testing (7 lessons)
Lesson 029: Ground-Truth Recovery as Optimizer Validation
We have a calendar optimizer that selects 13 images from 12,217 using a weighted objective function (popularity, diversi...
Lesson 044: Acceptance Tests as Executable Specifications
The biased voting blocks pipeline spans six components: config validation, vote generation, attribute analysis, cluster ...
Lesson 057: Test-Gated Commits at Scale
Gate every commit on a passing test suite, not on "the feature looks done." With 1,500+ tests across a project, the suit...
AI-Graded Content Validation
Large question banks authored by multiple sources (human or AI) accumulate factual errors that are invisible to structur...
Integration Testing a DOM Application with jsdom
A browser-based application that uses DOM APIs (querySelector, innerHTML, addEventListener) can be integration-tested in...
Testing Provider Detection Logic
When critical logic is embedded in a class that's hard to test (DOM-coupled UI class), developers sometimes copy the log...