Add simple parsing test

ext/domxml/tests/skipif.inc

@@ -0,0 +1,3 @@
+<?php
+	if (!extension_loaded('domxml')) die('skip domxml extension not available');
+?>

ext/domxml/tests/xmldoc.phpt

@@ -0,0 +1,35 @@
+--TEST--
+xmldoc()
+--SKIPIF--
+<?php require_once('skipif.inc'); ?>
+--FILE--
+<?php
+require_once("domxml_test.inc");
+
+$dom = xmldoc($xmlstr);
+if(!$dom) {
+  die('Error while parsing the document');
+}
+var_dump($dom);
+?>
+--EXPECTF--
+object(domdocument)(9) {
+  ["name"]=>
+  string(9) "#document"
+  ["url"]=>
+  string(0) ""
+  ["version"]=>
+  string(3) "1.0"
+  ["standalone"]=>
+  int(1)
+  ["type"]=>
+  int(9)
+  ["compression"]=>
+  int(-1)
+  ["charset"]=>
+  int(1)
+  [0]=>
+  int(5)
+  [1]=>
+  int(%d)
+}