"""Chunker unit tests (ported from the prototype smoke test + extra cases)."""

from __future__ import annotations

import pytest

from contract_check.core.analysis.chunker import chunk_text


def test_short_text_returns_single_chunk() -> None:
    assert chunk_text("одна строка", max_chars=100) == ["одна строка"]


def test_respects_max_chars() -> None:
    text = "\n".join(f"Абзац номер {i}." for i in range(500))
    chunks = chunk_text(text, max_chars=100)
    assert chunks
    assert all(len(c) <= 100 for c in chunks)


def test_nonpositive_max_chars_raises() -> None:
    with pytest.raises(ValueError):
        chunk_text("abc", max_chars=0)