import pytest

from experiments import loader


def test_lists_human_readable_hypotheses():
    names = loader.list_hypotheses()
    assert "Compute Gravity Before Building Object Instances" in names
    assert all(not name.endswith(".py") for name in names)


def test_loads_filename_with_spaces():
    module = loader.load_hypothesis("Compute Gravity Before Building Object Instances")
    assert callable(module.build_spatial_code)
    assert callable(module.dump_spatial_code)


def test_missing_hypothesis_has_clear_error():
    with pytest.raises(FileNotFoundError, match="hypothesis does not exist"):
        loader.load_hypothesis("This Does Not Exist")