fail ci under 80% test cov

Author: bbelderbos

.github/workflows/rust.yml

@@ -64,3 +64,20 @@ jobs:
     #   run: cargo build --verbose
     - name: Run tests
       run: cargo test --verbose
+
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Cache
+      uses: actions/cache@v4
+      with:
+        path: |
+          ~/.cargo/registry
+          ~/.cargo/git
+          target
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+    - name: Install tarpaulin
+      run: cargo install cargo-tarpaulin
+    - name: Run coverage
+      run: cargo tarpaulin --fail-under 80