lcov_ex

Test coverage module to generate a lcov.info file for an Elixir project.

The docs can be found at https://hexdocs.pm/lcov_ex.

Why

Many test coverage tools use lcov files as an input to generate reports.

I use it to see inline coverage progress in vscode with the Coverage Gutters extension.

Installation

Add to your dependencies:

def deps do
  [
    {:lcov_ex, "~> 0.1.0"}
  ]
end

Then, select LcovEx as your test coverage tool in your project configuration:

def project do
  [
    ...
    test_coverage: [tool: LcovEx],
    ...
  ]

Usage

Run tests with coverage:

mix test --cover

File should be created at ./cover/lcov.info by default.

TODOs

• Add missing FN lines, for the sake of completion.
• Make it work as a Task to avoid overwriting the test_coverage tool config.