Solve bug leading zero on date format

lib/rfc3164.js

@@ -36,14 +36,16 @@ function buildMessage (data, headerBytes) {
 
 module.exports = function ($options) {
   options = $options
-  const zeroReg = /0/
 
   return through2.obj(function transport (data, enc, cb) {
     const severity = utils.levelToSeverity(data.level)
     const pri = (8 * options.facility) + severity
-    const tstamp = moment(data.time).tz(options.tz).format('MMM DD HH:mm:ss').replace(zeroReg, ' ')
+    let timestamp = moment(data.time).tz(options.tz).format('MMM DD HH:mm:ss')
+    if (timestamp[4] === '0') {
+      timestamp = timestamp.substr(0, 4) + ' ' + timestamp.substr(5)
+    }
     const hostname = data.hostname.split('.')[ 0 ]
-    const header = `<${pri}>${tstamp} ${hostname} ${options.appname}[${data.pid}]: `
+    const header = `<${pri}>${timestamp} ${hostname} ${options.appname}[${data.pid}]: `
     const message = buildMessage(data, header.length)
     let output = (options.cee && !options.messageOnly) ? `${header}@cee: ${message}` : `${header}${message}`
 

test/3164.test.js

@@ -82,6 +82,34 @@ test('sets facility', (t) => {
   psyslog.stdin.write(messages.helloWorld + '\n')
 })
 
+test('format timestamp with leading zero in days', (t) => {
+  t.plan(1)
+  const expected = '<134>Feb  3 02:20:00 MacBook-Pro-3 none[94473]: hello world'
+  const psyslog = spawn('node', [psyslogPath, '-c', configPath('3164', 'date.json')])
+
+  psyslog.stdout.on('data', (data) => {
+    const msg = data.toString()
+    t.is(msg, expected)
+    psyslog.kill()
+  })
+
+  psyslog.stdin.write(messages.leadingDay + '\n')
+})
+
+test('format timestamp with trailing zero in days', (t) => {
+  t.plan(1)
+  const expected = '<134>Feb 10 02:20:00 MacBook-Pro-3 none[94473]: hello world'
+  const psyslog = spawn('node', [psyslogPath, '-c', configPath('3164', 'date.json')])
+
+  psyslog.stdout.on('data', (data) => {
+    const msg = data.toString()
+    t.is(msg, expected)
+    psyslog.kill()
+  })
+
+  psyslog.stdin.write(messages.trailingDay + '\n')
+})
+
 test('sets timezone', (t) => {
   t.plan(1)
   const expected = '<134>Apr  1 12:44:58 MacBook-Pro-3 none[94473]: hello world'

test/fixtures/configs/3164/date.json

@@ -0,0 +1,6 @@
+{
+    "modern": false,
+    "tz": "Europe/Zurich",
+    "messageOnly": true
+  }
+