The directory state tree currently relies on some static members that need to be reset when rerunning the test.

bindings/bindingtester/tests/directory_state_tree.py

@@ -12,6 +12,12 @@ class DirectoryStateTreeNode:
     # Used for debugging
     dir_id = 0  
 
+    @classmethod
+    def reset(cls):
+        cls.dir_id = 0
+        cls.layers = {}
+        cls.default_directory = None
+
     @classmethod
     def set_default_directory(cls, default_directory):
         cls.default_directory = default_directory

bindings/bindingtester/tests/directory_util.py

@@ -37,6 +37,7 @@ DIRECTORY_ERROR_STRING = 'DIRECTORY_ERROR'
 
 def setup_directories(instructions, default_path, random):
     # Clients start with the default directory layer in the directory list
+    DirectoryStateTreeNode.reset()
     dir_list = [DirectoryStateTreeNode.get_layer('\xfe')]
 
     instructions.push_args(0, '\xfe')