Add socket_atmark unit test

Author: devnexen

ext/sockets/tests/socket_atmark.phpt

@@ -0,0 +1,35 @@
+--TEST--
+ext/sockets - socket_atmark
+--EXTENSIONS--
+sockets
+--SKIPIF--
+<?php
+    
+    if (getenv("SKIP_ONLINE_TESTS")) {
+        die("skip test requiring internet connection");
+    }
+?>
+--FILE--
+<?php
+    $s_c = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create failed");
+    $s_bind  = socket_bind($s_c, '0.0.0.0') or die("socket_bind failed");
+    $s_conn  = socket_connect($s_c, 'www.php.net', 80) or die("socket_connect failed");
+    $string = "no chance of socket_atmark returning true";
+    $len = strlen($string);
+    $s_w = socket_send($s_c, $string, $len, 0);
+    if ($s_w != $len)
+        die("socket_send failed");
+    if (socket_atmark($s_c) === FALSE) {
+        if (socket_recv($s_c, $buf, $len, 0) != $len)
+            die("socket_recv failed");
+        echo "not OOB";
+    } else {
+        $buf = "";
+        if (socket_recv($s_c, $buf, 1, MSG_OOB) === FALSE)
+            die("socket_recv failed");
+        echo "OOB";
+    }
+    socket_close($s_c);
+?>
+--EXPECT--
+not OOB