add tests

Author: deminy

tests/001_is_loaded.phpt

@@ -0,0 +1,10 @@
+--TEST--
+Check if bsdiff is loaded
+--EXTENSIONS--
+bsdiff
+--FILE--
+<?php
+echo 'The extension "bsdiff" is available';
+?>
+--EXPECT--
+The extension "bsdiff" is available

tests/002_basic.phpt

@@ -0,0 +1,25 @@
+--TEST--
+Basic test on bsdiff functions
+--EXTENSIONS--
+bsdiff
+--FILE--
+<?php
+$old_file     = __DIR__ . '/old.out';
+$new_file     = __DIR__ . '/new.out';
+$diff_file    = __DIR__ . '/diff.out';
+$patched_file = __DIR__ . '/patched.out';
+
+file_put_contents($old_file, str_repeat("Hello World", 1997));
+file_put_contents($new_file, str_repeat("Hello PHP", 1999));
+
+bsdiff_diff($old_file, $new_file, $diff_file);
+bsdiff_patch($old_file, $patched_file, $diff_file);
+
+var_dump(md5_file($diff_file));
+var_dump(md5_file($new_file));
+var_dump(md5_file($patched_file));
+?>
+--EXPECT--
+string(32) "041bfaaaf13b8cbde04b5ae614b096db"
+string(32) "43a76cb50268ee3614012af8fac38ba0"
+string(32) "43a76cb50268ee3614012af8fac38ba0"