added test for cell state and fixed wront initial state

src/cellular_automaton/ca_cell_state.py

@@ -5,7 +5,7 @@ class CellState:
     """
     def __init__(self, initial_state, state_save_slot_count=2):
         self._state_save_slot_count = state_save_slot_count
-        self._state_slots = [[initial_state]] * state_save_slot_count
+        self._state_slots = [initial_state] * state_save_slot_count
 
     def set_status_of_iteration(self, new_status, iteration):
         """ Will set the new status for the iteration modulo number of saved states.

test/test_cell_state.py

@@ -0,0 +1,27 @@
+import sys
+sys.path.append('../src')
+
+import cellular_automaton.ca_cell_state as cs
+import unittest
+
+
+class TestCellState(unittest.TestCase):
+
+    def test_get_state_of_iteration(self):
+        cell_state = cs.CellState(0, state_save_slot_count=3)
+        cell_state.set_status_of_iteration(1, 0)
+        self.assertEqual(cell_state.get_status_of_iteration(3), 1)
+
+    def test_set_state_applies_overflow(self):
+        cell_state = cs.CellState(0, state_save_slot_count=4)
+        cell_state.set_status_of_iteration(1, 4)
+        self.assertEqual(cell_state.get_status_of_iteration(0), 1)
+
+    def test_set_state_only_applies_to_iteration_slot(self):
+        cell_state = cs.CellState(0, state_save_slot_count=2)
+        cell_state.set_status_of_iteration(1, 0)
+        self.assertEqual(cell_state.get_status_of_iteration(1), 0)
+
+
+if __name__ == '__main__':
+    unittest.main()

test/test_state.py

@@ -1,20 +0,0 @@
-import sys
-sys.path.append('../src')
-
-import cellular_automaton.ca_cell_state as cs
-import unittest
-
-
-class TestState(unittest.TestCase):
-
-    def test_state_slots(self):
-        cell_state = cs.CellState([0])
-        cell_state.set_status_of_iteration([1], 0)
-        cell_state.set_status_of_iteration([2], 1)
-        cell_state.set_status_of_iteration([3], 2)
-
-        self.assertEqual(cell_state.get_status_of_iteration(0), [3])
-
-
-if __name__ == '__main__':
-    unittest.main()