def test_h_rolling_non_string_key(self):
randnum = random.randint(0, 1000)
randn = random.randint(1, 100)
randstr = str(randnum)
self.assertEqual(hf.h_rolling(str(randnum), randn),
hf.h_rolling(randnum, randn))
def test_rolling_key_non_string(self):
self.assertRaises(TypeError,
lambda: hash_functions.h_rolling(int(4), 8))
self.assertRaises(TypeError,
lambda: hash_functions.h_rolling(float(4), 8))
self.assertRaises(TypeError,
lambda: hash_functions.h_rolling([5, 6], 8))
self.assertRaises(TypeError, lambda: hash_functions.h_rolling(True, 8))
def test_rolling_length_non_int(self):
self.assertRaises(
TypeError,
lambda: hash_functions.h_rolling('string', float(420.69)))
self.assertRaises(TypeError,
lambda: hash_functions.h_rolling('string', 'string'))
self.assertRaises(TypeError,
lambda: hash_functions.h_rolling('string', True))
self.assertRaises(TypeError,
lambda: hash_functions.h_rolling('string', [9, 10]))
def test_rolling_hash_empty(self):
"""
This test checks h_rolling function on an empty string
"""
self.n = 10
self.assertEqual(0, h_rolling("", self.n))
def test_linear_probe_rolling_collision(self):
for i in range(100):
test_length = rdm.randint(2, 1000)
test_value1 = rdm.randint(1, 1000)
test_value2 = rdm.randint(1, 1000)
test_key = 'teststring'
test_table = ht.LinearProbe(test_length, hf.h_rolling)
test_table.add(test_key, test_value1)
test_table.add(test_key, test_value2)
self.assertEqual(test_value1, test_table.search(test_key))
if test_table.N - 1 == hf.h_rolling(test_key, test_length):
self.assertEqual((test_key, test_value2), test_table.T[0])
continue
self.assertEqual(
(test_key, test_value2),
test_table.T[hf.h_rolling(test_key, test_length) + 1])
def test_h_rolling_single_char(self):
randval = random.randint(32, 126)
randn = random.randint(1, 100)
s = randval % 2**64
self.assertEqual(s % randn, hf.h_rolling(str(chr(randval)), randn))
def test_rolling_hash(self):
"""
This test checks h_rolling function on a random string of length 10
"""
self.n = 10
self.rand_string, self.hash_value = self.make_rand_rolling_hash(self.n)
self.assertEqual(self.hash_value, h_rolling(self.rand_string, self.n))
def test_output_random_input(self):
for i in range(1000):
random_hash = ''.join([
random.choice(string.ascii_letters + string.digits +
string.punctuation) for n in range(32)
])
random_N = random.randint(1, 1000)
self.assertLess(hf.h_rolling(random_hash, random_N), random_N)
def test_rolling_constant_key(self):
k = 107 * 53**0
e = 101 * 53**1
y = 121 * 53**2
s = (k + e + y) % (2**64)
N = 20
p = hash_functions.h_rolling('key', 20, p=53, m=2**64)
q = s % N
self.assertEqual(p, q)
def test_h_rolling_random(self):
key = ''
count = 0
for i in range(random.randint(1, 10)):
val = random.randint(97, 122)
key += chr(val)
count += val * 56**i
rand_N = random.randint(1, 1000)
assert hash_functions.h_rolling(key, rand_N) == count % 2**64 % rand_N
def test_h_rolling_works(self):
"""test h_rolling function returns expected result"""
N = random.randint(1, 1000) # chose rand file size
r = h.h_rolling('testkey', N) # test on known key
p = 53
m = 2**64
r2 = 0
for i in range(len('testkey')):
r2 += ord('testkey'[i]) * p**i
r2 = r2 % m
self.assertEqual(r, r2 % N)
def testRollingHashOutput(self):
testkey = "abc"
akI = [97, 98, 99]
p = 53
m = 2**64
n = 100
sum_test = 0
for i in range(0, 3):
sum_test += akI[i] * p**i
sum_test = sum_test % m
self.assertEqual(sum_test % n, hf.h_rolling(testkey, n))
def test_quadratic_probe_rolling_collision(self):
for i in range(100):
test_length = rdm.randint(100, 1000)
test_value1 = rdm.randint(1, 1000)
test_value2 = rdm.randint(1, 1000)
test_value3 = rdm.randint(1, 1000)
test_key = 'teststring'
test_table = ht.QuadraticProbe(test_length, hf.h_rolling)
test_table.add(test_key, test_value1)
test_table.add(test_key, test_value2)
test_table.add(test_key, test_value3)
self.assertEqual(test_value1, test_table.search(test_key))
