test: add test cases

Author: kenjis

tests/system/Helpers/URLHelper/SiteUrlTest.php

@@ -139,6 +139,33 @@ public function configProvider()
                 'http://example.com/abc',
                 'http://example.com/abc',
             ],
+            [
+                'http://example.com/',
+                '',
+                null,
+                false,
+                '/abc',
+                'http://example.com/abc',
+                'http://example.com/abc',
+            ],
+            [
+                'http://example.com/',
+                '',
+                null,
+                false,
+                '/abc/',
+                'http://example.com/abc/',
+                'http://example.com/abc/',
+            ],
+            [
+                'http://example.com/',
+                '',
+                null,
+                false,
+                '/abc/def',
+                'http://example.com/abc/def',
+                'http://example.com/abc/def',
+            ],
             'URL decode' => [
                 'http://example.com/',
                 '',