feat: bundler (esbuild, nextjs) integration tests

.github/scripts/pr-title-check.js

@@ -10,12 +10,10 @@ const isValidType = (title) =>
 const validateTitle = (title) => {
   if (!isValidType(title)) {
     console.error(
-      `PR title does not follow the required format.
-      example: "type: My PR Title"
-
-      - type: "feat", "fix", "chore", or "refactor"
-      - First letter of the PR title needs to be lowercased
-      `,
+      `PR title does not follow the required format "[type]: [title]".
+- Example: "fix: email compatibility issue"
+- Allowed types: 'feat', 'fix', 'chore', 'refactor'
+- First letter of the title portion (after the colon) must be lowercased`,
     );
     process.exit(1);
   }

.github/workflows/lint.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493
       - name: pnpm setup
-        uses: pnpm/action-setup@f2b2b233b538f500472c7274c7012f57857d8ce0
+        uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061
       - name: Install packages
         run: pnpm install
       - name: Run Lint

.github/workflows/preview-release.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Find changed files
         id: changed_files
         if: github.event_name == 'pull_request'
-        uses: tj-actions/changed-files@212f9a7760ad2b8eb511185b841f3725a62c2ae0
+        uses: tj-actions/changed-files@d6f020b1d9d7992dcf07f03b14d42832f866b495
         with:
           files: src/**/*
           dir_names: true

.github/workflows/tests.yml

@@ -23,7 +23,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493
       - name: pnpm setup
-        uses: pnpm/action-setup@f2b2b233b538f500472c7274c7012f57857d8ce0
+        uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061
       - name: Install packages
         run: pnpm install
       - name: Run Tests

.gitignore

@@ -1,3 +1,4 @@
 node_modules
 dist
 build
+.env.test

integrations/esbuild/.gitignore

@@ -0,0 +1 @@
+index.js

integrations/esbuild/index.ts

@@ -0,0 +1,3 @@
+import { Resend } from 'resend';
+
+new Resend('');

integrations/esbuild/package.json

@@ -0,0 +1,9 @@
+{
+  "dependencies": {
+    "esbuild": "0.25.11",
+    "resend": "../.."
+  },
+  "scripts": {
+    "build": "esbuild ./index.ts --bundle --platform=node --target=node18 --outfile=./index.js"
+  }
+}

integrations/integrations.spec.ts

@@ -0,0 +1,93 @@
+import { spawnSync } from 'node:child_process';
+import fs from 'node:fs';
+import os from 'node:os';
+import path from 'node:path';
+
+describe('integrations', () => {
+  const sdkPath = path.resolve(__dirname, '..');
+
+  beforeAll(() => {
+    const build = spawnSync('pnpm build', {
+      stdio: 'inherit',
+      cwd: path.resolve(__dirname, '..'),
+      shell: true,
+    });
+    if (build.status !== 0) {
+      throw new Error('SDK build failed');
+    }
+  });
+
+  /**
+   * Create an extra temporary copy of the given integration so that there's @react-email/render module resolution from ../node_modules
+   *
+   * Also modifies the package.json to point to the SDK with an absolute path.
+   */
+  async function prepareTemporaryIntegrationCopy(integrationPath: string) {
+    const temporaryIntegrationPath = path.resolve(
+      os.tmpdir(),
+      `resend-node-integration-${path.basename(integrationPath)}`,
+    );
+    if (fs.existsSync(temporaryIntegrationPath)) {
+      await fs.promises.rm(temporaryIntegrationPath, {
+        recursive: true,
+        force: true,
+      });
+    }
+    await fs.promises.mkdir(temporaryIntegrationPath, { recursive: true });
+    await fs.promises.cp(
+      path.resolve(__dirname, integrationPath),
+      temporaryIntegrationPath,
+      {
+        recursive: true,
+      },
+    );
+
+    const testingLockPackageJson: { dependencies: Record<string, string> } =
+      JSON.parse(
+        await fs.promises.readFile(
+          path.resolve(temporaryIntegrationPath, 'package.json'),
+          'utf8',
+        ),
+      );
+    testingLockPackageJson.dependencies.resend = sdkPath;
+    await fs.promises.writeFile(
+      path.resolve(temporaryIntegrationPath, 'package.json'),
+      JSON.stringify(testingLockPackageJson, null, 2),
+    );
+
+    return temporaryIntegrationPath;
+  }
+
+  test('nextjs', { timeout: 30_000 }, async () => {
+    const temporaryNextApp = await prepareTemporaryIntegrationCopy('./nextjs');
+
+    const buildInstall = spawnSync(
+      'npm install --install-links && npm run build',
+      {
+        stdio: 'inherit',
+        cwd: temporaryNextApp,
+        shell: true,
+      },
+    );
+    if (buildInstall.status !== 0) {
+      throw new Error('next.js build failed');
+    }
+  });
+
+  test('esbuild', { timeout: 30_000 }, async () => {
+    const temporaryIntegration =
+      await prepareTemporaryIntegrationCopy('./esbuild');
+
+    const buildInstall = spawnSync(
+      'npm install --install-links && npm run build',
+      {
+        stdio: 'inherit',
+        cwd: temporaryIntegration,
+        shell: true,
+      },
+    );
+    if (buildInstall.status !== 0) {
+      throw new Error('next.js build failed');
+    }
+  });
+});

