from __future__ import annotations

from pathlib import Path

from knoe.ops.files import write_if_changed


def test_write_if_changed(tmp_path: Path):
    p = tmp_path / "a.txt"

    assert write_if_changed(p, "hello\n") is True
    assert p.read_text(encoding="utf-8") == "hello\n"

    # Unchanged
    assert write_if_changed(p, "hello\n") is False

    # Changed
    assert write_if_changed(p, "hello2\n") is True
    assert p.read_text(encoding="utf-8") == "hello2\n"