#!/usr/bin/env python
from state import Radio
import sys

if sys.version_info < (2, 7):
    import unittest2 as unittest
else:
    import unittest

class RadioTest(unittest.TestCase):
    """
    Attention: Test case results depend on test case execution. The test cases
    in this integration test class should be executed in an explicit order:
    http://stackoverflow.com/questions/5387299/python-unittest-testcase-execution-order
    """

    @classmethod
    def setUpClass(self):
        self.radio = Radio()

    def test_initial_state(self):
        state = self.radio.state.name
        expected_state_name = 'AM'
        self.assertEqual(state, expected_state_name)

    def test_initial_am_station(self):
        station = self.radio.state.stations[self.radio.state.pos]
        expected_station = '1250'
        self.assertEqual(station, expected_station)

    def test_2nd_am_station_after_scan(self):
        self.radio.scan()
        station = self.radio.state.stations[self.radio.state.pos]
        expected_station = '1380'
        self.assertEqual(station, expected_station)

    def test_3rd_am_station_after_scan(self):
        self.radio.scan()
        station = self.radio.state.stations[self.radio.state.pos]
        expected_station = '1510'
        self.assertEqual(station, expected_station)

    def test_am_station_overflow_after_scan(self):
        self.radio.scan()
        station = self.radio.state.stations[self.radio.state.pos]
        expected_station = '1250'
        self.assertEqual(station, expected_station)

    def test_shall_toggle_from_am_to_fm(self):
        self.radio.toggle_amfm()
        state = self.radio.state.name
        expected_state_name = 'FM'
        self.assertEqual(state, expected_state_name)

    def test_shall_toggle_from_fm_to_am(self):
        self.radio.toggle_amfm()
        state = self.radio.state.name
        expected_state_name = 'AM'
        self.assertEqual(state, expected_state_name)

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