Fixed #32 : concept groups are not correctly updated

Fixed #35 : Refactor test helper class (CNC, CC, CIO)
Fixed #36 : Concept values are not used when declared with variable expression
Fixed #37 : Objects in memory lose their values are restart
Fixed #38 : func(a=b, c) (which is not allowed) raise an exception

src/parsers/SyaNodeParser.py

@@ -12,7 +12,7 @@ from core.sheerka.services.SheerkaExecute import ParserInput
 from core.tokenizer import Token, TokenKind, Tokenizer
 from core.utils import get_n_clones, get_text_from_tokens, NextIdManager
 from parsers.BaseNodeParser import UnrecognizedTokensNode, ConceptNode, SourceCodeNode, SyaAssociativity, \
-    SourceCodeWithConceptNode, BaseNodeParser
+    SourceCodeWithConceptNode, BaseNodeParser, VariableNode
 from parsers.BaseParser import ParsingError
 
 PARSERS = ["Sequence", "Bnf", "Python"]
@@ -1262,7 +1262,7 @@ class SyaNodeParser(BaseNodeParser):
 
     def postfix_to_item(self, sheerka, postfixed):
         item = postfixed.pop()
-        if isinstance(item, (UnrecognizedTokensNode, SourceCodeNode, ConceptNode)):
+        if isinstance(item, (UnrecognizedTokensNode, SourceCodeNode, ConceptNode, VariableNode)):
             return item
 
         if isinstance(item, SourceCodeWithConceptNode):