Add test case for pcntl_setpriority basic behaviour

Author: galvao

ext/pcntl/tests/pcntl_setpriority_basic.phpt

@@ -0,0 +1,23 @@
+--TEST--
+pcntl_setpriority() - Basic behaviour
+--CREDITS--
+Er Galvão Abbott [email protected]
+# TestFest 2017 PHPRS PHP UG 2017-10-31
+--SKIPIF--
+<?php
+if (!isset($_SERVER['SUDO_USER'])) {
+    die('skip - this functions needs to run with superuser');
+}
+
+if (!extension_loaded('pcntl')) {
+    die('skip - ext/pcntl not loaded');
+} else if (!function_exists('pcntl_setpriority')) {
+    die('skip - pcntl_setpriority doesn\'t exist');
+}
+?>
+--FILE--
+<?php
+var_dump(pcntl_setpriority(-5));
+?>
+--EXPECT--
+bool(true)