chore: add codecov (#1590)

* Added codecov

* Ignore tests

* Only run pytest with coverage in one job

* Use self-hosted CI

* Run all tests

* Use dev group

* Also upload test results

Author: ariostas

.github/workflows/build-test.yml

@@ -238,14 +238,35 @@ jobs:
             cupy
             kvikio
             nvcomp
+            pytest-cov
+            ${{ matrix.cuda-version == 13 && 'root' || '' }}
 
       - name: Pip install the package
-        run: pip install --group=test .
+        run: pip install --group=dev .
 
-      - name: Run pytest
+      - name: Run only GPU tests
+        if: matrix.cuda-version != 13
         run: |
           python -m pytest -vv tests-cuda --reruns 10 --reruns-delay 30 --only-rerun "(?i)http|ssl|timeout|expired|connection|socket"
 
+      - name: Run full test suite and collect coverage
+        if: matrix.cuda-version == 13
+        run: |
+          python -m pytest -vv tests tests-cuda --reruns 10 --reruns-delay 30 --only-rerun "(?i)http|ssl|timeout|expired|connection|socket"\
+                           --cov=uproot --cov-branch --cov-report=xml --junitxml=junit.xml -o junit_family=legacy
+
+      - name: Upload coverage reports to Codecov
+        if: matrix.cuda-version == 13
+        uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+
+      - name: Upload test results to Codecov
+        if: ${{ !cancelled() }}
+        uses: codecov/test-results-action@v1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+
   pass:
     if: always()
     needs: [build, vanilla-build, numpy1-build, pyodide-build]

codecov.yml

@@ -0,0 +1,22 @@
+codecov:
+  require_ci_to_pass: true
+
+comment:
+  layout: files
+
+coverage:
+  status:
+    project:
+      default:
+        # 'auto' sets the target to our current coverage %
+        # 'threshold' allows a tiny 0.5% drop to prevent "flaky" failures
+        target: auto
+        threshold: 0.5%
+    patch:
+      default:
+        # Ensures 98% of NEW code added in the PR is covered
+        target: 98%
+        threshold: 0%
+
+github_checks:
+  annotations: false