test: add number coersion related tests

lib/server.js

@@ -332,7 +332,7 @@ function normalizeListenArgs (args) {
 
 function normalizePort (firstArg) {
   const port = Number(firstArg)
-  return port >= 0 && !Number.isNaN(port) ? port : 0
+  return port >= 0 && !Number.isNaN(port) && Number.isInteger(port) ? port : 0
 }
 
 function logServerAddress (server) {

test/reply-code.test.js

@@ -0,0 +1,59 @@
+'use strict'
+
+const t = require('tap')
+const test = t.test
+const Fastify = require('..')
+
+test('code should handle null/undefined/float', t => {
+  t.plan(8)
+
+  const fastify = Fastify()
+
+  fastify.get('/null', function (request, reply) {
+    reply.status(null).send()
+  })
+
+  fastify.get('/undefined', function (request, reply) {
+    reply.status(undefined).send()
+  })
+
+  fastify.get('/404.5', function (request, reply) {
+    reply.status(404.5).send()
+  })
+
+  fastify.inject({
+    method: 'GET',
+    url: '/null'
+  }, (error, res) => {
+    t.error(error)
+    t.equal(res.statusCode, 500)
+    t.same(res.json(), {
+      statusCode: 500,
+      code: 'FST_ERR_BAD_STATUS_CODE',
+      error: 'Internal Server Error',
+      message: 'Called reply with an invalid status code: null'
+    })
+  })
+
+  fastify.inject({
+    method: 'GET',
+    url: '/undefined'
+  }, (error, res) => {
+    t.error(error)
+    t.equal(res.statusCode, 500)
+    t.same(res.json(), {
+      statusCode: 500,
+      code: 'FST_ERR_BAD_STATUS_CODE',
+      error: 'Internal Server Error',
+      message: 'Called reply with an invalid status code: undefined'
+    })
+  })
+
+  fastify.inject({
+    method: 'GET',
+    url: '/404.5'
+  }, (error, res) => {
+    t.error(error)
+    t.equal(res.statusCode, 404)
+  })
+})

test/server.test.js

@@ -0,0 +1,25 @@
+'use strict'
+
+const t = require('tap')
+const test = t.test
+const Fastify = require('..')
+
+test('listen should accept null port', t => {
+  t.plan(1)
+
+  const fastify = Fastify()
+  t.teardown(fastify.close.bind(fastify))
+  fastify.listen({ port: null }, (err) => {
+    t.error(err)
+  })
+})
+
+test('listen should accept undefined port', t => {
+  t.plan(1)
+
+  const fastify = Fastify()
+  t.teardown(fastify.close.bind(fastify))
+  fastify.listen({ port: undefined }, (err, address) => {
+    t.error(err)
+  })
+})