auto-archiver/tests/enrichers/test_hash_enricher.py

import pytest

from auto_archiver.modules.hash_enricher import HashEnricher
from auto_archiver.core import Metadata, Media

@pytest.mark.parametrize("algorithm, filename, expected_hash", [
    ("SHA-256", "tests/data/testfile_1.txt", "1b4f0e9851971998e732078544c96b36c3d01cedf7caa332359d6f1d83567014"),
    ("SHA-256", "tests/data/testfile_2.txt", "60303ae22b998861bce3b28f33eec1be758a213c86c93c076dbe9f558c11c752"),
    ("SHA3-512", "tests/data/testfile_1.txt", "d2d8cc4f369b340130bd2b29b8b54e918b7c260c3279176da9ccaa37c96eb71735fc97568e892dc6220bf4ae0d748edb46bd75622751556393be3f482e6f794e"),
    ("SHA3-512", "tests/data/testfile_2.txt", "e35970edaa1e0d8af7d948491b2da0450a49fd9cc1e83c5db4c6f175f9550cf341f642f6be8cfb0bfa476e4258e5088c5ad549087bf02811132ac2fa22b734c6")
])
def test_calculate_hash(algorithm, filename, expected_hash):
    # test SHA-256
    he = HashEnricher({"algorithm": algorithm, "chunksize": 1})
    assert he.calculate_hash(filename) == expected_hash

def test_default_config_values():
    he = HashEnricher(config={})
    assert he.algorithm == "SHA-256"
    assert he.chunksize == 16000000

def test_invalid_chunksize():
    with pytest.raises(AssertionError):
        he = HashEnricher({"chunksize": "-100"})

def test_invalid_algorithm():
    with pytest.raises(AssertionError):
        HashEnricher({"algorithm": "SHA-123"})

def test_config():
    # test default config
    c = HashEnricher.configs()
    assert c["algorithm"]["default"] == "SHA-256"
    assert c["chunksize"]["default"] == 16000000
    assert c["algorithm"]["choices"] == ["SHA-256", "SHA3-512"]
    assert c["algorithm"]["help"] == "hash algorithm to use"
    assert c["chunksize"]["help"] == "number of bytes to use when reading files in chunks (if this value is too large you will run out of RAM), default is 16MB"

def test_hash_media():

    he = HashEnricher({"algorithm": "SHA-256", "chunksize": 1})

    # generate metadata with two test files
    m = Metadata().set_url("https://example.com")

    # noop - the metadata has no media. Shouldn't fail
    he.enrich(m)

    m.add_media(Media("tests/data/testfile_1.txt"))
    m.add_media(Media("tests/data/testfile_2.txt"))

    he.enrich(m)

    assert m.media[0].get("hash") == "SHA-256:1b4f0e9851971998e732078544c96b36c3d01cedf7caa332359d6f1d83567014"
    assert m.media[1].get("hash") == "SHA-256:60303ae22b998861bce3b28f33eec1be758a213c86c93c076dbe9f558c11c752"