fixed #18 : I can evaluate concept

tests/core/test_sheerka.py

@@ -1,6 +1,9 @@
 from os import path
 
+import pytest
+
 from base import UsingFileBasedSheerka
+from core.concept import ConceptDefaultProps
 from helpers import get_concept, get_concepts, get_file_content
 
 
@@ -34,3 +37,20 @@ class TestSheerka(UsingFileBasedSheerka):
         assert not sheerka.isinstance(foo, bar.str_id)
         assert not sheerka.isinstance(foo, bar)
         assert not sheerka.isinstance(foo, bar.get_metadata())
+
+    @pytest.mark.parametrize("obj, expected", [
+        (None, None),
+        (1, 1),
+    ])
+    def test_i_can_get_obj_value(self, sheerka, context, obj, expected):
+        assert sheerka.objvalue(obj) == expected
+
+    def test_i_can_get_obj_value_for_concept(self, sheerka, context):
+        foo = get_concept("foo")
+        bar = get_concept("bar")
+        bar.set_value(ConceptDefaultProps.BODY, 1)
+        foo.set_value(ConceptDefaultProps.BODY, bar)
+        foo.get_runtime_info().is_evaluated = True
+        bar.get_runtime_info().is_evaluated = True
+
+        assert sheerka.objvalue(foo) == 1