You must now use 'eval' to get the body of a concept

tests/test_BnfParser.py

@@ -7,13 +7,14 @@ from parsers.BaseParser import UnexpectedTokenErrorNode
 from parsers.BnfParser import BnfParser, UnexpectedEndOfFileError
 from parsers.ConceptLexerParser import StrMatch, Optional, ZeroOrMore, OrderedChoice, Sequence, OneOrMore, \
     ConceptLexerParser, ConceptNode, ConceptMatch
+from sdp.sheerkaDataProvider import Event
 
 
 def get_context():
     sheerka = Sheerka(skip_builtins_in_db=True)
     sheerka.initialize("mem://")
 
-    return ExecutionContext("sheerka", "xxxx", sheerka)
+    return ExecutionContext("sheerka", Event(), sheerka)
 
 
 @pytest.mark.parametrize("expression, expected", [