import sys
import os

sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))

from main import chunk_text


def test_chunk_text_empty_returns_empty_list():
    assert chunk_text("") == []


def test_chunk_text_shorter_than_chunk_size_returns_single_chunk():
    assert chunk_text("hello", chunk_size=1000, overlap=100) == ["hello"]


def test_chunk_text_exact_multiple_of_chunk_size():
    text = "a" * 20
    chunks = chunk_text(text, chunk_size=10, overlap=2)
    assert chunks == [text[0:10], text[8:18], text[16:20]]