Also test timeout cases

test/client.test.js

@@ -1477,3 +1477,28 @@ tap.test('connection refused', function (t) {
     t.end()
   })
 })
+
+tap.test('connection timeout', function (t) {
+  const client = ldap.createClient({
+    url: 'ldap://example.org',
+    connectTimeout: 1,
+    timeout: 1
+  })
+
+  var done = false
+
+  setTimeout(function () {
+    if (!done) {
+      throw new Error('LDAPJS waited for the server for too long')
+    }
+  }, 2000)
+
+  client.bind('cn=root', 'secret', function (err, res) {
+    t.true(err)
+    t.type(err, Error)
+    t.equals(err.message, 'connection timeout')
+    done = true
+    t.false(res)
+    t.end()
+  })
+})