Merge pull request #1921 from GoogleCloudPlatform/coverage

Implement code coverage checks

.github/.codecov.yml

@@ -0,0 +1,20 @@
+codecov:
+  strict_yaml_branch: master
+coverage:
+  round: down
+  precision: 2
+  status:
+    changes: true
+    project:
+      default:
+        target: 60%
+        threshold: 0%
+        flags:
+          - "unittest"
+    patch:
+      default:
+        target: 80%
+        threshold: 0%
+        flags:
+          - "unittest"
+

.github/workflows/codecov.yml

@@ -0,0 +1,31 @@
+name: Code Coverage
+on: [push, pull_request]
+jobs:
+  codecov:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: 1.22.x
+          cache: false
+
+      - name: Download dependencies
+        run: go mod download
+
+      - name: Test and coverage
+        run: CGO_ENABLED=0 go test -p 1 -covermode=atomic -v -coverprofile=coverage.out ./...
+
+      - name: Upload coverage reports to Codecov
+        uses: codecov/codecov-action@v4.3.1
+        timeout-minutes: 5
+        with:
+          fail_ci_if_error: true
+          token: ${{ secrets.CODECOV_TOKEN }}
+          flags: unittests
+