integrations/nextjs/.gitignore

@@ -0,0 +1,42 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+package-lock.json
+/node_modules
+/.pnp
+.pnp.*
+.yarn/*
+!.yarn/patches
+!.yarn/plugins
+!.yarn/releases
+!.yarn/versions
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+
+# env files (can opt-in for committing if needed)
+.env*
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts

integrations/nextjs/app/route.js

@@ -0,0 +1,7 @@
+import { Resend } from 'resend';
+
+export function GET() {
+  new Resend('');
+
+  return new Response('Hello from this API route!', { status: 200 });
+}

integrations/nextjs/next.config.js

@@ -0,0 +1 @@
+module.exports = {};

integrations/nextjs/package.json

@@ -0,0 +1,11 @@
+{
+  "dependencies": {
+    "next": "15.5.6",
+    "react": "19.2.0",
+    "react-dom": "19.2.0",
+    "resend": "../.."
+  },
+  "scripts": {
+    "build": "next build"
+  }
+}

package.json

@@ -1,6 +1,6 @@
 {
   "name": "resend",
-  "version": "6.2.2",
+  "version": "6.3.0-canary.1",
   "description": "Node.js library for the Resend API",
   "main": "./dist/index.js",
   "module": "./dist/index.mjs",
@@ -28,21 +28,26 @@
     "format": "biome format --write .",
     "format:apply": "biome check --write .",
     "format:check": "biome format .",
+    "integration:nextjs": "cd ./integrations/nextjs && next build --turbopack",
     "lint": "biome check .",
     "prepublishOnly": "pnpm run build",
     "test": "vitest run",
-    "test:watch": "vitest"
+    "test:dev": "cross-env TEST_MODE=dev vitest run",
+    "test:integrations": "vitest run integrations",
+    "test:record": "rimraf --glob \"**/__recordings__\" && cross-env TEST_MODE=record vitest run",
+    "test:watch": "vitest",
+    "typecheck": "tsc --noEmit"
   },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/resendlabs/resend-node.git"
+    "url": "git+https://github.com/resend/resend-node.git"
   },
   "author": "",
   "license": "MIT",
   "bugs": {
-    "url": "https://github.com/resendlabs/resend-node/issues"
+    "url": "https://github.com/resend/resend-node/issues"
   },
-  "homepage": "https://github.com/resendlabs/resend-node#readme",
+  "homepage": "https://github.com/resend/resend-node#readme",
   "dependencies": {
     "svix": "1.76.1"
   },
@@ -55,14 +60,20 @@
     }
   },
   "devDependencies": {
-    "@biomejs/biome": "2.2.0",
-    "@types/node": "22.18.6",
-    "@types/react": "19.1.15",
+    "@biomejs/biome": "2.2.5",
+    "@pollyjs/adapter-fetch": "6.0.7",
+    "@pollyjs/core": "6.0.6",
+    "@pollyjs/persister-fs": "6.0.6",
+    "@types/node": "22.18.9",
+    "@types/react": "19.2.0",
+    "cross-env": "10.1.0",
+    "dotenv": "17.2.3",
     "pkg-pr-new": "0.0.60",
+    "rimraf": "6.0.1",
     "tsup": "8.5.0",
-    "typescript": "5.9.2",
+    "typescript": "5.9.3",
     "vitest": "3.2.4",
     "vitest-fetch-mock": "0.4.5"
   },
-  "packageManager": "pnpm@10.17.1"
+  "packageManager": "pnpm@10.18.2"
 }