Only lower-case user name if first login attempt failed (#1486393) + fix test

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Only lower-case user name if first login attempt failed (#1486393)
 - Make alias setting in squirrelmail_usercopy plugin configurable (patch by pommi, #1487007)
 - Prevent from saving a non-existing skin path in user prefs (#1486936)
 - Improve handling of single-part messages with bogus BODYSTRUCTURE (#1486898)

program/include/rcmail.php

@@ -611,10 +611,6 @@ class rcmail
       if ($virtuser = rcube_user::email2user($username))
         $username = $virtuser;
 
-    // lowercase username if it's an e-mail address (#1484473)
-    if (strpos($username, '@'))
-      $username = mb_strtolower($username);
-
     // user already registered -> overwrite username
     if ($user = rcube_user::query($username, $host))
       $username = $user->data['username'];
@@ -622,8 +618,16 @@ class rcmail
     if (!$this->imap)
       $this->imap_init();
 
+    // try IMAP login
+    if (!($imap_login = $this->imap->connect($host, $username, $pass, $imap_port, $imap_ssl))) {
+      // lowercase username if it's an e-mail address (#1484473)
+      $username_lc = mb_strtolower($username);
+      if ($username_lc != $username && ($imap_login = $this->imap->connect($host, $username_lc, $pass, $imap_port, $imap_ssl)))
+        $username = $username_lc;
+    }
+
     // exit if IMAP login failed
-    if (!($imap_login  = $this->imap->connect($host, $username, $pass, $imap_port, $imap_ssl)))
+    if (!$imap_login)
       return false;
 
     $this->set_imap_prop();

tests/modcss.php

@@ -18,7 +18,7 @@ class rcube_test_modcss extends UnitTestCase
     $css = file_get_contents(TESTS_DIR . 'src/valid.css');
     $mod = rcmail_mod_css_styles($css, 'rcmbody');
 
-    $this->assertPattern('/#rcmbody div.rcmBody\s+\{/', $mod, "Replace body style definition");
+    $this->assertPattern('/#rcmbody\s+\{/', $mod, "Replace body style definition");
     $this->assertPattern('/#rcmbody h1\s\{/', $mod, "Prefix tag styles (single)");
     $this->assertPattern('/#rcmbody h1, #rcmbody h2, #rcmbody h3, #rcmbody textarea\s+\{/', $mod, "Prefix tag styles (multiple)");
     $this->assertPattern('/#rcmbody \.noscript\s+\{/', $mod, "Prefix class styles");