Add tests for parsing timestamps and the UTC flag

tests/test_datetime.py

@@ -0,0 +1,51 @@
+# coding: utf-8
+
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+from datetime import datetime
+import unittest
+
+from ctx_parser import date_time
+
+
+class TestTheDateTimeModule(unittest.TestCase):
+
+    def test_can_parse_timestamps(self):
+        # setup test data
+        test_timestamp = 1399846525
+
+        test_element = '"{}"'.format(test_timestamp)
+
+        # test parsing of timestamp
+        parsed_elements = date_time.TIMESTAMP.parseString(test_element)
+
+        # check result
+        self.assertEqual(
+            parsed_elements[0],
+            datetime.fromtimestamp(test_timestamp)
+        )
+
+    def test_can_parse_set_utc_flags(self):
+        # setup test data
+        test_bit = 1
+        test_flag = 'int inUtc="{}"'.format(test_bit)
+
+        # test parsing of flag
+        parsed_elements = date_time.UTC_FLAG.parseString(test_flag)
+
+        # check result
+        self.assertEqual(parsed_elements.inUtc, True)
+
+    def test_can_parse_unset_utc_flags(self):
+        # setup test data
+        test_bit = 0
+        test_flag = 'int inUtc="{}"'.format(test_bit)
+
+        # test parsing of flag
+        parsed_elements = date_time.UTC_FLAG.parseString(test_flag)
+
+        # check result
+        self.assertEqual(parsed_elements.inUtc, False)