Better world by better software

Gleb Bahmutov PhD

Our planet 🌏 is in danger

Act today: what you can do

Jun 9 2021
products

Test a Socket.io Chat App using Cypress

How to write simple test for a real-time chat web application.

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  • cypress
Jun 2 2021
products

Cypress Automation

Using Chrome Debugger Protocol from Cypress

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  • cypress
May 28 2021
process

Common Documentation Mistakes and How to Avoid Them

We made the Cypress documentation exceptional by avoiding these mistakes.

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  • advice
  • documentation
May 18 2021
products

Burning Tests with cypress-grep

How to run the same test again and again to confirm it is flake-free

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  • cypress
  • testing
May 13 2021
process

Make Example Code Copy Pastable

Try to make your code snippets the real things someone can paste into the file and use right away.

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  • advice
  • documentation
May 4 2021
products

Git Tips And Tricks

Various Git tips I learnt along the way

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  • git
May 1 2021
climate

In Support of the Cambridge Green New Deal Zoning Petition

Why I support the Green New Deal Zoning petition.

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  • climate
Apr 30 2021
products

NPM Tips and Tricks

Little NPM secrets I learnt along the way

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  • cypress
  • nodejs
Apr 24 2021
process

How I Answer a Cypress Question

How I answer a typical user question with a tested Cypress example

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  • cypress
Apr 23 2021
products

Scraping the List of Presentation Slides

How to use Cypress to scrape the list of public presentations at slides.com

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  • cypress
  • presentation
Apr 21 2021
products

Cypress request and cookies

How to use cy.request, window.fetch, and cy.task commands to make HTTP requests to the server with and without cookies

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  • cypress
Apr 20 2021
products

Testing Mongo with Cypress

How to access the MongoDB during Cypress API tests locally and on CircleCI

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  • circle
  • cypress
  • db
Apr 19 2021
process

Writing Tests Progress

How to track the written tests using the Cypress test statuses

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  • cypress
Apr 17 2021
process

Cypress Test Statuses

How to track the written tests using the Cypress test statuses

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  • cypress
Apr 16 2021
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Load Fixtures from Cypress Custom Commands

How to load or import fixtures to be used in the Cypress custom commands

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  • cypress
Apr 6 2021
products

Stub window.track

How to stub the event analytics method window.track.

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  • cypress
Mar 30 2021
products

Fast Cypress spec bundling using ESBuild

Measuring how fast esbuild bundles Cypress specs

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  • cypress
  • performance
Mar 27 2021
products

Stub window.open

How to stub the window.open method for every window

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  • cypress
Mar 20 2021
products

Same Data = Same Page

How to ensure the hydrated Next.js page does not suddenly change

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  • react
Mar 16 2021
climate

Green Investing

How I invest money to follow my principles of saving the planet for our and the next generations.

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  • climate
Mar 11 2021
products

How I Organize my NPM Scripts

The typical script names in package.json and how I run them

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  • cypress
  • nodejs
Mar 10 2021
products

Write Cypress Markdown Preprocessor

How to write a file preprocessor for bundling Cypress specs

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  • cypress
  • tutorial
Mar 8 2021
climate

My testimony in support of Building Justice with Jobs Act

My testimony in support of retrofitting the existing buildings with all electric infrastructure instead of fossil fuels.

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  • climate
Mar 4 2021
products

Canvas Visual Testing with Retries

How to visually compare a rendered Canvas with retry-ability

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  • cypress
  • visual testing
Mar 3 2021
products

Writing Cypress Recurse Function

A collection of videos about writing cypress-recurse NPM module

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  • cypress
  • tutorial
Feb 22 2021
products

How to Test Anchor Ping

How to confirm the browser sends POST request when you use anchor ping attribute.

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  • cypress
Feb 19 2021
products

Deploy E-Commerce Site to Netlify and Test Using GitHub Actions

How to test a site deployed to Netlify by starting a GitHub Actions workflow.

