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test_ricecode.py
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test_ricecode.py
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# -*- coding: utf-8 -*-
"""
Tests for ricecode.py
"""
import unittest
from zope.index.text.ricecode import encode
from zope.index.text.ricecode import encode_deltas
from zope.index.text.ricecode import decode_deltas
from zope.index.text.ricecode import pickle_efficiency
from zope.index.text.ricecode import RiceCode
class TestRiceCode(unittest.TestCase):
def test_random(self):
import random
for size in [10, 20, 50, 100, 200]:
l = [random.randint(1, size) for i in range(50)]
c = encode(random.randint(1, 16), l)
self.assertEqual(c.tolist(), l)
for size in [10, 20, 50, 100, 200]:
l = list(range(random.randint(1, size), size + random.randint(1, size)))
l_0, deltas = encode_deltas(l)
l2 = decode_deltas(l_0, deltas)
self.assertEqual(l, l2)
def test_encode_deltas_one_element(self):
self.assertEqual(('foo', []),
encode_deltas(['foo']))
def test_pickle_efficiency(self):
# This is random data so it's hard to say what wins
# and what loses.
results = pickle_efficiency(sizes=(10, 20), elt_ranges=(10, 20))
self.assertEqual(3, len(results))
def test_bit_range(self):
with self.assertRaises(ValueError):
RiceCode(-1)
with self.assertRaises(ValueError):
RiceCode(17)
def test_length(self):
code = RiceCode(6)
self.assertEqual(0, len(code))
self.assertEqual(0, len(code.bits))
code.append(1)
self.assertEqual(1, len(code))
self.assertEqual(7, len(code.bits))
def test_append_invalid(self):
with self.assertRaises(ValueError):
RiceCode(6).append(0)
def test_pickle(self):
import pickle
code = RiceCode(6)
code.append(1)
code2 = pickle.loads(pickle.dumps(code))
self.assertEqual(code.m, code2.m)
self.assertEqual(code.tostring(), code2.tostring())
# But length is not preserved
self.assertEqual(1, len(code))
self.assertEqual(0, len(code2))