Test coverage module to generate a lcov.info
file for an Elixir project.
The docs can be found at https://hexdocs.pm/lcov_ex.
Many test coverage tools use lcov
files as an input to generate reports.
You can use it as I do to watch inline coverage progress with the following editors:
- VSCode, using the Coverage Gutters extension.
- Atom, using the lcov-info extension (it requires you to change the output folder to "coverage", see below).
Please let me know if you made it work in your previously unlisted favorite editor. Or, if you're really nice, just add it to this list yourself 🙂
Add to your dependencies:
def deps do
[
{:lcov_ex, "~> 0.2", only: [:dev, :test], runtime: false}
]
end
mix lcov
File should be created at ./cover/lcov.info
by default.
Alternatively, you can set up LcovEx
as your test coverage tool in your project configuration:
def project do
[
...
test_coverage: [tool: LcovEx, output: "cover"],
...
]
And then, run with:
mix test --cover
The output
option indicates the output folder for the generated file.
Optionally, the ignore_paths
option can be a list of prefixes to ignore when generating the coverage report.
def project do
[
...
test_coverage: [tool: LcovEx, output: "cover", ignore_paths: ["test/"]]
...
]
- Add missing
FN
lines, for the sake of completion.