If you run “forge coverage” in a foundry project, you’ll get a table showing how much of your lines and branches are covered.
If you want to see visually which lines and branches are or are not covered, use the following steps
brew install genhtml
mkdir coverage
forge coverage --report lcov && genhtml lcov.info --branch-coverage --output-dir coverage
coverage/index.html
And you’ll be able to see a coverage report like what you see at the top of the page.
If you get this error, do
brew install ekhtml
and it will install genhtml.
This tutorial was created by Matteo Vendittoli, a student at the RareSkills blockchain bootcamp.
It is also possible to view line coverage directly inside Visual Studio Code. Credit to 0xasp_ on Twitter for sharing this with us (original tweet).
forge coverage --report lcov
Pick display coverage report
Originally Published Feb 8, 2023
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