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test: add cases for src/embit/bip85.py #1

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Merged
odudex merged 1 commit into from
Jul 29, 2025
Merged

test: add cases for src/embit/bip85.py #1

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44 changes: 44 additions & 0 deletions tests/tests/test_bip85.py
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Original file line number Diff line number Diff line change
Expand Up @@ -48,12 +48,44 @@


class Bip85Test(TestCase):

def test_derive_entropy(self):
for app_index, path, expected in [
(39, [0, 12, 0], unhexlify("6250b68daf746d12a24d58b4787a714bf1b58d69e4c2a466276fb16fe93dc52b6fac6b756894072241447cad56f6405ee326dbb473d2f5e943543590082927c0")),
(2, [0], unhexlify("7040bb53104f27367f317558e78a994ada7296c6fde36a364e5baf206e502bb1f988080b7dd814e7ae7d6d83edbb6689886a560e165f4a740877cdf3beecacf8")),
(32, [0], unhexlify("52405cd0dd21c5be78314a7c1a3c65ffd8d896536cc7dee3157db5824f0c92e2ead0b33988a616cf6a497f1c169d9e92562604e38305ccd3fc96f2252c177682")),
]:
result = bip85.derive_entropy(ROOT, app_index, path)
self.assertEqual(result, expected)

def test_derive_entropy_fail_path_ge_hardened_index(self):
with self.assertRaises(ValueError) as exc:
bip85.derive_entropy(ROOT, 39, [bip32.HARDENED_INDEX + 1])
self.assertEqual(str(exc.exception), "Path elements must be less than 2^31")

def test_bip39(self):
for num_words, index, lang, expected in VECTORS_BIP39:
self.assertEqual(
bip85.derive_mnemonic(ROOT, num_words, index, language=lang), expected
)

def test_bip39_fail_num_words(self):
cases = [
(11, 0, bip85.LANGUAGES.ENGLISH),
(13, 0, bip85.LANGUAGES.ENGLISH),
(15, 0, bip85.LANGUAGES.ENGLISH),
(17, 0, bip85.LANGUAGES.ENGLISH),
(19, 0, bip85.LANGUAGES.ENGLISH),
(21, 0, bip85.LANGUAGES.ENGLISH),
(23, 0, bip85.LANGUAGES.ENGLISH),
(25, 0, bip85.LANGUAGES.ENGLISH),
]

for num_words, index, lang in cases:
with self.assertRaises(ValueError) as exc:
bip85.derive_mnemonic(ROOT, num_words, index, language=lang)
self.assertEqual(str(exc.exception), "Number of words must be 12, 18 or 24")

def test_wif(self):
for idx, expected in VECTORS_WIF:
self.assertEqual(bip85.derive_wif(ROOT, idx).wif(), expected)
Expand All @@ -67,3 +99,15 @@ def test_hex(self):
self.assertEqual(
bip85.derive_hex(ROOT, num_bytes, idx), unhexlify(expected)
)

def test_hex_fail_num_bytes_ge_64(self):
for num_bytes in [65, 100, 1000, 10000]:
with self.assertRaises(ValueError) as exc:
bip85.derive_hex(ROOT, num_bytes, 1)
self.assertEqual(str(exc.exception), "Number of bytes must be less than 64")

def test_hex_fail_num_bytes_le_16(self):
for num_bytes in [15, 14, 10, 0]:
with self.assertRaises(ValueError) as exc:
bip85.derive_hex(ROOT, num_bytes, 2)
self.assertEqual(str(exc.exception), "Number of bytes must be at least 16")