test: migrated graceful-shutdown.test.js from tap to node:test

Author: Tony133

test/graceful-shutdown.test.js

@@ -1,13 +1,10 @@
 'use strict'
 
-const t = require('tap')
-// Tests skip on win32 platforms due SIGINT signal is not supported across all windows platforms
-const test = (process.platform === 'win32') ? t.skip : t.test
+const { test } = require('node:test')
 const sinon = require('sinon')
 const start = require('../start')
 
 let _port = 3001
-
 function getPort () {
   return '' + _port++
 }
@@ -17,35 +14,36 @@ let fastify = null
 let signalCounter = null
 const sandbox = sinon.createSandbox()
 
-t.beforeEach(async () => {
+test.beforeEach(async () => {
   signalCounter = process.listenerCount('SIGINT')
 
   const argv = ['-p', getPort(), './examples/plugin.js']
   fastify = await start.start(argv)
   spy = sinon.spy(fastify, 'close')
 })
 
-t.afterEach(async () => {
+test.afterEach(async () => {
+  if (fastify) {
+    await fastify.close()
+  }
   sandbox.restore()
 })
 
-test('should add and remove SIGINT listener as expected ', async t => {
+test('should add and remove SIGINT listener as expected', async (t) => {
   t.plan(2)
 
-  t.equal(process.listenerCount('SIGINT'), signalCounter + 1)
+  t.assert.strictEqual(process.listenerCount('SIGINT'), signalCounter + 1)
 
   await fastify.close()
 
-  t.equal(process.listenerCount('SIGINT'), signalCounter)
-
-  t.end()
+  t.assert.strictEqual(process.listenerCount('SIGINT'), signalCounter)
 })
 
 test('should have called fastify.close() when receives a SIGINT signal', async t => {
   process.once('SIGINT', () => {
     sinon.assert.called(spy)
 
-    t.end()
+    t.assert.ok('SIGINT signal handler called')
 
     process.exit()
   })