self.assertEqual(
(test_key, test_value2),
test_table.T[(hf.h_rolling(test_key, test_length) + 1) %
test_length])
self.assertEqual(
(test_key, test_value3),
test_table.T[(hf.h_rolling(test_key, test_length) + 4) %
test_length])
def test_chained_hash_rolling_collision(self):
for i in range(100):
test_length = rdm.randint(2, 1000)
test_value1 = rdm.randint(1, 1000)
test_value2 = rdm.randint(1, 1000)
test_key = 'teststring'
test_table = ht.ChainedHash(test_length, hf.h_rolling)
test_table.add(test_key, test_value1)
test_table.add(test_key, test_value2)
self.assertEqual(test_value1, test_table.search(test_key))
self.assertEqual((test_key, test_value2),
test_table.T[hf.h_rolling(test_key,
test_length)][1])
def test_h_rolling_random_str(self):
for test in range(0, 1000):
randstr = ""
randlen = random.randint(1, 20)
randn = random.randint(1, 100)
s = 0
for i in range(randlen):
randchar = random.randint(32, 126)
randstr += chr(randchar)
s += randchar * 53**i
s = s % 2**64
self.assertEqual(s % randn, hf.h_rolling(randstr, randn))
def test_quadratic_probe_rolling_variable_add_search(self):
for i in range(100):
test_length = rdm.randint(1, 100)
letters = string.ascii_lowercase + string.ascii_uppercase
test_value = rdm.randint
test_key = ''
for j in range(rdm.randint(1, 100)):
letter = rdm.choice(letters)
test_key += letter
test_table = ht.QuadraticProbe(test_length, hf.h_rolling)
test_table.add(test_key, test_value)
self.assertEqual((test_key, test_value),
test_table.T[hf.h_rolling(test_key, test_length)])
self.assertEqual(test_value, test_table.search(test_key))
def test_rolling(self):
letters = string.ascii_lowercase + string.ascii_uppercase
for i in range(100):
sum_ = 0
p = 53
m = 2**64
test_length = rdm.randint(1, 100)
test_key = ''
for j in range(rdm.randint(1, 100)):
letter = rdm.choice(letters)
test_key += letter
for k in range(len(test_key)):
sum_ = 0
for i in range(len(test_key)):
sum_ += ord(test_key[i]) * p**i
sum_ = sum_ % m
r = sum_ % test_length
self.assertEqual(hash_functions.h_rolling(test_key, test_length),
r)
def test_rolling_null(self):
self.assertRaises(TypeError, lambda: hash_functions.h_rolling())
def test_rolling_key_none(self):
self.assertEqual(hash_functions.h_rolling(None, 5), None)
def test_rolling_N_none(self):
self.assertEqual(hash_functions.h_rolling('hello', None), None)
def test_rolling_neg_table(self):
self.assertEqual(hash_functions.h_rolling('string', -42), None)
def test_hash_random_function_key_int(self):
with self.assertRaises(TypeError):
hf.h_rolling(50, 50)
def test_hash_rolling_one_word_large(self):
r = hf.h_rolling('cyclistic', 5000)
self.assertEqual(r, 3339)
def test_rolling_key_not_string(self):
key = 17
N = 20
self.assertRaises(TypeError, hash_functions.h_rolling(key, N))
def test_hash_rolling_one_word_small(self):
r = hf.h_rolling('cyclistic', 50)
self.assertEqual(r, 39)
def test_h_rolling_none_string(self):
with self.assertRaises(ValueError):
hf.h_rolling(None, random.randint(1, 100))
def test_hash_rolling_none_input(self):
with self.assertRaises(TypeError):
hf.h_rolling(None, 50)
def test_h_rolling_integer(self):
self.assertEqual(hf.h_rolling('13', 100), 30)
if __name__ == '__main__':
file_name = sys.argv[1]
f = open(file_name, 'r')
word_list = []
for l in f:
word_list.append(l.rstrip())
f.close()
N = len(word_list) * 1.3
hash_values = []
if sys.argv[2] == 'h_rolling':
for word in word_list:
hash_values.append(hash_functions.h_rolling(word, N))
elif sys.argv[2] == 'h_ascii':
for word in word_list:
hash_values.append(hash_functions.h_ascii(word, N))
elif sys.argv[2] == 'h_python':
for word in word_list:
hash_values.append(hash_functions.h_python(word, N))
else:
print('Invalid hash function called.')
sys.exit
out_file = sys.argv[3]
x_label = sys.argv[4]
y_label = sys.argv[5]
title = sys.argv[6]
def test_rolling_zero_table(self):
self.assertEqual(hash_functions.h_rolling('string', 0), None)