"""Unit tests for DocumentHasher."""

from pathlib import Path

from app.dedup.hasher import DocumentHasher


def test_compute_sha256(sample_pdf: Path) -> None:
    h1 = DocumentHasher.compute_sha256(sample_pdf)
    h2 = DocumentHasher.compute_sha256(sample_pdf)
    assert len(h1) == 64
    assert h1 == h2


def test_compute_simhash() -> None:
    text1 = "Khmer document corpus testing text"
    text2 = "Khmer document corpus testing text extra"
    text3 = "Unrelated contents entirely"

    s1 = DocumentHasher.compute_simhash(text1)
    s2 = DocumentHasher.compute_simhash(text2)
    s3 = DocumentHasher.compute_simhash(text3)

    assert isinstance(s1, int)
    assert s1 != s3
    assert s2 != s3