[{"data":1,"prerenderedAt":302},["ShallowReactive",2],{"navigation":3,"\u002Fblog\u002Fyou-do-not-have-time-to-not-have-tests":204,"\u002Fblog\u002Fyou-do-not-have-time-to-not-have-tests-surround":299},[4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96,100,104,108,112,116,120,124,128,132,136,140,144,148,152,156,160,164,168,172,176,180,184,188,192,196,200],{"title":5,"path":6,"stem":7},"You do not have time to not have tests","\u002Fblog\u002Fyou-do-not-have-time-to-not-have-tests","2.blog\u002F20211217.you-do-not-have-time-to-not-have-tests",{"title":9,"path":10,"stem":11},"Migrate Vue 2 with Vuetify and Jest to Vite and Vitest","\u002Fblog\u002Fmigrate-vue-2-with-vuetify-and-jest-to-vite-and-vitest","2.blog\u002F20220109.migrate-vue-2-with-vuetify-and-jest-to-vite-and-vitest",{"title":13,"path":14,"stem":15},"I am a Dark Matter 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Communication Protocol That Changes Everything","\u002Fblog\u002Fmarkdown-plus-ai-the-communication-protocol-that-changes-everything","2.blog\u002F20250814.markdown-plus-ai-the-communication-protocol-that-changes-everything",{"title":101,"path":102,"stem":103},"Finally: Type-Safe AI in Production (And Why I'm Here For It)","\u002Fblog\u002Ffinally-type-safe-ai-in-production-and-why-im-here-for-it","2.blog\u002F20250819.finally-type-safe-ai-in-production-and-why-im-here-for-it",{"title":105,"path":106,"stem":107},"Dotfiles: Masterpiece or Late Stage Picasso?","\u002Fblog\u002Fdotfiles-masterpiece-or-late-stage-picasso","2.blog\u002F20250822.dotfiles-masterpiece-or-late-stage-picasso",{"title":109,"path":110,"stem":111},"Beyond API Wrappers: Building State-Driven MCP Servers for Long-Horizon Agent Orchestration","\u002Fblog\u002Fbeyond-api-wrappers-mcp-servers","2.blog\u002F20250907.beyond-api-wrappers-mcp-servers",{"title":113,"path":114,"stem":115},"Why Vertical Integration Wins: A Software Engineer's Case for Owning Your Stack","\u002Fblog\u002Fwhy-i-bought-tesla-model-3-vertical-integration","2.blog\u002F20250928.why-i-bought-tesla-model-3-vertical-integration",{"title":117,"path":118,"stem":119},"The Min-Maxer's Trifecta: Building Tools for the Game You Actually Play","\u002Fblog\u002Fmin-maxer-trifecta","2.blog\u002F20251004.min-maxer-trifecta",{"title":121,"path":122,"stem":123},"Read The Source: Learning by Cutting Out The Middleman and RTFM","\u002Fblog\u002Fread-the-source","2.blog\u002F20251010.read-the-source",{"title":125,"path":126,"stem":127},"The Exponential Shift: Why AI Progress Feels Different Now","\u002Fblog\u002Fthe-exponential-shift","2.blog\u002F20251015.the-exponential-shift",{"title":129,"path":130,"stem":131},"Plan Mode for Your Problems, Edit Mode for Claude's","\u002Fblog\u002Fplan-mode-problems-edit-mode-solutions","2.blog\u002F20251019.plan-mode-problems-edit-mode-solutions",{"title":133,"path":134,"stem":135},"AWS Aurora DSQL Looked Perfect Until I Needed the Connection String","\u002Fblog\u002Faws-aurora-dsql-postgres-serverless-authentication","2.blog\u002F20251028.aws-aurora-dsql-postgres-serverless-authentication",{"title":137,"path":138,"stem":139},"Switchback: Browser History for Your Thoughts","\u002Fblog\u002Fswitchback-second-order-reasoning","2.blog\u002F20251205.switchback-second-order-reasoning",{"title":141,"path":142,"stem":143},"AI Pairing: Notes to Self","\u002Fblog\u002Fai-pairing-notes-to-self","2.blog\u002F20251216.ai-pairing-notes-to-self",{"title":145,"path":146,"stem":147},"I've Been Sleeping on Zellij","\u002Fblog\u002Fsleeping-on-zellij","2.blog\u002F20251229.sleeping-on-zellij",{"title":149,"path":150,"stem":151},"Implementing a Ralph Wiggum Loop: The Secret is Session Markers","\u002Fblog\u002Fimplementing-ralph-wiggum-loop-for-autonomous-ai-coding","2.blog\u002F20260114.implementing-ralph-wiggum-loop-for-autonomous-ai-coding",{"title":153,"path":154,"stem":155},"Goodhart's Law Ate My Context Window","\u002Fblog\u002Fgoodharts-law-ate-my-context-window","2.blog\u002F20260119.goodharts-law-ate-my-context-window",{"title":157,"path":158,"stem":159},"Claude Code's Hidden Multi-Agent System Is Real","\u002Fblog\u002Fclaude-code-hidden-multi-agent-system","2.blog\u002F20260124.claude-code-hidden-multi-agent-system",{"title":161,"path":162,"stem":163},"Free Printable Math Sheets for Kids — Number Chart, Skip Counting, Multiplication, and More","\u002Fblog\u002Ffree-printable-number-chart-and-coin-sheets","2.blog\u002F20260214.free-printable-number-chart-and-coin-sheets",{"title":165,"path":166,"stem":167},"We Are Near the End of the Exponential","\u002Fblog\u002Fnear-the-end-of-the-exponential","2.blog\u002F20260214.near-the-end-of-the-exponential",{"title":169,"path":170,"stem":171},"Free Printable Language Arts Sheets for Kids — Sight Words, Parts of Speech, Homophones, and 