ci: attempt to add codecoverage

.github/workflows/test_suite.yml

@@ -24,17 +24,40 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: recursive
+
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           toolchain: nightly
+          components: llvm-tools-preview
+
+      - name: Install grcov
+        uses: taiki-e/install-action@v2
+        with:
+          tool: grcov
+
+      - name: Build
+        run: cargo build --verbose --all-targets
+        env:
+          RUSTFLAGS: "-Cinstrument-coverage"
+
       - name: Start minio
         run: ./ci/minio_start.sh
-      - run: cargo test --all-features -- -Z unstable-options --format json --report-time | tee results.json
+
+      - name: Test
+        run: cargo test --all-features -- -Z unstable-options --format json --report-time | tee results.json
+        env:
+          LLVM_PROFILE_FILE: "target/coverage/prof/%p-%m.profraw"
+          RUSTFLAGS: "-Cinstrument-coverage"
+
+      - name: Stop minio
+        run: ./ci/minio_stop.sh
+
       - name: Prepare junit report
         id: cargo_reporter
         uses:  innoq/action-cargo-test-report@v1
         with:
           cargo-test-report-json: 'results.json'
+
       - name: Publish Test Report
         uses: mikepenz/action-junit-report@v4
         if: always() # always run even if the previous step fails
@@ -44,8 +67,24 @@ jobs:
           require_tests: true
           annotate_only: true
           summary: ${{ steps.cargo_reporter.outputs.summary }}
-      - name: Stop minio
-        run: ./ci/minio_stop.sh
+
+      - name: Create coverage report
+        run: |
+          grcov \
+            --source-dir . \
+            --binary-path target/debug \
+            --branch \
+            --excl-start 'mod tests \{' \
+            --ignore 'tests/*' \
+            -t lcov \
+            -o lcov.info \
+            target/coverage/prof
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          files: lcov.info
+          fail_ci_if_error: false
 
   # Check formatting with rustfmt
   formatting: