build: fix test ci checkout

.github/workflows/test.yml

@@ -20,6 +20,8 @@ jobs:
       with:
         egress-policy: audit
 
+    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+
     - name: Use Node.js ${{ matrix.node-version }}
       uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
       with:
@@ -31,4 +33,8 @@ jobs:
     - name: Install dependencies
       run: npm ci
     - name: npm test
+      if: matrix.node-version != '20.x'
       run: npm run node:test
+    - name: npm test with amaro
+      if: matrix.node-version == '20.x'
+      run: NODE_OPTIONS="--import=./tools/strip.js" npm run node:test

package.json

@@ -8,5 +8,8 @@
   },
   "devDependencies": {
     "@types/node": "^24.10.1"
+  },
+  "dependencies": {
+    "amaro": "^1.1.5"
   }
 }

tools/loader.js

@@ -0,0 +1,24 @@
+import path from 'node:path';
+
+export async function resolve(specifier, context, nextResolve) {
+  const result = await nextResolve(specifier, context);
+  const ext = path.extname(new URL(result.url).pathname);
+  if (ext === '.ts') {
+    return {
+      ...result,
+      format: 'module',
+    };
+  }
+  return result;
+}
+
+export async function load(url, context, nextLoad) {
+  const ext = path.extname(new URL(url).pathname);
+  if (ext === '.ts') {
+    return nextLoad(url, {
+      ...context,
+      format: 'module-typescript',
+    });
+  }
+  return nextLoad(url, context);
+}

tools/strip.js

@@ -0,0 +1,4 @@
+import { register } from 'node:module';
+import 'amaro/strip';
+
+register('./loader.js', import.meta.url);