sinon

JavaScript test spies, stubs and mocks.

v21.0.0 URL: https://unpkg.com/sinon@21.0.0/lib/sinon.js

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sinon test testing unit stub spy fake time clock mock xhr assert

@webext-core/fake-browser

An in-memory implementation of webextension-polyfill for testing. Supports all test frameworks (Vitest, Jest, etc)

v1.3.2 URL: https://unpkg.com/@webext-core/fake-browser@1.3.2/lib/index.cjs

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web-extension browser-extension chrome-extension webext web-ext chrome firefox safari browser extension testing vite jest mock fake webextension-polyfill

xhr-mock

Utility for mocking XMLHttpRequest.

v2.5.1 URL: https://unpkg.com/xhr-mock@2.5.1/lib/index.js

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mock xhr test fake request ajax browser xmlhttprequest jquery superagent axios

nise

Fake XHR and server

v6.1.1 URL: https://unpkg.com/nise@6.1.1/lib/index.js

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test testing fake mock xhr server

mockttp

Mock HTTP server for testing HTTP clients and stubbing webservices

v4.2.1 URL: https://unpkg.com/mockttp@4.2.1/dist/main.browser.js

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testing test mock mockttp stub fake http server