'''
unit_tester.py - The module contains the MailScriptTester class.

Copyright (c) 2012 Intra2net AG
Author: Plamen Dimitrov

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.
'''

import unittest
import datetime
import date_interpreter

class MailScriptTester(unittest.TestCase):

    def setUp(self):
        self.date_interp = date_interpreter.DateInterpreter()
        self.true_date = datetime.datetime(2007, 12, 11, 18, 24, 35)

    def test_received_header1(self):
        """Tests the date extraction method."""
        date = [[0, b"Tue, 11 Dec 2007 18:24:35 +0100"]]
        extracted_date = self.date_interp.extract_received_date(date)
        self.assertEqual(extracted_date, self.true_date, "Failed date format 1")

    def test_received_header2(self):
        """Tests the date extraction method."""
        date = [[0, b"11 Dec 2007 \r\n18:24:35 +0100"]]
        extracted_date = self.date_interp.extract_received_date(date)
        self.assertEqual(extracted_date, self.true_date, "Failed date format 2")
        return

    def test_received_header3(self):
        """Tests the date extraction method."""  
        date = [[0, b"11 Dec 2007 18:24:35 +0100"]]
        extracted_date = self.date_interp.extract_received_date(date)
        self.assertEqual(extracted_date, self.true_date, "Failed date format 3")

    def test_received_header4(self):
        """Tests the date extraction method."""
        date = [[0, b"11 Dec 2007 18:24:35"]]
        extracted_date = self.date_interp.extract_received_date(date)
        #should not be equal because of time zone assumption
        self.assertNotEqual(extracted_date, self.true_date, "Failed date format 4")

    def test_received_header5(self):
        """Tests the received date extraction method."""
        date = [[0, b"11 Dec 2007 18:24:35 GMT"]]
        extracted_date = self.date_interp.extract_received_date(date)
        #should not be equal because of time zone assumption
        self.assertNotEqual(extracted_date, self.true_date, "Failed date format 5")

    def test_compare_dates(self):
        """Tests the date comparison method."""
        self.true_date2 = datetime.datetime(2007, 12, 11, 18, 34, 35)
        #is difference of 10 mins significant if tolerance is 9 mins
        self.assertTrue(bool(self.date_interp.compare_dates(self.true_date, self.true_date2, 9*60)), "Failed at comparison test")
        #is difference of 10 mins significant if tolerance is 11 mins
        self.assertFalse(bool(self.date_interp.compare_dates(self.true_date, self.true_date2, 11*60)), "Failed at comparison test")

if __name__ == '__main__':
    unittest.main()