Add coverage badge

Author: floatdrop

.github/workflows/ci.yaml

@@ -17,5 +17,29 @@ jobs:
       - name: Build
         run: go build -v ./...
       - name: Test with the Go CLI
-        run: go test
+        run: |
+          go test -v ./... -covermode=count -coverprofile=coverage.out
+          go tool cover -func=coverage.out -o=coverage.out
+      - name: Go Coverage Badge  # Pass the `coverage.out` output to this action
+        uses: tj-actions/coverage-badge-go@v2
+        with:
+          filename: coverage.out
+      - name: Verify Changed files
+        uses: tj-actions/verify-changed-files@v16
+        id: verify-changed-files
+        with:
+          files: README.md
+      - name: Commit changes
+        if: steps.verify-changed-files.outputs.files_changed == 'true'
+        run: |
+          git config --local user.email "action@github.com"
+          git config --local user.name "GitHub Action"
+          git add README.md
+          git commit -m "chore: Updated coverage badge."
+      - name: Push changes
+        if: steps.verify-changed-files.outputs.files_changed == 'true'
+        uses: ad-m/github-push-action@master
+        with:
+          github_token: ${{ github.token }}
+          branch: ${{ github.head_ref }}
 

README.md

@@ -1,6 +1,7 @@
 # RingChan
 
 [![CI](https://github.com/floatdrop/ringchan/actions/workflows/ci.yaml/badge.svg)](https://github.com/floatdrop/ringchan/actions/workflows/ci.yaml)
+![Coverage](https://img.shields.io/badge/Coverage-100.0-brightgreen)
 [![Go Report Card](https://goreportcard.com/badge/github.com/floatdrop/ringchan)](https://goreportcard.com/report/github.com/floatdrop/ringchan)
 [![Go Reference](https://pkg.go.dev/badge/github.com/floatdrop/ringchan.svg)](https://pkg.go.dev/github.com/floatdrop/ringchan)
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)