cooklee · cooklee · Mar 28, 2018 · Mar 28, 2018 · Mar 28, 2018
diff --git a/.idea/modules.xml b/.idea/modules.xml
diff --git a/.idea/playground.iml b/.idea/playground.iml
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
diff --git a/.pytest_cache/v/cache/lastfailed b/.pytest_cache/v/cache/lastfailed
@@ -0,0 +1,3 @@
+{
+  "test/test_mat_function.py::FibonacciTests::test_zero": true
+}
diff --git a/.pytest_cache/v/cache/nodeids b/.pytest_cache/v/cache/nodeids
@@ -0,0 +1,3 @@
+[
+  "test/test_mat_function.py::FibonacciTests::test_zero"
+]
diff --git a/test/__init__.py → Tests/__init__.py b/test/__init__.py → Tests/__init__.py
diff --git a/test/test_binary_tree.py → Tests/test_binary_tree.py b/test/test_binary_tree.py → Tests/test_binary_tree.py
diff --git a/test/test_iter_fibb.py → Tests/test_iter_fibb.py b/test/test_iter_fibb.py → Tests/test_iter_fibb.py
diff --git a/test/test_mat_function.py → Tests/test_mat_function.py b/test/test_mat_function.py → Tests/test_mat_function.py
@@ -11,9 +11,9 @@ class MatFunctionsTests(TestCase):
 
 class FibonacciTests(TestCase):
 
-    pass
-
-
-
+    def test_zero(self):
+        input = 0
+        expected_result = 0
+        self.assertEqual(Fibonacci.fibonacci(0), 0 )
 
 
diff --git a/Trees/BinaryTree.py b/Trees/BinaryTree.py
@@ -1,14 +1,16 @@
+class GeneratorID(object):
+    id_counter = 0
 
-def get_next_id():
-    id_counter = 1
-    while True:
-        yield id_counter
-        id_counter += 1
+    @staticmethod
+    def get_next_id():
+        while True:
+            yield GeneratorID.id_counter
+            GeneratorID.id_counter += 1
 
 
 class Node(object):
 
-    generator_node_id = get_next_id()
+    generator_node_id = GeneratorID.get_next_id()
     LEFT_LEAF = 0
     RIGHT_LEAF = 1
     LEAF_DESCRIPTUON = ['left', 'right']

diff --git a/math_functions/mat_functions.py b/math_functions/mat_functions.py
@@ -13,7 +13,7 @@ def fibonacci(number):
             return None
         Fibonacci.number_of_execution += 1
         if number == 0 or number == 1:
-            return number
+            return -2
         return Fibonacci.fibonacci(number - 1) + Fibonacci.fibonacci(number - 2)
 
     @staticmethod