import pytest

from langchain.document_loaders import DirectoryLoader


def test_raise_error_if_path_not_exist() -> None:
    loader = DirectoryLoader("./not_exist_directory")
    with pytest.raises(FileNotFoundError) as e:
        loader.load()

    assert str(e.value) == "Directory not found: './not_exist_directory'"


def test_raise_error_if_path_is_not_directory() -> None:
    loader = DirectoryLoader(__file__)
    with pytest.raises(ValueError) as e:
        loader.load()

    assert str(e.value) == f"Expected directory, got file: '{__file__}'"