(ci) Add test_emscripten stage

Author: khvzak

.github/workflows/main.yml

@@ -80,23 +80,36 @@ jobs:
           target: x86_64-apple-darwin
         - os: windows-latest
           target: x86_64-pc-windows-msvc
-        - os: ubuntu-latest
-          target: wasm32-unknown-emscripten
     steps:
     - uses: actions/checkout@v3
     - uses: dtolnay/rust-toolchain@stable
       with:
         target: ${{ matrix.target }}
-    - name: Install emscripten (wasm32-unknown-emscripten)
-      if: ${{ matrix.target == 'wasm32-unknown-emscripten' }}
+    - name: Run ${{ matrix.lua }} tests
+      run: |
+        cargo test --manifest-path testcrate/Cargo.toml --release --features ${{ matrix.lua }}
+      shell: bash
+
+  test_emscripten:
+    name: Test emscripten
+    runs-on: ubuntu-latest
+    needs: build
+    strategy:
+      matrix:
+        lua: [lua54, lua53, lua52, lua51]
+    steps:
+    - uses: actions/checkout@v3
+    - uses: dtolnay/rust-toolchain@stable
+      with:
+        target: wasm32-unknown-emscripten
+    - name: Install emscripten
       run: |
         sudo apt-get update -y
         sudo apt-get install -y --no-install-recommends emscripten
-        echo 'CARGO_TARGET_WASM32_UNKNOWN_EMSCRIPTEN_RUNNER=node' >> $GITHUB_ENV
-        echo 'RUSTFLAGS="-C link-args=-sERROR_ON_UNDEFINED_SYMBOLS=0"' >> $GITHUB_ENV
       shell: bash
     - name: Run ${{ matrix.lua }} tests
       run: |
+        export CARGO_TARGET_WASM32_UNKNOWN_EMSCRIPTEN_RUNNER=node
         cargo test --manifest-path testcrate/Cargo.toml --release --features ${{ matrix.lua }}
       shell: bash