Added CodeCov workflow (#19)

+ Set up codecov workflow as discussed in today's meet
+ Added a `codecov.yml` config file

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

.github/codecov.yml

@@ -0,0 +1,10 @@
+codecov:
+  token: ${{ secrets.CODECOV_TOKEN }}
+  ci:
+    - "test_on_push"
+  strict_yaml_branch: "main"
+  disable_default_path_fixes: no
+  require_ci_to_pass: yes
+
+github_checks:
+  annotations: true

.github/workflows/test_on_push.yml

@@ -6,6 +6,7 @@ on:
   push:
     branches:
     - main
+
 jobs:
   style:
     runs-on: ubuntu-latest
@@ -52,3 +53,13 @@ jobs:
       - name: Test Template Generation
         run: |
           nox -s test-generation
+
+      - name: Run coverage tests
+        if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.12'
+        run: python -m nox -s coverage
+
+      - name: Upload coverage report
+        if: matrix.os == 'ubuntu-latest' && matrix.python-version == '3.12'
+        uses: codecov/[email protected]
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}

noxfile.py

@@ -31,6 +31,14 @@ def run_template_generation(session):
     session.install("-e", ".[dev]", silent=False)
     session.run("pytest", "tests")
 
+@nox.session(name="coverage")
+def run_coverage(session):
+    """Run the coverage tests and generate an XML report."""
+    session.install("setuptools", silent=False)
+    session.install("coverage", silent=False)
+    session.install("-e", ".[all,dev,jax]", silent=False)
+    session.run("pytest", "--cov=src/pybamm_cookiecutter", "--cov-report=xml", "tests/")
+
 @nox.session(name="dev")
 def set_dev(session):
     """Install pybamm-cookiecutter in editable mode"""