WIP: test workflow?

.github/workflows/build.yml

@@ -0,0 +1,53 @@
+name: Build & Test WASM
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: '1.23'
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+
+      - name: Clone kobopatch source
+        run: |
+          cd kobopatch-wasm
+          ./setup.sh
+
+      - name: Run native tests
+        run: |
+          cd kobopatch-wasm/kobopatch-src
+          go test ./...
+
+      - name: Run WASM tests
+        run: |
+          cd kobopatch-wasm/kobopatch-src
+          GOOS=js GOARCH=wasm go test -exec="$(go env GOROOT)/lib/wasm/go_js_wasm_exec" ./...
+
+      - name: Build WASM binary
+        run: |
+          cd kobopatch-wasm
+          ./build.sh
+
+      - name: Upload WASM artifact
+        if: false
+        uses: actions/upload-artifact@v4
+        with:
+          name: kobopatch-wasm
+          path: |
+            kobopatch-wasm/kobopatch.wasm
+            kobopatch-wasm/wasm_exec.js