def test_reproducability_of_hashing(self):
""" Test reproducability of block hashing with history """
gen = RK_hash_generator(BUFFERSIZE, HASHRANGE)
assert_equal(self.hgen.hash_block_with_history('1234567890123456'),
self.hgen.hash_block_with_history('1234567890123456')) # using the same generator
assert_equal(self.hgen.hash_block_with_history('1234567890123456'),
gen.hash_block_with_history('1234567890123456')) # using other generator
def test_init(self):
""" Test initialisation of the Rabin & Karp generator """
# Test instatiation of class variables
test_gen = RK_hash_generator(BUFFERSIZE, HASHRANGE)
assert_equal(test_gen.block_size, BUFFERSIZE)
assert_equal(test_gen.prev_hash, 0)
assert_equal(test_gen.base, 10)
assert_equal(test_gen.chars, None)
assert_equal(test_gen.hash_range, HASHRANGE)
def test_compare_hash_block_against_incremental(self):
""" Compare hash block generation versus incremental hash generation """
gen = RK_hash_generator(BUFFERSIZE, HASHRANGE)
hash1 = gen.hash_block('2345678901234567')
self.hgen.hash_block_with_history('1234567890123456')
hash2 = self.hgen.incremental('7')
assert_equal(hash1, hash2)
hash1 = gen.hash_block('3456789012345678')
hash2 = self.hgen.incremental('8')
assert_equal(hash1, hash2)
def test_incremental_with_history(self):
""" Running increment method after hashing block with history """
gen = RK_hash_generator(BUFFERSIZE, HASHRANGE)
gen.hash_block_with_history('1234567890123456')
gen.incremental('7')
def test_incremental_without_history(self):
""" Raise exception when using incremental without history established """
gen = RK_hash_generator(BUFFERSIZE, HASHRANGE)
gen.hash_block('1234567890123456')
gen.incremental('7')
def test_invalid_init_hashrange_string(self):
""" Instatiating RK hash generator with invalid hash range, string instead of integer """
test_gen = RK_hash_generator(BUFFERSIZE, 'bytearray')
def test_invalid_init_blocksize_string(self):
""" Instatiating RK hash generator with invalid blocksize, string instead of integer """
test_gen = RK_hash_generator('bytearray', HASHRANGE)
def test_invalid_init_one_parameter(self):
""" Test invalid Rabin & Karp generator class instantiation with no hash range specified """
test_gen = RK_hash_generator(BUFFERSIZE)
def test_invalid_init_no_paramaters(self):
""" Test invalid Rabin & Karp generator class instantiation with no parameters """
test_gen = RK_hash_generator()
def setup_class(self):
""" Initial configuration of TestKRFingerprinting, used by all methods """
self.hgen = RK_hash_generator(BUFFERSIZE, HASHRANGE)
