def test_fragments_error(self):
files1 = IDA.split("testfile_short.txt", 10, 5)
files2 = IDA.split("testfile_long.txt", 10, 5)
# files to assembled are not derived from the same file
with self.assertRaises(ValueError):
IDA.assemble(files1[:4] + [files2[0]])
# files to assembled are compromised
# the file "IDA/tests/testfile_short_fragment0_compromised" is a compromised version
# the file "IDA/tests/testfile_short_fragment0"
with open("testfile_short_fragment0", "r") as fh:
parameters = fh.readline()
file_hash = fh.readline()
content_hash = fh.readline()
fragment = eval(fh.readline())
fragment[-1] += 1
with open("testfile_short_fragment0_compromised", "w") as fh:
fh.write(parameters)
fh.write(file_hash)
fh.write(content_hash)
fh.write(str(fragment))
with self.assertRaises(IDA.fragment_handler.ContentError):
IDA.assemble(files1[1:5] +
["testfile_short_fragment0_compromised"])
files3 = IDA.split("testfile_short.txt", 10, 6)
# files to assembled are not output of the same split function with parameters
with self.assertRaises(ValueError):
IDA.assemble(files1[:4] + [files3[0]])
def test_numToAssemble_error(self):
files = IDA.split("testfile_short.txt", 10, 5)
# insufficient numToAssemble
with self.assertRaises(ValueError):
IDA.assemble(files[:4])
# insufficient distinct numToAssemble
with self.assertRaises(ValueError):
IDA.assemble([files[i] for i in [2, 4, 6, 8, 2]])
def test_long_file(self):
original_file = open("testfile_long.txt", "rb").read()
original_file_hash = hash(original_file)
fragments = IDA.split("testfile_long.txt", 100, 75)
test = True
for count in range(100):
fragments_to_assemble = [
fragments[i] for i in random.sample(range(100), 75)
]
output = IDA.assemble(fragments_to_assemble)
if not (original_file == bytes(output, encoding='utf8')):
test = False
break
self.assertEqual(test, True)
def test_numFragments_error(self):
# numFragments is zero
with self.assertRaises(ValueError):
IDA.split("testfile_short.txt", 0, 0)
# numFragments<numToAssemble
with self.assertRaises(ValueError):
IDA.split("testfile_short.txt", 10, 15)
# numFragments is negative
with self.assertRaises(ValueError):
IDA.split("testfile_short.txt", -1, -2)
def test_file_not_exist(self):
with self.assertRaises(FileNotFoundError):
IDA.split("notafile.xyz", 10, 4)