# Coverage Tests with `cargo llvm-cov`
The coverage of this crate is tested by `cargo llvm-cov` and
[`grcov`](https://github.com/mozilla/grcov).
`cargo llvm-cov` works without any additional options.
However, since it doesn't have fine-grained exclusion control, it may mark
"expectedly" uncovered lines. To exclude those from function coverage,
using Nightly channel and the `unstable` feature will work (due to the
`coverage(off)` attribute). There's no control over line and region coverage.
## Comparison with `grcov`
* Unlike gcov-based `grcov`, branch coverage is not yet supported
as of this writing.
* Functions / methods are counted correctly.
## Known Issues
* Some lines of code may be incorrectly uncovered.