Coverage for a 'silent server protocol change' from the past for which both mysqlnd...

diff --git a/ext/mysqli/tests/mysqli_change_user.phpt b/ext/mysqli/tests/mysqli_change_user.phpt
index a9b8ae7ade6d162e697cd06827194e201ae96a51..bfea423c9e42e1b4af831abec83e79855e47fbd1 100644 (file)
--- a/ext/mysqli/tests/mysqli_change_user.phpt
+++ b/ext/mysqli/tests/mysqli_change_user.phpt
@@ -83,8 +83,28 @@ require_once('skipifconnectfailure.inc');
 
        mysqli_close($link);
 
+       if (!$link = my_mysqli_connect($host, $user, $passwd, $db, $port, $socket)) {
+               printf("[022] Cannot connect to the server using host=%s, user=%s, passwd=***, dbname=%s, port=%s, socket=%s\n",
+                       $host, $user, $db, $port, $socket);
+       }
+
+       /* silent protocol change if no db which requires workaround in mysqlnd/libmysql
+    (empty db = no db send with COM_CHANGE_USER) */
+       if (true !== ($tmp = mysqli_change_user($link, $user, $passwd, "")))
+               printf("[023] Expecting true, got %s/%s\n", gettype($tmp), $tmp);
+
+       if (!$res = mysqli_query($link, 'SELECT database() AS dbname, user() AS user'))
+               printf("[024] [%d] %s\n", mysqli_errno($link), mysqli_error($link));
+       $tmp = mysqli_fetch_assoc($res);
+       mysqli_free_result($res);
+
+       if ($tmp['dbname'] != "")
+               printf("[025] Expecting database '', got database() '%s'\n", $tmp['dbname']);
+
+       mysqli_close($link);
+
        if (NULL !== ($tmp = @mysqli_change_user($link, $user, $passwd, $db)))
-               printf("[022] Expecting NULL, got %s/%s\n", gettype($tmp), $tmp);
+               printf("[026] Expecting NULL, got %s/%s\n", gettype($tmp), $tmp);
 
        print "done!";
 ?>