refactor: follow PEP standards

Follow Python Enhancement Proposals and add PyLint to enforce them.

gitea_auto_update/lib/test_version.py

@@ -0,0 +1,52 @@
+'''
+Gitea Auto Updater
+
+Copyright 2019, 2020 The Gitea-Auto-Update Authors
+All rights reserved.
+
+License: GNU General Public License
+'''
+import unittest
+import gitea_auto_update.lib.version
+
+VERSION = gitea_auto_update.lib.version
+
+
+class TestVersion(unittest.TestCase):
+    """Test the version class"""
+
+    def test_simple_version(self):
+        """1.9.1 should be newer than 1.9.0"""
+        self.assertTrue(VERSION.check_version('1.9.1', '1.9.0'))
+
+    def test_two_int_version(self):
+        """1.10.0 should be newer than 1.9.0"""
+        self.assertTrue(VERSION.check_version('1.10.0', '1.9.0'))
+
+    def test_false_version(self):
+        """1.8.0 should be older than 1.9.0"""
+        self.assertFalse(VERSION.check_version('1.8.0', '1.9.0'))
+
+    def test_same_version(self):
+        """1.9.7 should be the same as 1.9.7"""
+        self.assertFalse(VERSION.check_version('1.9.7', '1.9.7'))
+
+    def test_int(self):
+        """9 should be newer than 8"""
+        self.assertTrue(VERSION.check_version('9', '8'))
+
+    def test_suffix(self):
+        """1.9.0+dev-264-g8de76b6e6 should be newer than 1.8.0"""
+        self.assertTrue(VERSION.check_version('1.9.0+dev-264-g8de76b6e6', '1.8.0'))
+
+    def test_parse_file_version(self):
+        """It should get the version from a string"""
+        string = 'Gitea version 1.8.1 built with go1.12.2 : bindata, sqlite, sqlite_unlock_notify'
+        self.assertEqual(
+            VERSION.parse_file_version(string),
+            '1.8.1'
+        )
+
+
+if __name__ == '__main__':
+    unittest.main()