--- title: Writing tests for HTTP-triggered Azure Functions | daily.dev description: A practical guide to writing unit tests for HTTP-triggered Azure Functions using Jest and ts-jest with TypeScript. Covers setting up Jest with TypeScript,... canonical: https://daily.dev/posts/writing-tests-for-http-triggered-azure-functions-d3wh81kio twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Writing tests for HTTP-triggered Azure Functions | daily.dev og:description: A practical guide to writing unit tests for HTTP-triggered Azure Functions using Jest and ts-jest with TypeScript. Covers setting up Jest with TypeScript,... og:url: https://daily.dev/posts/writing-tests-for-http-triggered-azure-functions-d3wh81kio og:image: https://api.daily.dev/og/posts/D3WH81kio.png og:image:alt: Writing tests for HTTP-triggered Azure Functions og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Writing tests for HTTP-triggered Azure Functions **[Damir's Corner](https://daily.dev/sources/damirscorner)** · 5 min read · 0 upvotes · 0 comments ## Summary A practical guide to writing unit tests for HTTP-triggered Azure Functions using Jest and ts-jest with TypeScript. Covers setting up Jest with TypeScript, creating mock implementations of InvocationContext and HttpRequest, using data-driven tests for multiple input cases, mocking the global fetch function, and verifying both function responses and mock invocations. Also recommends complementing unit tests with local runtime testing via curl before deployment. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How do I mock the InvocationContext parameter for testing an Azure Function in TypeScript? Create a class implementing InvocationContext with all non-optional fields stubbed out, since strict TypeScript mode requires every non-optional property to be set even if unused. This includes invocationId, functionName, extraInputs, extraOutputs, log/trace/debug/info/warn/error methods that route to console, and an options object with trigger type and name. _Developers wiring up Azure Function tests can compare mocking approaches shared on daily.dev._ ### How do I test an Azure Function's fetch call and response with Jest? Mock the global fetch function with jest.fn().mockResolvedValue to control the response body and status, then assert both the fetch call arguments (toHaveBeenCalledWith) and the function's returned status, body, and headers. Clear mocks after each test with jest.clearAllMocks() in an afterEach block to keep test state isolated. _daily.dev helps developers testing serverless functions track practical Jest patterns like this._ ### How do I write data-driven tests for multiple URL redirect cases in Jest? Use Jest's test.each template literal syntax to define a table of route and expected values, then write a single test function that runs once per row, for example mapping /categories/dotnet to /tags/dotnet.html. This avoids duplicating near-identical test cases for each redirect rule. _daily.dev surfaces testing techniques like table-driven Jest tests for developers building similar suites._ ## Similar posts on daily.dev - [Testing Node.js APIs with Jest: A Frontend Developer's Guide to Backend Testing](https://daily.dev/posts/testing-node-js-apis-with-jest-a-frontend-developer-s-guide-to-backend-testing-ykfrkag4k) · SitePoint · 0 upvotes · 0 comments --- Tags: [#testing](https://daily.dev/tags/testing), [#typescript](https://daily.dev/tags/typescript), [#jest](https://daily.dev/tags/jest), [#azure-functions](https://daily.dev/tags/azure-functions) [View this post on daily.dev](https://daily.dev/posts/writing-tests-for-http-triggered-azure-functions-d3wh81kio) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Writing tests for HTTP-triggered Azure Functions","url":"https://daily.dev/posts/writing-tests-for-http-triggered-azure-functions-d3wh81kio","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/writing-tests-for-http-triggered-azure-functions-d3wh81kio"},"datePublished":"2026-06-19T08:07:18.955Z","dateModified":"2026-09-13T20:37:59.460Z","description":"A practical guide to writing unit tests for HTTP-triggered Azure Functions using Jest and ts-jest with TypeScript. 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