Add test for internal functions calling userland functions

Author: beberlei

tests/xhprof_008.phpt

@@ -0,0 +1,24 @@
+--TEST--
+xhprof: internal functions calling userland functions
+--FILE--
+<?php
+
+include_once dirname(__FILE__).'/common.php';
+
+function double($x) {
+    return $x * 2;
+}
+
+tideways_xhprof_enable();
+
+$doubles = array_map('double', range(1, 10));
+
+$output = tideways_xhprof_disable();
+
+print_canonical($output);
+--EXPECTF--
+array_map==>double                      : ct=      10; wt=*;
+main()                                  : ct=       1; wt=*;
+main()==>array_map                      : ct=       1; wt=*;
+main()==>range                          : ct=       1; wt=*;
+main()==>tideways_xhprof_disable        : ct=       1; wt=*;