add hw2

node_modules/pino/test/transport/targets.test.js

@@ -0,0 +1,28 @@
+'use strict'
+
+const { test } = require('tap')
+const proxyquire = require('proxyquire')
+const Writable = require('stream').Writable
+
+test('file-target mocked', async function ({ equal, same, plan, pass }) {
+  plan(1)
+  let ret
+  const fileTarget = proxyquire('../../file', {
+    './pino': {
+      destination (opts) {
+        same(opts, { dest: 1, sync: false })
+
+        ret = new Writable()
+        ret.fd = opts.dest
+
+        process.nextTick(() => {
+          ret.emit('ready')
+        })
+
+        return ret
+      }
+    }
+  })
+
+  await fileTarget()
+})