Posts about Testing

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Test262, Inside-out

Have you ever noticed how easy it can be to overlook small problems in everyday life? Some things start off as imperceptible but slowly intensify over time, and just like the apocryphal frog in boiling water, we acclimate. In pathological cases, we don’t recognize what’s happening until the issue has grown way out of hand. […]

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Introducing the Web Platform Contribution Guide

Many people in the web development community, including many of us at Bocoup, were drawn to the web because it appears to be a diverse and inclusive technology platform. But, when we look around the room at who is working on web standards like HTML, CSS and JavaScript, it is mostly a narrow group of […]

Launching Test262 Results on MDN Web Docs

We are excited to announce support for report embedding on test262.report, along with a new MDN collaboration to bring up-to-date information about ECMAScript feature conformance to MDN Web Docs. Starting today, you can view test results from Test262 Report, updated daily and embedded directly on MDN pages for the newest ECMAScript features where interoperability and […]

Charting Web Platform Interoperability in 2018

Bocoup has been a long-time contributor to the Web Platform Tests (WPT) project, helping spec writers draft testable specs and helping browser implementers test features for correctness and interoperability based on those specs. In 2018, we’ve made great strides improving the coverage of WPT, the ergonomics of writing and running tests, and the infrastructure necessary […]

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The Eight-Month Omelette: adding a feature to one million conformance tests

The web-platform-tests project (WPT) houses over a million tests written to ensure our browsers provide a consistent experience of the web. WPT predates most of today’s popular JavaScript testing frameworks, so it implements one of its own: testharness.js. In December of 2017, I offered to extend testharness.js with a new feature. No one expected this […]

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Announcing Test262 Report

Today we’re launching Test262 Report to provide JavaScript developers with up-to-date information on the state of new and existing language features across implementations. Test262 Report is based on daily runs of Test262, the ECMA-262 (“ECMAScript” or “JavaScript”) test suite, in nightly builds of JavaScript engines, and visualizes at-a-glance status of feature implementation progress. Taking a […]

New Test262 Import and Runner in WebKit

Bocoup recently facilitated an update to the WebKit project’s interaction with Test262. In this article, I’ll cover what this means for the WebKit project and the JavaScript ecosystem, as well as what exactly has been done in the WebKit project to help make this process more repeatable. Test262 is a project maintained by Ecma’s TC39. […]

The State of Fieldset Interoperability

We recently started working with browser implementers to improve the state of fieldset, the 21 year old feature in HTML, that provides form accessibility benefits to assistive technologies like screen readers. It suffers from a number of interoperability bugs that make it difficult for web developers to use. Here is an example form grouped with […]

WPT Workshop Report

On June 13, operations screeched to a halt here at Bocoup. The phones were ringing, but we didn’t answer them. Packages delivered to our door went ignored. Chicken eggs piled up. All hands were on keyboards, collaborating on the web-platform-tests project. We’ve been participating in WPT for years, largely in collaboration with the Chromium, Gecko […]

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Ergonomic Testing with Webpack, Part One, File Resolving

This is part one in a series on the intersection of module bundlers and testing frameworks. Our focus will be webpack and jest but the techniques explored here can be reused with other tools as well. Modern websites and applications are routinely built by combining hundreds of small JavaScript modules. In order to increase the […]