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Human-in-the-Loop","\u002Fblog\u002Fmulti-agent-loan-approval-human-in-the-loop","2.blog\u002F20260225.multi-agent-loan-approval-human-in-the-loop",{"title":189,"path":190,"stem":191},"The Inception of AI Infrastructure: Bottlenecks All the Way Down","\u002Fblog\u002Fbiggest-bottleneck-scaling-ai-compute","2.blog\u002F20260313.biggest-bottleneck-scaling-ai-compute",{"title":193,"path":194,"stem":195},"What I Tell Teams About Claude Code","\u002Fblog\u002Fwhat-i-tell-teams-about-claude-code","2.blog\u002F20260314.what-i-tell-teams-about-claude-code",{"title":197,"path":198,"stem":199},"The Hardest Part of AI Isn't the AI","\u002Fblog\u002Fthe-hardest-part-of-ai-isnt-the-ai","2.blog\u002F20260327.the-hardest-part-of-ai-isnt-the-ai",{"title":201,"path":202,"stem":203},"Claude Code Hooks: The Capability I Left on the Table","\u002Fblog\u002Fclaude-code-hooks-capability-left-on-the-table","2.blog\u002F20260401.claude-code-hooks-capability-left-on-the-table",{"id":205,"title":5,"authors":206,"badge":212,"body":213,"date":289,"description":219,"extension":290,"image":291,"meta":294,"navigation":295,"path":6,"seo":296,"status":297,"stem":7,"__hash__":298},"posts\u002F2.blog\u002F20211217.you-do-not-have-time-to-not-have-tests.md",[207],{"name":208,"to":209,"avatar":210},"Chris Towles","https:\u002F\u002Ftwitter.com\u002FChris_Towles",{"src":211},"\u002Fimages\u002Fctowles-profile-512x512.png",null,{"type":214,"value":215,"toc":282},"minimark",[216,220,223,228,231,234,237,240,256,259,263,266,269,272,276,279],[217,218,219],"p",{},"So first a full disclosure: I was late to get on the testing bandwagon.",[217,221,222],{},"It's shamefully obvious now, but I had heard about testing for years before I understood its value. I wish I had fully incorporated it into my development practices sooner. So maybe I can convince you to do the same.",[224,225,227],"h2",{"id":226},"life-without-tests","Life without Tests",[217,229,230],{},"You may have thought you didn't have time to write tests. You ship features fast and adding tests would slow you down. And the first week or two of a project you may be right.",[217,232,233],{},"But the good news, the project is a success. Now users want new features and more features. You need to maintain this project for a long time. Maybe years.",[217,235,236],{},"You need to add features, add different code paths and scenarios. How do you ensure that new features work and old features didn't break?",[217,238,239],{},"You manually just have to test them. Things like:",[241,242,243,247,250,253],"ul",{},[244,245,246],"li",{},"Account creation, login, logout, etc.",[244,248,249],{},"User profile, settings, etc.",[244,251,252],{},"User's posts, comments, etc.",[244,254,255],{},"checkout and payment, etc.",[217,257,258],{},"But because your project is a success, you can't be breaking things in production. So you have to be very careful. Every new feature affects the whole system. It's slow to test everything for every change, and you can't refactor or make large changes because the impact is too high to risk breaking things.",[224,260,262],{"id":261},"life-with-tests","Life with Tests",[217,264,265],{},"At the start of the project, decide to write a few tests. Not everything but happy paths. It takes a bit of time, but it's worth it. You have confidence that things are likely to work before deploying them.",[217,267,268],{},"As you add people, and you find bugs, you can add tests and the bugs stay fixed.",[217,270,271],{},"Now you decide that you have some Tech Debt that you need to address, but the change impacts the entire system. That's Ok, you can make big changes and your tests will likely ensure that you find the issues instead of your customers. Developers can submit Pull Requests if the tests pass, so chances are high it's good to merge. It might not be perfect, but it can't be so bad that happy paths fail to work.",[224,273,275],{"id":274},"long-term","Long Term",[217,277,278],{},"Now guess which product will be faster to deliver and make changes on. Which one is it easier to onboard new developers?",[217,280,281],{},"Add the tests and thank me later.",{"title":283,"searchDepth":284,"depth":284,"links":285},"",2,[286,287,288],{"id":226,"depth":284,"text":227},{"id":261,"depth":284,"text":262},{"id":274,"depth":284,"text":275},"2021-12-17","md",{"src":292,"alt":293},"\u002Fimages\u002Fblog\u002Fblog-passing-tests.png","picture of tests passing in vitest",{},true,{"title":5,"description":219},"published","nKyfLmYQ2NXkf2g-Fpyvzu8I_mUFeqkC2lGygnhWYik",[212,300],{"title":9,"path":10,"stem":11,"description":301,"status":297,"children":-1},"So my main project at work is a Vue 2 and Vuetify 2 site, but privately I have been playing with Vue 3 and loved the Composition API to avoid mixins. Due to some new features, we are planning to build soon. I wanted to write it in Vue 3, to prevent needing to migrate it later.",1776221196452]