Create test_version.py

#7 Added Test for valid __date__ and __version__

test/test_version.py

@@ -0,0 +1,57 @@
+# -*- coding: utf-8 -*-
+"""Testing version.py
+
+Copyright (C) 2020  Martin Röbke
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.
+    If not, see https://www.gnu.org/licenses/gpl-3.0.html
+
+"""
+from datetime import date
+import re
+import unittest
+from tdvisu.version import __date__, __version__ as version
+
+
+class TestVersion(unittest.TestCase):
+    """Testing fields in version."""
+
+    def test_semantic_version(self):
+        """Test the version-format with https://semver.org/spec/v2.0.0.html."""
+        self.assertIsInstance(version, str)
+        regex = (r"^(?P<major>0|[1-9]\d*)\."
+                 r"(?P<minor>0|[1-9]\d*)\."
+                 r"(?P<patch>0|[1-9]\d*)"
+                 r"(?:-(?P<prerelease>(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)"
+                 r"(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))"
+                 "?(?:\+(?P<buildmetadata>[0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$")
+        result = re.fullmatch(regex, version)
+        msg = f"The version {version} does not adhere to semantic versioning!"
+        self.assertIsNotNone(result, msg)
+
+    def test_date(self):
+        """The date should be 'YYYY-MM-DD' isoformat to be fully portable."""
+        self.assertIsInstance(__date__, str)
+        # Is it an existing date?
+        try:
+            date.fromisoformat(__date__)
+        except ValueError as err:
+            msg = f"""The date {__date__} is not in the format YYYY-MM-DD!
+                    ValueError: {err}
+                    Today would be: '{date.today().isoformat()}'"""
+            self.fail(msg)
+
+
+if __name__ == '__main__':
+    unittest.main()