07-05
Want a browser library that intercepts AJAX calls to mock a REST server based on JSON data? Then look no further than FakeRest. The new update has a tonne of new features including added support for Mock Service Worker (MSW), string identifiers, custom ID generation, and many more abilities. Check out the release notes for all the changes.
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suites
A testing meta-framework that simplifies unit testing by reducing boilerplate code and enabling developers to build comprehensive and reliable test suites
Project mention: Unit Test Like a Pro: Automock, My Open Source Answer to Mocking Frustration 🤓💡🎭 | dev.to | 2023-12-12🔗 Here are some links to check out: 😎 GitHub: https://github.com/automock/automock 🐈 Automock's NestJS Official Recipe: https://docs.nestjs.com/recipes/automock 📦 NPM: https://www.npmjs.com/package/@automock/jest 📚 Docs Website: https://automock.dev
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shallow-render
Angular testing made easy with shallow rendering and easy mocking. https://getsaf.github.io/shallow-render
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
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Index
What are some of the best open-source Mock projects in TypeScript? This list will help you:
| Project | Stars | |
|---|---|---|
| 1 | msw | 16,023 |
| 2 | mockoon | 6,598 |
| 3 | graphql-tools | 5,356 |
| 4 | falso | 3,220 |
| 5 | orval | 3,244 |
| 6 | graphql-faker | 2,694 |
| 7 | mongodb-memory-server | 2,608 |
| 8 | Mocky | 2,064 |
| 9 | smocker | 1,162 |
| 10 | ng-mocks | 1,063 |
| 11 | jest-mock-extended | 854 |
| 12 | aws-sdk-client-mock | 813 |
| 13 | mockttp | 787 |
| 14 | openapi-backend | 625 |
| 15 | shoehorn | 459 |
| 16 | FakeRest | 439 |
| 17 | msw-storybook-addon | 410 |
| 18 | observer-spy | 377 |
| 19 | suites | 374 |
| 20 | shallow-render | 273 |
| 21 | jest-dynalite | 148 |
| 22 | laika | 124 |
| 23 | strong-mock | 101 |
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