add unit test for vercel#775

test/test-775/a.js

@@ -0,0 +1,4 @@
+console.log('Starting a');
+const { Worker } = require('worker_threads');
+new Worker('./b.js');
+console.log('Finishing a');

test/test-775/b.js

@@ -0,0 +1,3 @@
+// b.js
+console.log('Starting b');
+console.log('Finishing b');

test/test-775/main.js

@@ -0,0 +1,56 @@
+#!/usr/bin/env node
+
+'use strict';
+
+const path = require('path');
+const assert = require('assert');
+const utils = require('../utils.js');
+
+assert(!module.parent);
+assert(__dirname === process.cwd());
+
+/* eslint-disable no-unused-vars */
+const input = 'package.json';
+const target = 'host';
+const ext = process.platform === 'win32' ? '.exe' : '';
+const output = 'output' + ext;
+
+const inspect = ['ignore', 'ignore', 'pipe'];
+
+const logPkg1 = utils.pkg.sync(
+  ['--target', target, '--debug', '--output', output, input],
+  { expect: 0 }
+);
+
+const log1 = utils.spawn.sync(path.join(__dirname, output), [], {
+  cwd: __dirname,
+  expect: 0,
+});
+
+assert.strictEqual(
+  log1,
+  `Starting a
+Finishing a
+Starting b
+Finishing b
+`
+);
+
+const logPkg2 = utils.pkg.sync(
+  ['--target', target, '--debug', '--output', output, 'a.js'],
+  { expect: 0 }
+);
+
+const log2 = utils.spawn.sync(path.join(__dirname, output), [], {
+  cwd: __dirname,
+  expect: 0,
+});
+assert.strictEqual(
+  log2,
+  `Starting a
+Finishing a
+Starting b
+Finishing b
+`
+);
+utils.vacuum.sync(output);

test/test-775/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "a",
+  "version": "0.1.0",
+  "description": "proof",
+  "bin": "a.js",
+  "license": "UNLICENSED",
+  "devDependencies": {
+    "pkg": "^4.4.0"
+  },
+  "pkg": {
+    "scripts": [
+      "a.js",
+      "b.js"
+    ]
+  }
+}