Merge branch '3.0'

tests/Functional/Net/SFTPWrongServerTest.php

@@ -0,0 +1,18 @@
+<?php
+
+use phpseclib\Net\SFTP;
+use phpseclib\Exception\UnableToConnectException;
+use PHPUnit\Framework\TestCase;
+
+class SFTPWrongServerTest extends TestCase
+{
+    public function testLoginToInvalidServer()
+    {
+        try {
+            (new SFTP('dummy-server'))->login('username', 'password');
+            static::fail('The connection to the non-existent server must not succeed.');
+        } catch (UnableToConnectException $e) {
+            static::assertSame('Cannot connect to dummy-server:22. Error 0. php_network_getaddresses: getaddrinfo failed: Name or service not known', $e->getMessage());
+        }
+    }
+}