# import pytest
# from core.builtin_concepts import ReturnValueConcept
# from core.concept import Concept
# from evaluators.RetEvaluator import RetEvaluator
#
# from tests.BaseTest import BaseTest
# from tests.TestUsingMemoryBasedSheerka import TestUsingMemoryBasedSheerka
#
#
# class TestRetEvaluator(TestUsingMemoryBasedSheerka):
#
#     @pytest.mark.parametrize("ret_val, expected", [
#         (ReturnValueConcept("who", True, Concept("foo", ret="bar")), True),
#         (ReturnValueConcept("who", False, Concept("foo", ret="bar")), False),
#         (ReturnValueConcept("who", True, Concept("foo")), False),
#         (BaseTest.pretval(Concept("foo", ret="bar")), False),
#         (ReturnValueConcept("who", True, "not even a concept"), False),
#     ])
#     def test_i_can_match(self, ret_val, expected):
#         context = self.get_context()
#         assert RetEvaluator().matches(context, ret_val) == expected
#
#     def test_i_can_evaluate_fully_initialized(self):
#         sheerka, context, foo, the_concept = self.init_concepts("foo", Concept("the concept", ret="a").def_var("a"))
#
#         instance = sheerka.new("the concept")
#         instance.set_value("a", sheerka.new("foo"))
#         ret_value = self.tretval(sheerka, instance)
#
#         res = RetEvaluator().eval(context, ret_value)
#         assert res.status
#         assert sheerka.isinstance(res.body, "foo")
#
#     @pytest.mark.parametrize("instance, expected", [
#         (Concept("with ret", ret="a").def_var("a", "foo"), "foo"),
#         (Concept("with ret", ret="a", body="10").def_var("a", "foo"), "foo"),
#         (Concept("with ret", ret="a").def_var("a", "bar"), "bar"),
#     ])
#     def test_i_can_evaluate(self, instance, expected):
#         sheerka, context, foo, bar = self.init_concepts("foo", Concept("bar", body="10"))
#
#         ret_value = self.tretval(sheerka, instance)
#
#         res = RetEvaluator().eval(context, ret_value)
#         assert res.status
#         assert sheerka.isinstance(res.body, expected)
#