Implemented dictionnary based file system to speed up the tests

tests/test_DefaultParser.py

@@ -1,36 +1,12 @@
-import os
-import shutil
-
 import pytest
-from os import path
 import ast
 
 from core.builtin_concepts import ParserResultConcept, BuiltinConcepts, ReturnValueConcept
 from core.sheerka import Sheerka, ExecutionContext
-from parsers.BaseParser import BaseParser
-from parsers.PythonParser import PythonParser, PythonNode, PythonErrorNode
+from parsers.PythonParser import PythonParser, PythonNode
 from core.tokenizer import Keywords, Tokenizer
 from parsers.DefaultParser import DefaultParser, NameNode, SyntaxErrorNode
-# from parsers.DefaultParser import NumberNode, StringNode, VariableNode, TrueNode, FalseNode, NullNode, BinaryNode
-from parsers.DefaultParser import UnexpectedTokenErrorNode, DefConceptNode, NopNode
-
-tests_root = path.abspath("../build/tests")
-root_folder = "init_folder"
-
-
-@pytest.fixture(autouse=True)
-def init_test():
-    if path.exists(tests_root):
-        shutil.rmtree(tests_root)
-
-    if not path.exists(tests_root):
-        os.makedirs(tests_root)
-    current_pwd = os.getcwd()
-    os.chdir(tests_root)
-
-    yield None
-    os.chdir(current_pwd)
-
+from parsers.DefaultParser import UnexpectedTokenErrorNode, DefConceptNode
 
 # def nop():
 #     return NopNode()
@@ -92,7 +68,7 @@ def get_concept(name, where=None, pre=None, post=None, body=None):
 
 def get_context():
     sheerka = Sheerka()
-    sheerka.initialize(root_folder)
+    sheerka.initialize("mem://")
     return ExecutionContext("test", "xxx", sheerka)