Fixed #9 : I can parse 'def concept'

tests/base.py

@@ -4,7 +4,10 @@ from os import path
 
 import pytest
 
+from core.BuiltinConcepts import BuiltinConcepts
 from core.Sheerka import Sheerka
+from helpers import _rv
+from parsers.ParserInput import ParserInput
 from sdp.sheerkaDataProvider import SheerkaDataProvider
 
 
@@ -32,6 +35,14 @@ class BaseTest:
         return SheerkaDataProvider("mem://", name="test")
 
 
+class BaseParserTest(BaseTest):
+    @staticmethod
+    def get_parser_input(context, command):
+        pi = ParserInput(command)
+        pi.init()
+        return _rv(context.sheerka.newn(BuiltinConcepts.PARSER_INPUT, pi=pi))
+
+
 class UsingFileBasedSheerka(BaseTest):
     TESTS_ROOT_DIRECTORY = path.abspath("../build/tests")
     SHEERKA_ROOT_DIR = os.path.join(TESTS_ROOT_DIRECTORY, ".sheerka")