add code coverage

.github/actions-rs/grcov.yml

@@ -0,0 +1,8 @@
+# grcov . -s . --binary-path ./target/debug/ -t html --branch --ignore-not-existing -o ./target/debug/coverage/
+source-dir: .
+binary-path: ./target/debug/
+output-type: lcov
+branch: true
+ignore-not-existing: true
+llvm: true
+output-path: ./lcov.info

.github/workflows/rust.yml

@@ -22,5 +22,25 @@ jobs:
       run: cargo fmt -- --check
     - name: Clippy
       run: cargo clippy --all-features -- -D warnings
-    - name: Run tests
-      run: cargo test --all-features --verbose -- --test-threads=1
+    - uses: actions-rs/toolchain@v1
+      with:
+        toolchain: nightly
+        override: true
+    - uses: actions-rs/cargo@v1
+      with:
+        command: clean
+    - uses: actions-rs/cargo@v1
+      with:
+        command: test
+        args: --all-features --no-fail-fast --verbose -- --test-threads=1
+      env:
+        CARGO_INCREMENTAL: '0'
+        RUSTFLAGS: '-Zprofile -Ccodegen-units=1 -Cinline-threshold=0 -Clink-dead-code -Coverflow-checks=off -Cpanic=abort -Zpanic_abort_tests -Cinstrument-coverage -Copt-level=0'
+        RUSTDOCFLAGS: '-Zprofile -Ccodegen-units=1 -Cinline-threshold=0 -Clink-dead-code -Coverflow-checks=off -Cpanic=abort -Zpanic_abort_tests -Cinstrument-coverage -Copt-level=0'
+    - uses: actions-rs/grcov@0.2-proto
+    - name: Codecov
+      uses: codecov/codecov-action@v3
+      with:
+        verbose: true
+        fail_ci_if_error: true
+        files: lcov.info