Tests for state patt. can be run in random order

gyermolenko · gyermolenko · commit 6fa00c5bc86c · 2020-01-08T16:25:46.000+02:00
diff --git a/tests/behavioral/test_state.py b/tests/behavioral/test_state.py
@@ -1,54 +1,24 @@
-import unittest
+import pytest
+
 from patterns.behavioral.state import Radio
 
 
-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)
+@pytest.fixture
+def radio():
+    return Radio()
+
+def test_initial_state(radio):
+    assert radio.state.name == 'AM'
+
+def test_initial_am_station(radio):
+    initial_pos = radio.state.pos
+    assert radio.state.stations[initial_pos] == '1250'
+
+def test_toggle_amfm(radio):
+    assert radio.state.name == 'AM'
+
+    radio.toggle_amfm()
+    assert radio.state.name == 'FM'
+
+    radio.toggle_amfm()
+    assert radio.state.name == 'AM'
