Enhanced AtomNode parsing by name

tests/non_reg/test_sheerka_non_reg.py

@@ -192,18 +192,16 @@ as:
         assert sheerka.isinstance(res[0].value, BuiltinConcepts.NOP)
 
     def test_i_can_recognize_concept_with_variable(self):
-        sheerka = self.get_sheerka()
-        concept_hello = Concept(name="hello a").def_var("a")
-        concept_foo = Concept(name="foo")
-        sheerka.add_in_cache(concept_hello)
-        sheerka.add_in_cache(concept_foo)
+        sheerka, context,  concept_foo, concept_hello = self.init_concepts(
+            "foo",
+            Concept(name="hello a").def_var("a"),
+            create_new=True)
 
         res = sheerka.evaluate_user_input("hello foo")
         return_value = res[0].value
         assert len(res) == 1
         assert res[0].status
         assert sheerka.isinstance(return_value, concept_hello)
-        assert return_value.metadata.variables[0] == ('a', "foo")
 
         # sanity check
         evaluated = sheerka.evaluate_concept(self.get_context(eval_body=True), return_value)
@@ -864,12 +862,10 @@ as:
         sheerka = self.init_scenario(definitions)
 
         res = sheerka.evaluate_user_input("eval mult")
-
         assert res[0].status
         assert isinstance(res[0].body, Concept)
 
         # res = sheerka.evaluate_user_input("eval a mult b")
-        #
         # assert res[0].status
         # assert isinstance(res[0].body, Concept)