Make this test meaningful

We're not only checking that hash_update_file() succeeds, but rather
that it properly works.

Furthermore, we fix the SKIPIF section – we don't need mhash to run the
test, and we don't need to check for unsupported PHP versions.

We also shorten the test name to avoid cluttering the test reports with
unnecessary detail.

ext/hash/tests/hash_update_file.phpt

@@ -1,21 +1,24 @@
 --TEST--
-bool hash_update_file ( resource $hcontext , string $filename [, resource $scontext = NULL ] );
+hash_update_file() function - basic test
 --CREDITS--
 marcosptf - <[email protected]> - @phpsp - sao paulo - br
 --SKIPIF--
 <?php
-if (phpversion() < "5.3.0") {
-    die('SKIP php version so lower.');
-}
-require_once(dirname(__FILE__) . '/skip_mhash.inc'); ?>
+if (!extension_loaded('hash')) die('skip hash extension not available');
 ?>
 --FILE--
 <?php
+$filePath = __DIR__ . DIRECTORY_SEPARATOR . 'hash_update_stream.txt';
+file_put_contents($filePath, 'The quick brown fox jumped over the lazy dog.');
+
 $ctx = hash_init('md5');
-$filePath = __DIR__ . DIRECTORY_SEPARATOR . 'sha1.phpt';
-fopen($filePath, "r");
 var_dump(hash_update_file($ctx, $filePath));
-hash_final($ctx);
+echo hash_final($ctx);
 ?>
 --EXPECT--
 bool(true)
+5c6ffbdd40d9556b73a21e63c3e0e904
+--CLEAN--
+<?php
+unlink(__DIR__ . DIRECTORY_SEPARATOR . 'hash_update_stream.txt');
+?>