Simon Willison’s Weblog

Rails 1.2.1 Impression. I hadn’t seen assert_select before, which lets you unit test generated HTML using CSS selectors; a really neat idea.

Posted 15th February 2007 at 9:14 am

Recent articles

Highlights from my appearance on the Data Renegades podcast with CL Kao and Dori Wilson - 26th November 2025
Claude Opus 4.5, and why evaluating new LLMs is increasingly difficult - 24th November 2025
sqlite-utils 4.0a1 has several (minor) backwards incompatible changes - 24th November 2025

assertselect 1 css 229 rails 72 unittests 13

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