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  • ci
  • cypress
  • cypress dashboard
  • github
  • netlify
Feb 17 2021
products

Presentations with Reveal.js and Vite

How to set up local HTML presentations using Reveal.js engine bundled by Vite.js

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  • presentation
Feb 13 2021
products

window.onbeforeunload and Cypress

Prevent Test Runner hanging when the application uses confirmation dialog in window.onbeforeunload callback

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  • cypress
Feb 12 2021
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Testing Time Zones in Parallel

Running the same Cypress tests with different browser time zones in parallel

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  • ci
  • cypress
  • cypress dashboard
  • github
Feb 10 2021
products

How to Test Monorepo Apps Using Cypress GitHub Action

How to run different GitHub workflows depending on the changed files

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  • ci
  • cypress
  • cypress dashboard
  • github
  • testing
Feb 8 2021
products

Test Sites Deployed To Netlify Using netlify-plugin-cypress

Test a site after deploying it to Netlify preview or production environment.

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  • 11ty
  • ci
  • cypress
  • cypress dashboard
  • netlify
Feb 5 2021
products

HTML Form Validation in Cypress

How to check if the form is valid before submitting it.

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  • cypress
Feb 1 2021
products

How to Avoid Using Global Cypress Variables

Avoid clashing global types between Cypress and Jest by using local-cypress library.

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  • cypress
Jan 29 2021
process

Solve The User Problem

Resolving a user issue through the most appropriate series of actions

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  • advice
  • cypress
Jan 26 2021
products

Split Long GitHub Action Workflow Into Parallel Cypress Jobs

An example of splitting a GitHub Actions testing workflow into several jobs.

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  • ci
  • cypress
  • cypress dashboard
  • github
  • performance
Jan 25 2021
products

Debugging Cypress Geolocation Problem

An investigation into a hanging application that required geolocation access during Cypress test.

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  • cypress
Jan 22 2021
products

How to Publish Custom Cypress Command on NPM

How to test, transpile, and publish an NPM module with a custom Cypress command.

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  • cypress
Jan 21 2021
products

Start CircleCI Machines Faster by Using RAM Disk

How to make sure the CI machines are not IO-limited when running Cypress tests in parallel on CircleCI machines

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  • circle
  • cypress
  • cypress dashboard
  • performance
Jan 14 2021
products

Be Careful With Negative Assertions

Because negative assertions can pass for the wrong reason.

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  • cypress
  • testing
Jan 6 2021
products

Backend Code Coverage from Cypress API tests

How to cover the entire backend code using Cypress API tests.

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  • code coverage
  • cypress
  • testing
Dec 27 2020
products

Writing a Custom Cypress Command

A tutorial explaining how to write a custom Cypress command with retry-ability.

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  • cypress
  • typescript
Dec 16 2020
products

Make Cypress Run Faster by Splitting Specs

Split the long-running spec into smaller specs in a subfolder.

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  • ci
  • circle
  • cypress
  • cypress dashboard
  • performance
  • testing
Dec 9 2020
products

Cypress cy.intercept Problems

A few common cy.intercept gotchas and how to avoid them

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  • cypress
  • testing
Dec 7 2020
products

Cypress Timings

How to see the individual command timings.

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  • cypress
  • performance
Dec 5 2020
climate

Massachusetts Climate The Final Push

The planet is burning. What we must do immediately.

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  • climate
Dec 3 2020
process

Debug the Element Visibility Problems in Cypress

How to step through the visibility code to determine why Cypress thinks an element is invisible during the test

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  • cypress
Nov 29 2020
products

Update Dependencies Using The Wisdom of The Crowds

Renovate dependency upgrades become even better by showing the upgrade stats collected across all projects.

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  • modular development
  • renovate
Nov 25 2020
products

Repeat Test to Fight Flake

Repeat the same test and the entire project to find flakey tests

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  • advice
  • cypress
Nov 13 2020
products

Do Not Let Cypress Cache Snowball on CI

Do not use lax restore cache keys or your Cypress cache will blow up in size

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  • advice
  • ci
  • cypress
Nov 12 2020
products

Cypress Metaprogramming

When the failing test is the passing test

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  • cypress
  • testing
Nov 11 2020
process

Net Zero Stretch Code Testimony

Testimony in favor of adopting strict Net Zero building stretch code in Massachusetts

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  • climate
Nov 11 2020
products

Universal Code Test with Cypress

How to confirm that universal JavaScript code outputs the same result in the browser as it does in Node.

