Add code coverage badge (#344)

* Add code coverage badge with coveralls.io

* add manual trigger for workflow and cut to running on just one version of python

Author: jacalata

.github/workflows/check-coverage.yml

@@ -5,14 +5,15 @@ on:
   pull_request:
     branches:
       - development
+  workflow_dispatch:
 
 jobs:
   build:
     strategy:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ['3.12']
 
     runs-on: ${{ matrix.os }}
 
@@ -38,6 +39,10 @@ jobs:
     - name: Generate coverage report
       run: pytest --junitxml=pytest.xml --cov=tabcmd tests/ | tee pytest-coverage.txt
 
+    # trying another coverage reporter for PRs/badges
+    - name: Coveralls
+      uses: coverallsapp/github-action@v2
+
     - name: Comment on pull request with coverage
       uses: MishaKav/pytest-coverage-comment@main
       with:
@@ -46,10 +51,6 @@ jobs:
         # Error: The head commit for this pull_request event is not ahead of the base commit.
         # Please submit an issue on this action's GitHub repo
         # report-only-changed-files: true
-
-    # TODO update badge on readme:
-    # generate badge with https://pypi.org/project/coverage-badge/
-    # display it with https://github.com/Schneegans/dynamic-badges-action
-
+        
     # TODO track docstring coverage
     # https://github.com/marketplace/actions/python-interrogate-check

README.md

@@ -1,6 +1,8 @@
 # Tabcmd
 
 [![Tableau Supported](https://img.shields.io/badge/Support%20Level-Tableau%20Supported-53bd92.svg)](https://www.tableau.com/support-levels-it-and-developer-tools)
+
+[![Code coverage]([https://coveralls.io/repos/tableau/tabcmd/badge.png])(https://github.com/tableau/tabcmd/actions)
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
 [![Python tests](https://github.com/tableau/tabcmd/actions/workflows/run-tests.yml/badge.svg)](https://github.com/tableau/tabcmd/actions/workflows/run-tests.yml)
 [![Pypi smoke tests](https://github.com/tableau/tabcmd/actions/workflows/python-app.yml/badge.svg)](https://github.com/tableau/tabcmd/actions/workflows/python-app.yml)