--- title: Testing can be fun, actually | daily.dev description: Snapshot testing is a technique that automates test assertions by capturing and storing expected outputs, then comparing future runs against saved snapshots.... canonical: https://daily.dev/posts/testing-can-be-fun-actually-iorwrxdme twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Testing can be fun, actually | daily.dev og:description: Snapshot testing is a technique that automates test assertions by capturing and storing expected outputs, then comparing future runs against saved snapshots.... og:url: https://daily.dev/posts/testing-can-be-fun-actually-iorwrxdme og:image: https://api.daily.dev/og/posts/IORWrXDMe.png og:image:alt: Testing can be fun, actually 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. # Testing can be fun, actually **[Lobsters](https://daily.dev/sources/lobsters)** · 16 min read · 0 upvotes · 0 comments ## Summary Snapshot testing is a technique that automates test assertions by capturing and storing expected outputs, then comparing future runs against saved snapshots. Instead of manually writing and maintaining verbose test assertions, developers write tests that produce output, review it once, and let the testing library handle comparisons. The approach works across domains from CLI help text to compiler tooltips to animation functions. Key practices include using descriptive titles, keeping snapshots small and focused, formatting output for easy visual review, and knowing when traditional assertions are more appropriate. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Snapshot Tests for Software with Complex Data](https://daily.dev/posts/snapshot-tests-for-software-with-complex-data-h90rva6qg) · Atomic Spin · 2 upvotes · 0 comments - [Master Complex Data Migrations with Snapshot Testing](https://daily.dev/posts/master-complex-data-migrations-with-snapshot-testing-6bil54f0b) · Atomic Spin · 0 upvotes · 0 comments - [3 Tips for Effective Snapshot Testing with Roborazzi](https://daily.dev/posts/3-tips-for-effective-snapshot-testing-with-roborazzi-1lkco7jab) · Atomic Spin · 0 upvotes · 0 comments --- Tags: [#testing](https://daily.dev/tags/testing), [#rust](https://daily.dev/tags/rust), [#cli](https://daily.dev/tags/cli), [#gleam](https://daily.dev/tags/gleam) [View this post on daily.dev](https://daily.dev/posts/testing-can-be-fun-actually-iorwrxdme) ```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":"Testing can be fun, actually","url":"https://daily.dev/posts/testing-can-be-fun-actually-iorwrxdme","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/testing-can-be-fun-actually-iorwrxdme"},"datePublished":"2026-02-09T06:35:42.576Z","dateModified":"2026-02-09T06:36:06.013Z","description":"Snapshot testing is a technique that automates test assertions by capturing and storing expected outputs, then comparing future runs against saved snapshots....","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e37c042ec67f8a9c1268be86b4181cba?_a=AQAEunF","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e37c042ec67f8a9c1268be86b4181cba?_a=AQAEunF","isAccessibleForFree":true,"articleSection":"Lobsters","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Lobsters","logo":"https://media.daily.dev/image/upload/s--tl8v_Fku--/f_auto,t_logo/v1698841318/logos/lobste.jpg","url":"https://daily.dev/sources/lobsters"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/testing-can-be-fun-actually-iorwrxdme","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"testing,rust,cli,gleam","timeRequired":"PT16M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Lobsters","item":"https://daily.dev/sources/lobsters"},{"@type":"ListItem","position":3,"name":"Testing can be fun, actually"}]} ```