add coverage with taurpalin

.github/workflows/rust.yml

@@ -11,8 +11,37 @@ env:
 
 jobs:
   test:
+    name: Test
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - name: Checkout repository
+      uses: actions/checkout@v2
     - name: Run tests
       run: cargo test --verbose
+
+  coverage:
+    # template: https://github.com/marketplace/actions/rust-tarpaulin
+    name: Coverage
+    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/tarpaulin@v0.1
+        with:
+          version: '0.9.0'
+          args: '-- --test-threads 1'
+      - name: Upload to codecov.io
+        uses: codecov/codecov-action@v1.0.2
+        with:
+          token: ${{secrets.CODECOV_TOKEN}}
+      - name: Archive code coverage results
+        uses: actions/upload-artifact@v1
+        with:
+          name: code-coverage-report
+          path: cobertura.xml

README.md

@@ -1,6 +1,7 @@
 # LeetCode in Rust
 
 ![Unittest](https://github.com/jtr109/leetcode-in-rust/workflows/Unittest/badge.svg)
+[![codecov](https://codecov.io/gh/jtr109/leetcode-in-rust/branch/master/graph/badge.svg)](https://codecov.io/gh/jtr109/leetcode-in-rust)
 
 Resolving problems of LeetCode in RustLang.