import pytest

from sonde.loader import load, module_docstring, search_paths


def test_search_paths_covers_flat_and_src_layouts(tmp_path):
    (tmp_path / "src").mkdir()
    assert search_paths(tmp_path) == [str(tmp_path), str(tmp_path / "src")]
    assert search_paths(tmp_path / "src") == [str(tmp_path / "src")]


def test_load_walks_a_dotted_path(repo_root):
    assert load(repo_root, "sonde.loader").name == "loader"
    assert load(repo_root, "sonde.artifacts.Artifact").name == "Artifact"


def test_a_missing_package_names_where_we_looked(repo_root):
    with pytest.raises(ValueError, match="no package 'nosuchpkg' under"):
        load(repo_root, "nosuchpkg")


def test_a_missing_member_names_the_failing_segment(repo_root):
    with pytest.raises(ValueError, match=r"failed at 'Ghost' under 'sonde\.loader'"):
        load(repo_root, "sonde.loader.Ghost")


def test_module_docstring_of_a_script_without_one():
    assert module_docstring("x = 1\n") == ""
    assert module_docstring('"""Summary."""\nx = 1\n') == "Summary."