Fixed infinite recursion when parsing complex BNF node

tests/core/test_SheerkaVariableManager.py

@@ -1,5 +1,4 @@
 from core.concept import Concept, ConceptParts
-from core.sheerka.Sheerka import Sheerka
 from core.sheerka.services.SheerkaVariableManager import SheerkaVariableManager
 
 from tests.TestUsingMemoryBasedSheerka import TestUsingMemoryBasedSheerka
@@ -50,6 +49,26 @@ class TestSheerkaVariable(TestUsingMemoryBasedSheerka):
         sheerka.delete(context, "TestSheerkaVariable", "my_variable")
         assert sheerka.load("TestSheerkaVariable", "my_variable") is None
 
+    def test_i_can_set_and_get_a_value(self):
+        sheerka = self.get_sheerka(cache_only=False)
+        context = self.get_context(sheerka)
+        context.event.user_id = "Test_user"
+
+        sheerka.set(context, "my_variable", "my value")
+        res = sheerka.get(context, "my_variable")
+        assert res == "my value"
+
+        # I can persist in db
+        sheerka.cache_manager.commit(context)
+
+        assert sheerka.sdp.exists(SheerkaVariableManager.VARIABLES_ENTRY, "Test_user|my_variable")
+        loaded = sheerka.sdp.get(SheerkaVariableManager.VARIABLES_ENTRY, "Test_user|my_variable")
+        assert loaded.event_id == context.event.get_digest()
+        assert loaded.key == "my_variable"
+        assert loaded.value == "my value"
+        assert loaded.who == "Test_user"
+        assert loaded.parents is None
+
     # def test_i_can_get_the_parent_when_modified(self):
     #     sheerka = self.get_sheerka()
     #     context = self.get_context(sheerka)