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  • cypress
Nov 10 2020
products

Versioned Docs Pages

How to deploy versioned documentation site to GitHub Pages using GitHub Actions

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  • github
Nov 1 2020
people

Help Me Say Yes

How to apply to a job in a way to make the hiring manager say "Yes" to your application.

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  • advice
  • hiring
Oct 31 2020
products

Do Not Let NPM Cache Snowball on CI

Do not use lax restore cache keys or your cache will roll over with unused dependencies

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  • advice
  • ci
  • nodejs
Oct 28 2020
products

Writing Webpack Loader

Example guide to writing a simple Webpack loader

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  • javascript
  • markdown
  • tutorial
  • webpack
Oct 19 2020
process

Effective React Tests

How to write effective React tests using Cypress

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  • cypress
  • react
  • testing
Oct 13 2020
products

Testing Content-Security-Policy using Cypress ... Almost

How to almost test Content-Security-Policy violations in your site using Cypress

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  • cypress
  • security
Oct 10 2020
products

Cypress WASM Example

How to load and test WASM code using Webpack and test it using Cypress

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  • cypress
Oct 9 2020
process

Testing Pyramids

How to release a well-tested library that never breaks the users' projects

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  • advice
  • testing
Oct 8 2020
products

Access XState from Cypress Test

How to access the XState state machine from Cypress test to verify the current context, observe events, and drive the app via actions

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  • cypress
  • model-based testing
  • testing
Oct 7 2020
products

Difference between cy.route and cy.route2

The new command cy.route2 is everything one needs to spy and stub network requests from the application under test

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  • cypress
  • testing
Oct 6 2020
process

Rocks and Stones

How to develop software without wasting time planning or ignoring important parts of the project

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Oct 4 2020
products

Smart GraphQL Stubbing in Cypress

How to spy on and stub GraphQL calls from the application using Cypress and its new cy.route2 API

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  • cypress
  • graphql
Sep 30 2020
process

Multiple Benefits

How to derive multiple benefits from writing software.

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Sep 29 2020
products

Wrap Cypress Using NPM Module API

How to wrap Cypress commands using its NPM module API to customize the test runner behavior.

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  • cypress
Sep 26 2020
products

Components People Test

How to test individual React components the same way as end-to-end web applications.

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  • cypress
  • react
  • testing
Sep 18 2020
products

Cypress Book

Generate web application tutorials using real Cypress tests.

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  • cypress
  • markdown
Sep 1 2020
process

What I Have Done - An Analysis

Looking at my personal daily task logs from the past 18 months

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  • advice
  • markdown
Aug 25 2020
people

It Is OK to Get Stuck Sometimes

How we wasted three days due to missing "await"

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  • javascript
Aug 20 2020
process

Test the Preview Vercel Deploys

Run end-to-end Cypress tests against Vercel preview deploys using GitHub Actions

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  • 11ty
  • ci
  • cypress
  • cypress dashboard
  • github
  • vercel
Aug 5 2020
process

Test The Interface Not The Implementation

Moving from Jest + RTL to Cypress + @testing-library/cypress for testing React components

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  • cypress
Jul 22 2020
products

Why Cypress?

Answers to three common questions from people skeptical about Cypress.

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  • cypress
  • testing
Jul 11 2020
climate

How to Testify About Environment at a Public Hearing

My notes on testifying in person or in writing during a hearing.

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  • climate
Jul 2 2020
products

Write Your First Vue Component Test

Introducing cypress-vue-unit-test for better Vue component testing experience inside Cypress test runner.

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  • cypress
  • testing
  • vuejs
Jun 17 2020
process

Stop The Money Pipeline

Do not pay people to destroy the planet.

