[#99] 테스트 커버리지 워크플로 추가

.github/workflows/coverage.yml

@@ -0,0 +1,40 @@
+name: Test & Coverage
+
+on:
+  pull_request:
+
+jobs:
+  check:
+    name: Rust project
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+
+      - name: Run cargo-tarpaulin
+        uses: actions-rs/[email protected]
+        with:
+          version: '0.15.0'
+          args: '-- --test-threads 1'
+
+      - name: Upload to codecov.io
+        uses: codecov/[email protected]
+        with:
+          token: ${{secrets.GH_TOKEN}}
+
+      - name: Archive code coverage results
+        uses: actions/upload-artifact@v1
+        with:
+          name: code-coverage-report
+          path: cobertura.xml
+
+      - name: read coverage report
+        run: |
+          echo "Coverage report"
+          cat cobertura.xml