feat: added is_in_final_state method

tests/test_mealy.py

@@ -210,6 +210,22 @@ class TestMachine(unittest.TestCase):
         with self.assertRaises(ValueError):
             m.reset()
 
+    # IS_IN_FINAL_STATE
+
+    def test_is_in_final_state(self):
+        m = Machine()
+        m.add_state("A", True, False)
+        m.add_state("B", False, True)
+        m.add_transition("X", "A", "B", lambda context: print("A -> B"))
+        m.process_input("X")
+        self.assertTrue(m.is_in_final_state())
+        m.reset()
+        self.assertFalse(m.is_in_final_state())
+
+    def test_is_in_final_state_not_started(self):
+        m = Machine()
+        self.assertFalse(m.is_in_final_state())
+
     # STATE
 
     def test_state_str(self):