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  • climate
Jun 16 2020
process

Visual testing for React components using open source tools

Comparing React components pixel by pixel to catch style problems

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  • cypress
  • react
  • testing
  • tutorial
  • visual testing
Jun 15 2020
process

Import Cypress fixtures

How to refactor loading JSON fixtures for simplicity

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  • cypress
  • testing
Jun 3 2020
process

Tic-Tac-Toe Component Tests

Moving from end-to-end to component and unit tests

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  • cypress
  • react
  • testing
May 28 2020
products

Be careful when running all specs together

A common mistake when using beforeEach hooks in Cypress specs

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  • cypress
May 22 2020
process

Keep Examples Up To Date

Use tests and automatic dependency updates to keep examples up to date with the latest versions of the relevant library. Make it visible with dependency version badges.

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  • documentation
  • markdown
  • renovate
May 20 2020
products

Mocking named TypeScript imports during tests

How to stub named imports during unit tests

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  • testing
  • typescript
Apr 29 2020
process

My Vision for Component Tests in Cypress

How I see end-to-end and component and unit tests working together

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  • cypress
Apr 10 2020
products

Cleaning Up Space on Development Machine

How to prune unused Docker images, delete large node_modules, and clean old Cypress binaries

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  • cypress
  • docker
  • nodejs
Mar 31 2020
products

How To Update Only Some Dependencies Using Renovate App

Configure Renovate too only check updates for some dependencies and not all of them.

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  • renovate
Mar 30 2020
products

Example CI configs

Code samples of my common continuous integration configuration files for GitHub Actions, CircleCI

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  • ci
Mar 28 2020
products

Testing Sentry Call with Cypress

How to verify Sentry call happens on an unhandled exception

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  • cypress
  • sentry
  • testing
Mar 26 2020
process

Scrape Static Site with Algolia

How to scrape static site from GitHub Action using Algolia.

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  • algolia
  • github
Mar 24 2020
process

Triple Tested Static Site Deployed to GitHub Pages Using GitHub Actions

How to test static sites three times before and after deployment to GitHub pages.

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  • ci
  • cypress
  • cypress dashboard
  • github
  • tutorial
Mar 5 2020
process

CitizenClimateLobby short pitch

90-second pitch for CitizenClimateLobby I gave at PKG meeting at MIT.

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  • climate
Mar 3 2020
products

Support Node 6 installs

How to bundle and transpile your NPM module to run on older Node versions.

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  • javascript
  • nodejs
Feb 12 2020
products

Check links in your Markdown documents

How to never have a wrong link in your README and other Markdown files.

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  • markdown
Jan 27 2020
climate

My testimony in support of banning gas infrastructure in new construction in Cambridge, MA

We have plenty of natural offshore wind and solar resources to satisfy all our electricity needs many times over. To say that we can’t switch to all green, all renewable, all safe electricity 50 years after we went to the Moon is a lie, and not a very convincing lie. Ban gas infrastructure now.

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  • climate
Dec 29 2019
climate

A plea for climate in year 2020

An email I have sent to my friends at the end of 2019.

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  • climate
Dec 28 2019
products

Paint roof white

I have painted the roof of my house white to keep cool in the summer

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  • climate
Dec 1 2019
products

Keep passwords secret in E2E tests

How to pass passwords and tokens during Cypress tests to avoid accidentally revealing them in screenshots, videos and logs

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  • cypress
  • security
  • testing
Nov 29 2019
products

How to set up Mocha with Sinon.js

Step by step guide to using Sinon.js mocking library with Mocha.js test runner

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  • javascript
  • testing
  • tutorial
Nov 19 2019
products

Cypress Talks

Collection of my talks about Cypress.io from recent conferences with videos and direct links to slides.

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  • cypress
Nov 15 2019
products

Trying GitHub Actions

Run Prettier inside a GitHub Action to fix code formatting, quick NPM install with caching inside actions, running end-to-end Cypress tests using custom action.

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  • github
  • tutorial
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Recents

  • How We Run The Mobile Web Browser Tests at Mercari US
  • Pass The Reference
  • Check More Things Before Clicking
  • Set All Cypress Env Values Using A Single GitHub Actions Secret
  • A Quick React Component Test
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