add hw2

node_modules/thread-stream/test/create-and-exit.js

@@ -0,0 +1,16 @@
+'use strict'
+
+const { join } = require('path')
+const ThreadStream = require('..')
+
+const stream = new ThreadStream({
+  filename: join(__dirname, 'to-file.js'),
+  workerData: { dest: process.argv[2] },
+  sync: true
+})
+
+stream.write('hello')
+stream.write(' ')
+stream.write('world\n')
+stream.flushSync()
+stream.unref()