test(coverage): migrate from tarpaulin to llvm-cov

.github/workflows/test.yml

@@ -17,16 +17,19 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           toolchain: 1.76.0
+      - name: Install cargo-llvm-cov
+        uses: taiki-e/install-action@cargo-llvm-cov
       - name: Run documentation tests
         run: make test-doc
         env:
           MISTRAL_API_KEY: ${{ secrets.MISTRAL_API_KEY }}
       - name: Run tests (with coverage)
-        run: make test-cover
+        run: cargo llvm-cov --lcov --output-path ./lcov.info
         env:
           MISTRAL_API_KEY: ${{ secrets.MISTRAL_API_KEY }}
       - name: Upload tests coverage
         uses: codecov/codecov-action@v4
         with:
           fail_ci_if_error: true
+          files: ./lcov.info
           token: ${{ secrets.CODECOV_TOKEN }}

CONTRIBUTING.md

@@ -38,7 +38,8 @@ Then edit the `.env` file to set your `MISTRAL_API_KEY`.
 
 ### Optional requirements
 
-- [cargo-watch](https://github.com/watchexec/cargo-watch#install) for `make test-*-watch`.
+- [cargo-llvm-cov](https://github.com/taiki-e/cargo-llvm-cov?tab=readme-ov-file#installation) for `make test-cover`
+- [cargo-watch](https://github.com/watchexec/cargo-watch#install) for `make test-watch`.
 
 ### Test
 

Makefile

@@ -38,7 +38,7 @@ release-major:
 test:
 	@$(source_env_if_not_ci) && cargo test --no-fail-fast
 test-cover:
-	@$(source_env_if_not_ci) && cargo tarpaulin --frozen --out Xml --skip-clean
+	@$(source_env_if_not_ci) && cargo llvm-cov
 test-doc:
 	@$(source_env_if_not_ci) && cargo test --doc --no-fail-fast
 test-watch: