WASM coverage

.cargo/config.toml

@@ -0,0 +1,2 @@
+[target.wasm32-unknown-unknown]
+runner = "wasm-bindgen-test-runner"

.github/workflows/ci.yml

@@ -78,6 +78,115 @@ jobs:
       - name: Run unit tests (cross build)
         run: cross test --all-targets --all-features --target ${{ matrix.target }}
 
+  tests-wasm:
+    name: Unit tests (WASM, stable)
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Install wasm-pack
+        run: curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+
+      - name: Run Wasm tests
+        run: wasm-pack test --chrome --headless
+
+  wasm-coverage:
+    name: Unit tests (WASM, nightly, code coverage)
+    runs-on: ubuntu-24.04
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Install `wasm-bindgen-cli`
+        uses: taiki-e/install-action@v2
+        with:
+          tool: wasm-bindgen-cli
+
+      - name: Install Clang v18 & jq
+        run: |
+          sudo apt-get install clang-18 jq
+          which jq
+
+      - name: Install Rust nightly
+        run: |
+          rustup toolchain install nightly --profile minimal --target wasm32-unknown-unknown
+          rustup default nightly
+          rustc --version --verbose
+
+      - name: Run tests
+        env:
+          CHROMEDRIVER: chromedriver
+          CARGO_HOST_RUSTFLAGS: --cfg=wasm_bindgen_unstable_test_coverage
+          RUSTFLAGS:
+            -Cinstrument-coverage -Zcoverage-options=condition -Zno-profiler-runtime --emit=llvm-ir
+            --cfg=wasm_bindgen_unstable_test_coverage
+          WASM_BINDGEN_UNSTABLE_TEST_PROFRAW_OUT: coverage-output
+        run: |
+          mkdir coverage-output
+          cargo test --target wasm32-unknown-unknown -Ztarget-applies-to-host -Zhost-config --tests
+
+      - name: Prepare object files
+        env:
+          CARGO_HOST_RUSTFLAGS: --cfg=wasm_bindgen_unstable_test_coverage
+          RUSTFLAGS:
+            -Cinstrument-coverage -Zcoverage-options=condition -Zno-profiler-runtime --emit=llvm-ir
+            --cfg=wasm_bindgen_unstable_test_coverage
+        run: |
+          mkdir coverage-input
+          crate_name=identity_core
+          IFS=$'\n'
+          for file in $(
+            cargo test --target wasm32-unknown-unknown -Ztarget-applies-to-host -Zhost-config --tests --no-run --message-format=json | \
+            jq -r "select(.reason == \"compiler-artifact\") | (select(.target.kind == [\"lib\"] and .target.name == \"$crate_name\")) | .filenames[0]"
+          )
+          do
+            if [[ ${file##*.} == "rlib" ]]; then
+                base=$(basename $file .rlib)
+                file=$(dirname $file)/${base#"lib"}.ll
+            else
+                file=$(dirname $file)/$(basename $file .wasm).ll
+            fi
+
+            input=coverage-input/$(basename $file)
+            cp $file $input
+
+            perl -i -p0e 's/(^define.*?$).*?^}/$1\nstart:\n  unreachable\n}/gms' $input
+            counter=1
+            while (( counter != 0 )); do
+                counter=$(perl -i -p0e '$c+= s/(^(define|declare)(,? [^\n ]+)*),? range\(.*?\)/$1/gm; END{print "$c"}' $input)
+            done
+
+            clang-18 $input -Wno-override-module -c -o coverage-output/$(basename $input .ll).o
+          done
+
+      - name: Merge profile data
+        run:
+          llvm-profdata-18 merge -sparse coverage-output/*.profraw -o
+          coverage-output/coverage.profdata
+
+      - name: Generate coverage report
+        run: |
+          objects=()
+          for file in $(ls coverage-output/*.o)
+          do
+            objects+=(-object $file)
+          done
+          llvm-cov-18 show -show-instantiations=false -output-dir coverage-output -format=html -instr-profile=coverage-output/coverage.profdata ${objects[@]} -sources src
+          llvm-cov-18 export -format=lcov -instr-profile=coverage-output/coverage.profdata -ignore-filename-regex='\/tests\/' ${objects[@]} -sources src > lcov.info
+
+      - name: Upload code coverage results
+        uses: codecov/codecov-action@v3
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          fail_ci_if_error: true
+          verbose: true
+
   test-default-disabled:
     name: Unit tests with default features disabled
     runs-on: ${{ matrix.os }}