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# gemato: compressed file tests
# vim:fileencoding=utf-8
# (c) 2017 Michał Górny
# Licensed under the terms of 2-clause BSD license
import base64
import io
import unittest
import gemato.compression
TEST_STRING = b'The quick brown fox jumps over the lazy dog'
class GzipCompressionTest(unittest.TestCase):
BASE64 = b'''
H4sIACbJ8FkAAwvJSFUoLM1MzlZIKsovz1NIy69QyCrNLShWyC9LLVIoAUrnJFZVKqTkpwMAOaNP
QSsAAAA=
'''
EMPTY_BASE64 = b'''
H4sIACbJ8FkAAwMAAAAAAAAAAAA=
'''
SPLIT_BASE64 = b'''
H4sIACbJ8FkAAwvJSFUoLM1MzlZIKsovz1NIy69QAADidbCIFAAAAB+LCAAmyfBZAAPLKs0tKFbI
L0stUijJSFXISayqVEjJTwcAlGd4GBcAAAA=
'''
def test_gzip(self):
with io.BytesIO(base64.b64decode(self.BASE64)) as f:
with gemato.compression.open_compressed_file('gz', f, "rb") as gz:
self.assertEqual(gz.read(), TEST_STRING)
def test_gzip_empty(self):
with io.BytesIO(base64.b64decode(self.EMPTY_BASE64)) as f:
with gemato.compression.open_compressed_file('gz', f, "rb") as gz:
self.assertEqual(gz.read(), b'')
def test_gzip_split(self):
with io.BytesIO(base64.b64decode(self.SPLIT_BASE64)) as f:
with gemato.compression.open_compressed_file('gz', f, "rb") as gz:
self.assertEqual(gz.read(), TEST_STRING)
def test_gzip_write(self):
with io.BytesIO() as f:
with gemato.compression.open_compressed_file('gz', f, 'wb') as gz:
gz.write(TEST_STRING)
f.seek(0)
with gemato.compression.open_compressed_file('gz', f, 'rb') as gz:
self.assertEqual(gz.read(), TEST_STRING)
class Bzip2CompressionTest(unittest.TestCase):
BASE64 = b'''
QlpoOTFBWSZTWUWd7mEAAAQTgEAABAA////wIAEABTQAAAGigAAAAEBoLtBqVm1CpOmzyfUXAw5P
HXD0304jMvvfF3JFOFCQRZ3uYQ==
'''
EMPTY_BASE64 = b'''
QlpoORdyRThQkAAAAAA=
'''
SPLIT_BASE64 = b'''
QlpoOTFBWSZTWQgcCrAAAAITgEAABAAbabLAIABBEaDR6jT9UoAAAbUXZJ48gnMg3xdyRThQkAgc
CrBCWmg5MUFZJlNZOxleaAAABRGAQAAm1t8wIACAUaNDRtTaSgAAAcAcViIdSEhzctM/F3JFOFCQ
OxleaA==
'''
def test_bzip2(self):
with io.BytesIO(base64.b64decode(self.BASE64)) as f:
try:
with gemato.compression.open_compressed_file('bz2', f, "rb") as bz2:
self.assertEqual(bz2.read(), TEST_STRING)
except gemato.exceptions.UnsupportedCompression:
raise unittest.SkipTest('bz2 compression unsupported')
def test_bzip2_empty(self):
with io.BytesIO(base64.b64decode(self.EMPTY_BASE64)) as f:
try:
with gemato.compression.open_compressed_file('bz2', f, "rb") as bz2:
self.assertEqual(bz2.read(), b'')
except gemato.exceptions.UnsupportedCompression:
raise unittest.SkipTest('bz2 compression unsupported')
def test_bzip2_split(self):
with io.BytesIO(base64.b64decode(self.SPLIT_BASE64)) as f:
try:
with gemato.compression.open_compressed_file('bz2', f, "rb") as bz2:
self.assertEqual(bz2.read(), TEST_STRING)
except gemato.exceptions.UnsupportedCompression:
raise unittest.SkipTest('bz2 compression unsupported')
def test_bzip2_write(self):
with io.BytesIO() as f:
try:
with gemato.compression.open_compressed_file('bz2', f, 'wb') as bz2:
bz2.write(TEST_STRING)
f.seek(0)
with gemato.compression.open_compressed_file('bz2', f, 'rb') as bz2:
self.assertEqual(bz2.read(), TEST_STRING)
except gemato.exceptions.UnsupportedCompression:
raise unittest.SkipTest('bz2 compression unsupported')
class LZMALegacyCompressionTest(unittest.TestCase):
BASE64 = b'''
XQAAAAT//////////wAqGgiiAyVm8Ut4xaIF/y7m2dIgGq00+OId6EE2+twGabs85BA0Jwnrs2bs
Ghcv//zOkAA=
'''
EMPTY_BASE64 = b'''
XQAAAAT//////////wCD//v//8AAAAA=
'''
SPLIT_BASE64 = b'''
XQAAAAT//////////wAqGgiiAyVm8Ut4xaIF/y7m2dIgGq1EvQql//X0QABdAAAABP//////////
ADUdSd6zBOkOpekGFH46zix9wE9VT65OVeV479//7uUAAA==
'''
def test_lzma_legacy(self):
with io.BytesIO(base64.b64decode(self.BASE64)) as f:
try:
with gemato.compression.open_compressed_file('lzma', f, "rb") as lzma:
