Simon de Lang

(1)

Creator of Stryker Mutator, started as his thesis project at Info Support. Pioneered mutation testing for JavaScript and TypeScript.

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Notes (1)

Stryker Mutator

by simon-de-lang

Code coverage measures what runs, but mutation testing reveals whether your tests actually catch bugs by deliberately breaking code and checking if tests fail.

testing mutation-testing code-quality javascript typescriptJan 10, 2026