Add integration test

.github/workflows/ci.yml

@@ -8,12 +8,12 @@ on:
 
 env:
   BUILD_ARTIFACT_NAME: build_artifact
-  BUILD_ARTIFACT_FILENAME: build_artifact.tgz
 
 jobs:
   build:
     runs-on: ubuntu-latest
-
+    outputs:
+      tarball: ${{ steps.tarball.outputs.filename }}
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
@@ -22,12 +22,13 @@ jobs:
       - run: npm ci
       - run: npm run test:ci
       - name: Make build tarball
-        run: mv "$(npm pack | tail -1)" $BUILD_ARTIFACT_FILENAME
+        id: tarball
+        run: echo "filename=$(npm pack | tail -1)" >> $GITHUB_OUTPUT
       - name: Archive build dist
         uses: actions/upload-artifact@v4
         with:
           name: ${{ env.BUILD_ARTIFACT_NAME }}
-          path: ${{ env.BUILD_ARTIFACT_FILENAME }}
+          path: ${{ steps.tarball.outputs.filename }}
 
   packageTest:
     needs: build
@@ -47,15 +48,23 @@ jobs:
     #       - 22
     #       - 23
 
+    env:
+      BUILD_ARTIFACT_FILENAME: ${{ needs.build.outputs.tarball }}
+
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
           # node-version: ${{ matrix.node-version }}
           cache: 'npm'
+      - run: cd integration_tests
       - name: Download the build artifact
         uses: actions/download-artifact@v4
         with:
           name: ${{ env.BUILD_ARTIFACT_NAME }}
-      - run: npm install $BUILD_ARTIFACT_FILENAME --only=prod
-      - run: ls node_modules
+      - name: Integration test - esm
+        run: |
+          cd esm && \
+          ls .. && \
+          npm install "../$BUILD_ARTIFACT_FILENAME" --only=prod && \
+          npm run test

integration_tests/esm/index.js

@@ -0,0 +1,33 @@
+import { assert } from 'node:assert';
+import { newServer } from 'mock-xmlhttprequest';
+
+function functionToTest() {
+  return new Promise((resolve, reject) => {
+    const xhr = new XMLHttpRequest();
+    xhr.open('GET', '/my/url');
+    xhr.onload = () => resolve(JSON.parse(xhr.response));
+    xhr.onerror = () => reject(xhr.statusText);
+    xhr.send();
+  });
+}
+
+const server = newServer({
+  get: ['/my/url', {
+    // status: 200 is the default
+    headers: { 'Content-Type': 'application/json' },
+    body: '{ "message": "Success!" }',
+  }],
+});
+
+async function integrationTest() {
+  try {
+    server.install();
+    const result = await functionToTest();
+    assert.equal(result.message, 'Success!');
+  } finally {
+    // Restore the original XMLHttpRequest
+    server.remove();
+  }
+}
+
+integrationTest();

integration_tests/esm/package.json

@@ -0,0 +1,11 @@
+{
+  "name": "mock-xmlhttprequest-integration-test-esm",
+  "description": "Integration test for XMLHttpRequest in a Node.js module project",
+  "type": "module",
+  "scripts": {
+    "test": "node index.js"
+  },
+  "engines": {
+    "node": ">=16.0.0"
+  }
+}