Fixes #165 - sonarcloud coverage

Generate `coverage.xml` and upload it to SonarCloud to fix the missing
coverage notice in SonarCloud's comments.

.github/workflows/tests.yml

@@ -46,4 +46,16 @@ jobs:
       run: |
         pip install .[ci]
         nox -e tests
-        nox -e cover
+    - name: SonarCloud Scan
+      uses: SonarSource/sonarcloud-github-action@master
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}  # Needed to get PR information, if any
+        SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+      with:
+          args: >
+            -Dsonar.organization="${GITHUB_REPOSITORY%/*}"
+            -Dsonar.projectKey="${GITHUB_REPOSITORY#*/}"
+            -Dsonar.python.coverage.reportPaths=coverage.xml
+            -Dsonar.sources=canu/,network_modeling
+            -Dsonar.test.exclusions=tests/**
+            -Dsonar.tests=tests/

.gitignore

@@ -28,7 +28,7 @@ build_version
 pip-log.txt
 
 # Unit test / coverage reports
-.coverage
+*coverage*
 .nox
 .tox
 .cache

noxfile.py

@@ -56,7 +56,7 @@ def tests(session):
     session.run(
         "pytest",
         "--log-level=ERROR",
-        "--cov-report=",
+        "--cov-report=xml",
         f"--cov-fail-under={COVERAGE_FAIL}",
         "--cov=canu",
         "--cov=tests",