import re

from engine.fetch_code import fetch_code


def test_return_shape():
    items, line_count, ignored = fetch_code()
    assert isinstance(items, list)
    assert line_count == len(items)
    assert ignored == 0


def test_items_are_tuples():
    items, _, _ = fetch_code()
    assert items, "expected at least one code line"
    for item in items:
        assert isinstance(item, tuple) and len(item) == 3
        text, src, ts = item
        assert isinstance(text, str)
        assert isinstance(src, str)
        assert isinstance(ts, str)


def test_blank_and_comment_lines_excluded():
    items, _, _ = fetch_code()
    for text, _, _ in items:
        assert text.strip(), "blank line should have been filtered"
        assert not text.strip().startswith("#"), "comment line should have been filtered"


def test_module_path_format():
    items, _, _ = fetch_code()
    pattern = re.compile(r"^engine\.\w+$")
    for _, _, ts in items:
        assert pattern.match(ts), f"unexpected module path: {ts!r}"