self.assertEqual(lzma.read(), TEST_STRING)
except gemato.exceptions.UnsupportedCompression:
raise unittest.SkipTest('lzma compression unsupported')
def test_lzma_legacy_empty(self):
with io.BytesIO(base64.b64decode(self.EMPTY_BASE64)) as f:
try:
with gemato.compression.open_compressed_file('lzma', f, "rb") as lzma:
self.assertEqual(lzma.read(), b'')
except gemato.exceptions.UnsupportedCompression:
raise unittest.SkipTest('lzma compression unsupported')
def test_lzma_legacy_split(self):
with io.BytesIO(base64.b64decode(self.SPLIT_BASE64)) as f:
try:
with gemato.compression.open_compressed_file('lzma', f, "rb") as lzma:
self.assertEqual(lzma.read(), TEST_STRING)
except gemato.exceptions.UnsupportedCompression:
raise unittest.SkipTest('lzma compression unsupported')
def test_lzma_legacy_write(self):
with io.BytesIO() as f:
try:
with gemato.compression.open_compressed_file('lzma', f, 'wb') as lzma:
lzma.write(TEST_STRING)
f.seek(0)
with gemato.compression.open_compressed_file('lzma', f, 'rb') as lzma:
self.assertEqual(lzma.read(), TEST_STRING)
except gemato.exceptions.UnsupportedCompression:
raise unittest.SkipTest('lzma compression unsupported')
def test_lzma_legacy_as_xz(self):
"""
Test that the class rejects mislabel files.
"""
if gemato.compression.lzma is None:
raise unittest.SkipTest('xz compression unsupported')
with io.BytesIO(base64.b64decode(self.BASE64)) as f:
with self.assertRaises(gemato.compression.lzma.LZMAError):
with gemato.compression.open_compressed_file('xz', f, "rb") as xz:
xz.read()
class XZCompressionTest(unittest.TestCase):
BASE64 = b'''
/Td6WFoAAATm1rRGAgAhARwAAAAQz1jMAQAqVGhlIHF1aWNrIGJyb3duIGZveCBqdW1wcyBvdmVy
IHRoZSBsYXp5IGRvZwAAxKFK5cK4XlsAAUMrrVBuVx+2830BAAAAAARZWg==
'''
EMPTY_BASE64 = b'''
/Td6WFoAAATm1rRGAAAAABzfRCEftvN9AQAAAAAEWVo=
'''
SPLIT_BASE64 = b'''
/Td6WFoAAATm1rRGAgAhARwAAAAQz1jMAQATVGhlIHF1aWNrIGJyb3duIGZveCAAIEFC5acaLXcA
ASwU+AptAx+2830BAAAAAARZWv03elhaAAAE5ta0RgIAIQEcAAAAEM9YzAEAFmp1bXBzIG92ZXIg
dGhlIGxhenkgZG9nAADjZCTmHjHqggABLxeBCEmxH7bzfQEAAAAABFla
'''
def test_xz(self):
with io.BytesIO(base64.b64decode(self.BASE64)) as f:
try:
with gemato.compression.open_compressed_file('xz', f, "rb") as xz:
self.assertEqual(xz.read(), TEST_STRING)
except gemato.exceptions.UnsupportedCompression:
raise unittest.SkipTest('xz compression unsupported')
def test_xz_empty(self):
with io.BytesIO(base64.b64decode(self.EMPTY_BASE64)) as f:
try:
with gemato.compression.open_compressed_file('xz', f, "rb") as xz:
self.assertEqual(xz.read(), b'')
except gemato.exceptions.UnsupportedCompression:
raise unittest.SkipTest('xz compression unsupported')
def test_xz_split(self):
with io.BytesIO(base64.b64decode(self.SPLIT_BASE64)) as f:
try:
with gemato.compression.open_compressed_file('xz', f, "rb") as xz:
self.assertEqual(xz.read(), TEST_STRING)
except gemato.exceptions.UnsupportedCompression:
raise unittest.SkipTest('xz compression unsupported')
def test_xz_write(self):
with io.BytesIO() as f:
try:
with gemato.compression.open_compressed_file('xz', f, 'wb') as xz:
xz.write(TEST_STRING)
f.seek(0)
with gemato.compression.open_compressed_file('xz', f, 'rb') as xz:
self.assertEqual(xz.read(), TEST_STRING)
except gemato.exceptions.UnsupportedCompression:
raise unittest.SkipTest('xz compression unsupported')
def test_xz_as_lzma_legacy(self):
"""
Test that the class rejects mislabel files.
"""
if gemato.compression.lzma is None:
raise unittest.SkipTest('xz compression unsupported')
with io.BytesIO(base64.b64decode(self.BASE64)) as f:
with self.assertRaises(gemato.compression.lzma.LZMAError):
with gemato.compression.open_compressed_file('lzma', f, "rb") as lzma:
lzma.read()
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