GitHub Action: Upload test coverage to Codecov (#9)

Author: tangrufus

.github/workflows/go.yml

@@ -56,13 +56,30 @@ jobs:
           fi
 
   test:
-    runs-on: ubuntu-latest
     needs: diff
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
           go-version-file: 'go.mod'
       - run: go mod download
       - run: go mod verify
-      - run: go test -v -count=1 -race -shuffle=on ./...
+      - run: go test -v -count=1 -race -shuffle=on -coverprofile=coverage.out -covermode=atomic ./...
+      - uses: actions/upload-artifact@v4
+        with:
+          name: coverage
+          path: coverage.out
+
+  codecov:
+    needs: test
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          name: coverage
+      - uses: codecov/codecov-action@v4
+        with:
+          use_oidc: ${{ !(github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork) }}

README.md

@@ -7,6 +7,7 @@
 <div align="center">
 
 [![Go](https://github.com/typisttech/comver/actions/workflows/go.yml/badge.svg)](https://github.com/typisttech/comver/actions/workflows/go.yml)
+[![codecov](https://codecov.io/gh/typisttech/comver/graph/badge.svg?token=GVO7RV80TJ)](https://codecov.io/gh/typisttech/comver)
 [![Go Report Card](https://goreportcard.com/badge/github.com/typisttech/comver)](https://goreportcard.com/report/github.com/typisttech/comver)
 [![GitHub Release](https://img.shields.io/github/v/release/typisttech/comver?style=flat-square&)](https://github.com/typisttech/comver/releases/latest)
 [![Go Reference](https://pkg.go.dev/badge/github.com/typisttech/comver.svg)](https://pkg.go.dev/github.com/typisttech/comver)