import core.utils
import pytest


@pytest.mark.parametrize("lst, as_string", [
    (None, "",),
    ([], ""),
    (["hello", "world"], "hello world"),
   # (["hello world", "my friend"], '"hello world" "my friend"')
])
def test_i_can_create_string_from_a_list(lst, as_string):
    assert core.utils.sysarg_to_string(lst) == as_string


def test_i_can_get_classes():
    classes = list(core.utils.get_classes("core.builtin_concepts"))
    error_concept = core.utils.get_class("core.builtin_concepts.ErrorConcept")
    return_value_concept = core.utils.get_class("core.builtin_concepts.ReturnValueConcept")

    assert len(classes) > 2
    assert error_concept in classes
    assert return_value_concept in classes