Diff Cov

Simple CLI to print diffs highlighted with test coverage status

Installation

You can install the package with npm

npm i -g @adeattwood/diff-cov

You can run it directly with npx

npx @adeattwood/diff-cov

Setup

For diff-cov to get the diff to your default branch, you must set up your origin/HEAD ref. To test to see if you have this set up, run.

git rev-parse --abbrev-ref origin/HEAD

This should print out the origin ref to your default branch for this repo it will print origin/0.x. If you get an unknown ref error, then you will need to link origin/HEAD to your default branch with the below command.

git symbolic-ref refs/remotes/origin/HEAD refs/remotes/origin/0.x

Note: Make sure you change 0.x for your default branch name typically main or development

Usage

Before you run diff-cov you must run your test suite with coverage and output a lcov coverage file. You must also have all your changes committed to ensure it's included in the output.

Once you are ready to go, you can run diff-cov to print your diff highlighted with coverage status. Any line not included in the coverage report will not be highlighted and hit and missed lines will be colored green and red. You can use the --coverageFile flag to specify the path to your coverage report if its not in the default location of ./lcov.info

diff-cov
diff-cov --coverageFile coverage/lcov.info

A report is printed at the bottom and colored with a threshold of 90% anything below this percentage coverage will be colored red.