Fix ensureDN (#918)

lib/client/client.js

@@ -80,7 +80,7 @@ function validateControls (controls) {
 
 function ensureDN (input) {
   if (DN.isDn(input)) {
-    return DN
+    return input
   } else if (typeof (input) === 'string') {
     return DN.fromString(input)
   } else {

test/client.test.js

@@ -10,6 +10,7 @@ const Attribute = require('@ldapjs/attribute')
 const Change = require('@ldapjs/change')
 const messages = require('@ldapjs/messages')
 const controls = require('@ldapjs/controls')
+const dn = require('@ldapjs/dn')
 const ldap = require('../lib')
 
 const {
@@ -761,6 +762,36 @@ tap.test('search basic', function (t) {
   })
 })
 
+tap.test('search basic with DN', function (t) {
+  const { SearchResultEntry, SearchResultDone } = messages
+
+  t.context.client.search(dn.DN.fromString('cn=test, ' + SUFFIX, '(objectclass=*)'), function (err, res) {
+    t.error(err)
+    t.ok(res)
+    let gotEntry = 0
+    res.on('searchEntry', function (entry) {
+      t.ok(entry)
+      t.ok(entry instanceof SearchResultEntry)
+      t.equal(entry.dn.toString(), 'cn=test,' + SUFFIX)
+      t.ok(entry.attributes)
+      t.ok(entry.attributes.length)
+      t.equal(entry.attributes[0].type, 'cn')
+      t.equal(entry.attributes[1].type, 'SN')
+      gotEntry++
+    })
+    res.on('error', function (err) {
+      t.fail(err)
+    })
+    res.on('end', function (res) {
+      t.ok(res)
+      t.ok(res instanceof SearchResultDone)
+      t.equal(res.status, 0)
+      t.equal(gotEntry, 2)
+      t.end()
+    })
+  })
+})
+
 tap.test('GH-602 search basic with delayed event listener binding', function (t) {
   t.context.client.search('cn=test, ' + SUFFIX, '(objectclass=*)', function (err, res) {
     t.error(err)