chore: collect coverage from Rust tests (#1470)

Co-authored-by: Will Manning <[email protected]>

.github/workflows/ci.yml

@@ -125,7 +125,6 @@ jobs:
       - name: Rust Build (${{matrix.config.name}})
         run: cargo hack ${{matrix.config.command}} ${{matrix.config.args}} --ignore-private
 
-
   rust-test:
     name: "Rust (tests)"
     runs-on: ubuntu-latest
@@ -152,7 +151,19 @@ jobs:
           done
       - name: Rust Test
         run: cargo test --workspace --all-features
-
+        env:
+          # Enable coverage using -Zprofile flag
+          RUSTFLAGS: '-Zprofile'
+          RUSTDOCFLAGS: '-Zprofile'
+      - uses: rraval/actions-rs-grcov@e96292badb0d33512d16654efb0ee3032a9a3cff
+        id: grcov
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Coveralls
+        uses: coverallsapp/github-action@v2
+        with:
+          file: "${{ steps.grcov.outputs.report }}"
+
   license-check-and-audit-check:
     name: License Check and Audit Check
     runs-on: ubuntu-latest