Finish enhancement by issue #3

- Fixed: Support negative int
- Fixed: seek_back not move pos
- Added: Auto encoding

tests/__init__.py

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+from .test_all import *

tests/test_all.py

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+from __future__ import unicode_literals
+
+import unittest
+import collections
+
+from torrent_parser import TorrentFileParser, parse_torrent_file
+
+
+class Test(unittest.TestCase):
+    REAL_FILE = 'tests/testfiles/real.torrent'
+    NEG_FILE = 'tests/testfiles/neg.torrent'
+
+    def test_parse_torrent_file_use_shortcut(self):
+        parse_torrent_file(self.REAL_FILE)
+
+    def test_parse_torrent_file_use_class(self):
+        with open(self.REAL_FILE, 'rb') as fp:
+            TorrentFileParser(fp).parse()
+
+    def test_encoding_auto(self):
+        with open(self.REAL_FILE, 'rb') as fp:
+            TorrentFileParser(fp, encoding='auto').parse()
+
+    def test_parse_torrent_file_to_ordered_dict(self):
+        data = parse_torrent_file(self.REAL_FILE, True)
+        self.assertIsInstance(data, collections.OrderedDict)
+
+        with open(self.REAL_FILE, 'rb') as fp:
+            data = TorrentFileParser(fp, True).parse()
+        self.assertIsInstance(data, collections.OrderedDict)
+
+    def test_parse_correctness(self):
+        data = parse_torrent_file(self.REAL_FILE)
+        self.assertIn(['udp://tracker.publicbt.com:80/announce'],
+                      data['announce-list'])
+        self.assertEqual(data['creation date'], 1409254242)
+
+    def test_parse_two_times(self):
+        with open(self.REAL_FILE, 'rb') as fp:
+            parser = TorrentFileParser(fp)
+            data = parser.parse()
+            self.assertIn(['udp://tracker.publicbt.com:80/announce'],
+                          data['announce-list'])
+            self.assertEqual(data['creation date'], 1409254242)
+            data = parser.parse()
+            self.assertIn(['udp://tracker.publicbt.com:80/announce'],
+                          data['announce-list'])
+            self.assertEqual(data['creation date'], 1409254242)
+
+    def test_int_is_negative(self):
+        data = parse_torrent_file(self.NEG_FILE)
+        self.assertEqual(data['neg'], -1)
+
+
+if __name__ == '__main__':
+    unittest.main()

tests/testfiles/neg.torrent

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+d3:negi-1ee