Mutation Testing: Did my test break my code ? 🤔
summary
Shows mutation testing applied to a simple calculator (Python and JavaScript) using MutPy and Stryker to generate mutants and run real tests; a 100% coverage suite initially produces 14 mutants with 5 survived (64% mutation score) in Python and 14 with 2 survived in JS, then reaches 100% after adding targeted tests. Reports export to HTML/JSON, tools integrate with CI, and large-scale use relies on incremental runs, filtering equivalent mutants and limiting mutants per line to control cost.
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chapters (6)
- 0:00Start
- 3:11What is Mutation Testing
- 4:18Why Do We Need Mutation Testing?
- 9:43Mutations Types
- 11:28Array Declaration
- 36:54Take Away!
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