EngBlogs - Gleb Bahmutov

31. Use Copilot Instructions And Page Objects (glebbahmutov.com)

Ask Copilot agent to write the full end-to-end test and it is likely to write nonsense. For example, let's test the "zero teams / zero players" message on my soccer web app.I can start a new test in the existing "Teams" spec filecypress/e2e/teams.cy.js123describe('Teams', () => { it.only('shows zero...

Gleb Bahmutov Sep 3, 2025 read 🤖 Summary

32. Useful Newsletters (glebbahmutov.com)

Here are a couple of newsletters I subscribe to keep up-to-date on Node.js, JavaScript, front-end development, and testing.Smashing Magazine newsletter has high-quality front-end, CSS, and design articlesWebTools weekly is a weekly round-up of apps, scripts, plugins, and other resources to help fron...

Gleb Bahmutov Aug 20, 2025 read 🤖 Summary

33. Does This Look Right To You, AI? (glebbahmutov.com)

How does a human quality assurance engineer (QA) test a web application? If I ask you to look at this TodoMVC web app, how do you know what features it has?From your life experience, you might guess that this app lets the user enter new Todo items and should show them in the list somewhere below the...

Gleb Bahmutov Jul 16, 2025 read 🤖 Summary

34. Copilot Pull Request Reviews For Testability (glebbahmutov.com)

If you are using GitHub Copilot to review pull requests, you can give it specific instructions via .github/copilot-instructions.md. I confirmed that using either an explicit list with every item starting with When performing a code review, ... or a combined section works.This works:123456789When per...

Gleb Bahmutov Jun 27, 2025 read 🤖 Summary

35. Build RAG Using Chroma DB (glebbahmutov.com)

Imagine you ask AI/LLM how to do a particular task by describing what you want to accomplish in code comments.test-examples/spec2.cy.js12345678// this is a Cypress end-to-end testit('changes the label after the click', () => { cy.visit('/') // TODO: there is label element with id "foo" // and a butt...

Gleb Bahmutov Jun 24, 2025 read 🤖 Summary

36. Test Tag Suggestions Using AI (glebbahmutov.com)

In my previous blog post Pick E2E Tests To Run Using AI Summaries I picked specs to run using an intermediate text summaries. In this blog post I will show a simpler and cheap way of suggesting the end-to-end test tag for each pull request.🎁 You can find the example application source code in the re...

Gleb Bahmutov Jun 4, 2025 read 🤖 Summary

37. Pick E2E Tests To Run Using AI Summaries (glebbahmutov.com)

Imagine you have a web application. If you are reading this blog, you probably have an extensive set of end-to-end Cypress tests for this web application. Someones modifies the source code for the web app (could be changes to HTML, JavaScript, or CSS styles), and asks you "which tests should I run t...

Gleb Bahmutov May 22, 2025 read 🤖 Summary

38. Mock The Location Href Property (glebbahmutov.com)

Let's say the application changes the URL using the assignment:1location.href = 'https://acme.com'Can we prevent the URL change? For example, we might want to limit our test to the current origin. Let's do it using the following example page:index.html1234<body> <h1>Hello World</h1> <script src="app...

Gleb Bahmutov May 19, 2025 read 🤖 Summary

39. How I Stay Productive (glebbahmutov.com)

There is a lot going on. To stay on top of everything I need to do and ongoing tasks, I use simple plain Markdown text files for my daily logs. The files are stored locally on my machine, but they are part of a private GitHub repo for backup. I use Typora as my Markdown text editor; it is lightweigh...

Gleb Bahmutov May 9, 2025 read 🤖 Summary