Better world by better software

Gleb Bahmutov PhD

Our planet 🌏 is in danger

Act today: what you can do

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
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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
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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
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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
Oct 22 2019
products

Run End-to-end Tests from Markdown Files

A way to test Cypress examples in Markdown files to guarantee their correctness.

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  • cypress
  • documentation
  • markdown
Oct 21 2019
climate

Cambridge MA elections

Cambridge, MA council candidates who put climate as the number one priority issue.

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  • climate
Sep 14 2019
process

Testing Angular application via App Actions

How to bypass user interface to directly dispatch actions to Angular 8 application from Cypress end-to-end tests.

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  • cypress
  • testing
Sep 11 2019
process

Visual diffing flow for your pretty CLI applications

How to use Percy.io visual diffing service to prevent regressions in terminal programs.

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  • testing
  • visual testing
Sep 9 2019
products

How to configure Prettier and VSCode

How to set up Prettier, ESLint and VSCode per project and have your JavaScript auto-formatted without pulling your hair.

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  • javascript
  • markdown
  • tutorial
Sep 3 2019
products

Cypress using child window

How to test your site in a child window rather than iframe when using Cypress.

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  • cypress
Sep 2 2019
process

Patching Cypress CLI NPM module

How to patch fix installed NPM module to avoid waiting for an official bug fix.

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  • cypress
  • nodejs
Sep 1 2019
products

Fix low contrast with Cypress

How to run accessability contrast test against a page to prevent low-contrast problem.

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  • a11y
  • cypress
  • testing
Aug 31 2019
products

Filtering Mocha tests

How to filter the collected Mocha unit tests before running them.

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  • testing
Aug 29 2019
products

Detect page reload from Cypress test

How to detect from Cypress test when a page reloads using object property assertions.

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  • cypress
Aug 17 2019
climate

Climate Emergency

The planet is burning. What we must do immediately.

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  • climate
Aug 12 2019
products

Ariel Rider M-class

Electrical bicycle is a superb mobility device.

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Aug 1 2019
process

How to write end-to-end test using app and api actions

How to bypass user interface when writing end-to-end tests.

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  • cypress
  • testing
Jul 19 2019
process

Black box API testing with server logs

How to perform end-to-end API testing using Cypress test runner and take advantage of server logs.

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  • cypress
  • nodejs
  • testing
Jul 5 2019
process

Capture all the logs

How to capture console.log, console.error and even DEBUG=... logs.

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  • nodejs
  • testing
Jun 20 2019
products

Run Cypress included from Docker container

How to test web application running on localhost using Cypress running inside a Docker container

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  • cypress
  • docker
May 21 2019
products

End-to-end Testing for Server-Side Rendered Pages

How to validate SSR page using Cypress.io test runner

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  • cypress
  • reactjs
  • testing
May 19 2019
products

Combined End-to-end and Unit Test Coverage

How to achieve 100% code coverage by combining end-to-end and unit tests without losing your sanity.

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  • code coverage
  • cypress
  • testing
May 16 2019
products

Code Coverage by Parcel Bundler

How to instrument code on the fly using Parcel bundler and collect code coverage during end-to-end tests.

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  • code coverage
  • cypress
  • testing
May 9 2019
products

Using TypeScript aliases in Cypress tests

How to configure TypeScript and Webpack path aliases to load application code from Cypress tests

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  • cypress
  • testing
  • typescript
May 6 2019
products

Code Coverage for End-to-end Tests

How to instrument application code and collect code coverage during Cypress E2E tests.

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  • code coverage
  • cypress
  • testing
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  • Use Required Test Tags Instead Of Skipping Tests
  • Cypress London August 2023 Workshop
  • Test With A Different Item Every Day
  • Cypress And Twilio
  • Do Not Use SHA To Compare HTML During E2E Tests
© 2023 Gleb Bahmutov
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