Statement Coverage

ELI5 — The Vibe Check

Statement Coverage is the simplest coverage metric: what percentage of your code lines were actually executed during tests? 80% statement coverage means 20% of your code is untested. It's useful but misleading — you can hit every line without testing every scenario.

Real Talk

Statement coverage (line coverage) measures the percentage of executable code statements executed during testing. It's the most basic coverage metric, easy to achieve but insufficient alone — it doesn't ensure all branches or conditions are tested. Useful as a minimum threshold, not a quality indicator.

When You'll Hear This

"100% statement coverage doesn't mean 100% tested — it just means every line ran once." / "Our CI requires 80% statement coverage as a minimum bar, but we care more about branch coverage."