Complete base and alias inserts

tests/test_state.py

@@ -3,7 +3,10 @@ import unittest
 
 # local imports
 from schiz import State
-from schiz.error import StateExists
+from schiz.error import (
+        StateExists,
+        StateInvalid,
+        )
 
 
 class TestState(unittest.TestCase):
@@ -31,5 +34,35 @@ class TestState(unittest.TestCase):
             states.add('foo')
 
 
+    def test_alias(self):
+        states = State(2)
+        states.add('foo')
+        states.add('bar')
+        states.alias('baz', states.FOO | states.BAR)
+        self.assertEqual(states.BAZ, 3)
+
+
+    def test_alias_limit(self):
+        states = State(2)
+        states.add('foo')
+        states.add('bar')
+        states.alias('baz', states.FOO | states.BAR)
+
+
+    def test_alias_nopure(self):
+        states = State(3)
+        with self.assertRaises(ValueError):
+            states.alias('foo', 4)
+
+
+    def test_alias_cover(self):
+        states = State(3)
+        states.add('foo')
+        states.add('bar')
+        with self.assertRaises(StateInvalid):
+            states.alias('baz', 5)
+
+
+
 if __name__ == '__main__':
     unittest.main()