Add codecov (#58)

Author: pavelzw

.github/workflows/ci.yml

@@ -39,8 +39,14 @@ jobs:
       - name: Run unittests
         uses: pavelzw/pytest-action@510c5e90c360a185039bea56ce8b3e7e51a16507
         with:
-          custom-pytest: pixi run -e ${{ matrix.env }} pytest
+          custom-pytest: pixi run -e ${{ matrix.env }} coverage
           report-title: ${{ matrix.env }}
+      - name: Upload coverage reports to Codecov
+        if: matrix.env == 'py312'
+        uses: codecov/codecov-action@54bcd8715eee62d40e33596ef5e8f0f48dbbccab
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+          file: ./coverage.xml
 
   pre-commit-checks:
     # TODO: switch to pixi once there is a good way

README.md

@@ -5,6 +5,7 @@
 [![conda-forge][conda-forge-badge]][conda-forge]
 [![pypi-version][pypi-badge]][pypi]
 [![python-version][python-version-badge]][pypi]
+[![codecov][codecov-badge]][codecov]
 
 [license-badge]: https://img.shields.io/github/license/quantco/polarify?style=flat-square
 [build-badge]: https://img.shields.io/github/actions/workflow/status/quantco/polarify/ci.yml?style=flat-square&branch=main
@@ -14,6 +15,8 @@
 [pypi]: https://pypi.org/project/polarify
 [pypi-badge]: https://img.shields.io/pypi/v/polarify.svg?style=flat-square&logo=pypi&logoColor=white
 [python-version-badge]: https://img.shields.io/pypi/pyversions/polarify?style=flat-square&logoColor=white&logo=python
+[codecov-badge]: https://codecov.io/gh/quantco/polarify/branch/main/graph/badge.svg
+[codecov]: https://codecov.io/gh/quantco/polarify
 
 Welcome to **polarIFy**, a Python function decorator that simplifies the way you write logical statements for Polars. With polarIFy, you can use Python's language structures like `if / elif / else` statements and transform them into `pl.when(..).then(..).otherwise(..)` statements. This makes your code more readable and less cumbersome to write. 🎉