Artem Zakharchenko

@kettanaito.com

4501 Followers 217 Following

Software engineer. Helping you master automated testing at http://EpicWeb.dev. Author mswjs.io. Instructor egghead.io. I tell stories @zakarcher.com. My debut book "LOGGERHEADS" it out 👇 https://zakarcher.com/books/loggerheads

Code snippet in TypeScript for handling SMTP events, including session, authentication, and message processing.

Code snippet implementing a mock database connection, handling SELECT and INSERT operations for a "users" table with error simulation.

Data metrics showing a positive increase of +22,045 and a decrease of -14,662, accompanied by colored indicators.

Notification of new sponsorship from Spotify to mswjs for a one-time amount of $17,631.00.

A figure in a long, dark dress with hair covering the face stands in a dimly lit room, surrounded by photographs, with an upgrade reminder below.

Code snippet demonstrating a custom matcher in JavaScript for validating optional object properties without failing when absent.

A fierce character with spiky hair brandishes a sword amidst a dramatic background, expressing determination and energy.

A notification announces a new sale with a value of $0.00, highlighting a moment in software-building.

A bold statement captures shock about a man's rapid loss of control, suggesting humor or intense surprise in writing.

The interface displays "Alice in Wonderland" cover art, with chapters listed and book details on the side, indicating a digital eBook setup.

Typeface settings display for EB Garamond, showing styles like Regular, Italic, and ExtraBold. Total size listed is 1.6MB.

A WYSIWYG editor displays the text of "Chapter I" from Alice's Adventures in Wonderland, showing formatting options and highlighted text.

A screenshot of an EPUB editor. Alice's Adventures in Wonderland is opened at the first chapter, showcasing the WYSIWYG capabilities of the editor. The "Chapter title" style is being edited on the right.

A checklist detailing app publishing commands for macOS, Windows, and Ubuntu systems, indicating successful build confirmations.

Wrangler config featuring a dev.rootDir option I'd like.

Code snippet shows a line where a new stylesheet is created, featuring various colored text elements against a dark background.

A code snippet testing the presence of buttons labeled "Typeface," "Text flow," and "Text alignment" within a typography group.

A KDP dashboard screenshot showing 2 orders of my book.

My Bluesky circle.

Code snippets demonstrate visual regression testing with methods for full page and element-specific screenshot assertions.

JavaScript code snippet showing asynchronous functions for API requests and response validation using expect statements.

Code snippet demonstrating the use of `expect().toPass()` in Playwright for coupling actions with related expectations.

Code snippet showing a command to repeat test cases labeled "unauthorized" ten times using Playwright.

Command line input displays a Playwright test command with specific parameters for running a test suite multiple times.

A cosmic-themed graphic promoting "React E2E Testing with Playwright" featuring a sleek design and bold text elements.

The graph shows a significant increase in weekly downloads of MSW, rising from 6.7M to 15.5M over five months.

Code snippet for managing server-sent events using `setInterval` and `setTimeout`, including cleanup function for resource management.

Menu for "E2E React Testing with Playwright" featuring sections on Fundamentals, Authentication, Guides, and Debugging.

Code snippet shows an import statement for a WebSocket library and a callback function handling HTTP to WebSocket upgrades in Node.js.