Added concept 'isa' other_concept functionality

tests/test_sheerka_non_reg.py

@@ -30,6 +30,32 @@ def init_test():
     os.chdir(current_pwd)
 
 
+def get_sheerka(use_dict=True, skip_builtins_in_db=True):
+    root = "mem://" if use_dict else root_folder
+    sheerka = Sheerka(skip_builtins_in_db=skip_builtins_in_db)
+    sheerka.initialize(root)
+
+    return sheerka
+
+
+def get_context(sheerka):
+    return ExecutionContext("test", "xxx", sheerka)
+
+
+def get_default_concept():
+    concept = Concept(
+        name="a + b",
+        where="isinstance(a, int) and isinstance(b, int)",
+        pre="isinstance(a, int) and isinstance(b, int)",
+        post="isinstance(res, int)",
+        body="def func(x,y):\n    return x+y\nfunc(a,b)",
+        desc="specific description")
+    concept.set_prop("a", "value1")
+    concept.set_prop("b", "value2")
+
+    return concept
+
+
 @pytest.mark.parametrize("text, expected", [
     ("1 + 1", 2),
     ("sheerka.test()", 'I have access to Sheerka !')
@@ -382,27 +408,11 @@ def test_i_can_eval_bnf_definitions_from_separate_instances():
     assert sheerka.isinstance(res[0].value, concept_b)
 
 
-def get_sheerka(use_dict=True, skip_builtins_in_db=True):
-    root = "mem://" if use_dict else root_folder
-    sheerka = Sheerka(skip_builtins_in_db=skip_builtins_in_db)
-    sheerka.initialize(root)
+def test_i_can_say_that_a_concept_isa_another_concept():
+    sheerka = get_sheerka()
+    sheerka.evaluate_user_input("def concept foo")
+    sheerka.evaluate_user_input("def concept bar")
 
-    return sheerka
-
-
-def get_context(sheerka):
-    return ExecutionContext("test", "xxx", sheerka)
-
-
-def get_default_concept():
-    concept = Concept(
-        name="a + b",
-        where="isinstance(a, int) and isinstance(b, int)",
-        pre="isinstance(a, int) and isinstance(b, int)",
-        post="isinstance(res, int)",
-        body="def func(x,y):\n    return x+y\nfunc(a,b)",
-        desc="specific description")
-    concept.set_prop("a", "value1")
-    concept.set_prop("b", "value2")
-
-    return concept
+    res = sheerka.evaluate_user_input("foo isa bar")
+    assert res[0].status
+    assert sheerka.isinstance(res[0].body, BuiltinConcepts.SUCCESS)