go-testcov

go test that fails on untested lines and shows them

• 🎉 Instant, actionable feedback on 💚 test run
• 🎉 Onboard legacy code with top of the file // untested sections: 5 comment
• 🎉 Mark untested code sections with inline // untested section comment
• 🚫 PRs with bad test coverage
• 🚫 External/paid coverage tools

go get github.com/grosser/go-testcov
go-testcov . # same arguments as `go test` uses
...
test output
...
pkg.go new untested sections introduced (1 current vs 0 configured)
pkg.go:20.14,21.11
pkg.go:54.5,56.5

Notes

• coverage in go
• Runtime overhead for coverage is about 3%
• Use -covermode atomic when testing parallel algorithms
• To keep the coverage.out file run with -cover

Development

Run go-testcov on itself:

go install
cd test
go-testcov

all tests are in test/ so the main library does not force installation of gomega + ginkgo

Author

Michael Grosser
[email protected]
License: MIT