Added bnf when adding a new concept + Started logging filtering

tests/test_ast.py

@@ -1,5 +1,7 @@
 import ast
 
+import pytest
+
 from core.ast.nodes import NodeParent, GenericNodeConcept
 import core.ast.nodes
 from core.ast.visitors import ConceptNodeVisitor, UnreferencedNamesVisitor
@@ -102,7 +104,7 @@ def my_function(a,b):
     assert sheerka.value(visitor.names[6]) == "a"
 
 
-def test_i_can_get_non_referenced_variables():
+def test_i_can_get_unreferenced_variables():
     source = """
 def my_function(a,b):
     for i in range(b):
@@ -126,6 +128,23 @@ my_function(x,y)
     assert "y" in values
 
 
+@pytest.mark.parametrize("source, expected", [
+    ("a,b", ["a", "b"]),
+    ("isinstance(a, int)", ["a", "int"])
+
+])
+def test_i_can_get_unreferenced_variables_from_simple_expressions(source, expected):
+    sheerka = get_sheerka()
+
+    node = ast.parse(source)
+    concept_node = core.ast.nodes.python_to_concept(node)
+
+    visitor = UnreferencedNamesVisitor(sheerka)
+    visitor.visit(concept_node)
+
+    assert sorted(list(visitor.names)) == expected
+
+
 def test_i_can_compare_NodeParent_with_tuple():
     node_parent = NodeParent(GenericNodeConcept("For", None), "target")
     assert node_parent == ("For", "target")