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# encoding: utf-8
from __future__ import with_statement
import random
from whoosh.compat import b, xrange, iteritems
from whoosh.filedb.filestore import RamStorage
from whoosh.filedb.filetables import HashReader, HashWriter
from whoosh.filedb.filetables import OrderedHashWriter, OrderedHashReader
from whoosh.util.testing import TempStorage
def test_hash_single():
st = RamStorage()
hw = HashWriter(st.create_file("test.hsh"))
hw.add(b("alfa"), b("bravo"))
hw.close()
hr = HashReader.open(st, "test.hsh")
assert hr.get(b("alfa")) == b("bravo")
assert hr.get(b("foo")) is None
def test_hash():
with TempStorage("hash") as st:
hwf = st.create_file("test.hsh")
hw = HashWriter(hwf)
hw.add(b("foo"), b("bar"))
hw.add(b("glonk"), b("baz"))
hw.close()
hr = HashReader.open(st, "test.hsh")
assert hr.get(b("foo")) == b("bar")
assert hr.get(b("baz")) is None
hr.close()
def test_hash_extras():
st = RamStorage()
hw = HashWriter(st.create_file("test.hsh"))
hw.extras["test"] = 100
hw.add(b("foo"), b("bar"))
hw.add(b("glonk"), b("baz"))
hw.close()
hr = HashReader.open(st, "test.hsh")
assert hr.extras["test"] == 100
assert hr.get(b("foo")) == b("bar")
assert hr.get(b("baz")) is None
hr.close()
def test_hash_contents():
samp = [('alfa', 'bravo'), ('charlie', 'delta'), ('echo', 'foxtrot'),
('golf', 'hotel'), ('india', 'juliet'), ('kilo', 'lima'),
('mike', 'november'), ('oskar', 'papa'), ('quebec', 'romeo'),
('sierra', 'tango'), ('ultra', 'victor'), ('whiskey', 'xray'),
]
# Convert to bytes
samp = set((b(k), b(v)) for k, v in samp)
with TempStorage("hashcontents") as st:
hw = HashWriter(st.create_file("test.hsh"))
hw.add_all(samp)
hw.close()
hr = HashReader.open(st, "test.hsh")
probes = list(samp)
random.shuffle(probes)
for key, value in probes:
assert hr[key] == value
assert set(hr.keys()) == set([k for k, v in samp])
assert set(hr.values()) == set([v for k, v in samp])
assert set(hr.items()) == samp
hr.close()
def test_random_hash():
from string import ascii_letters as domain
times = 1000
minlen = 1
maxlen = len(domain)
def randstring():
s = "".join(random.sample(domain, random.randint(minlen, maxlen)))
return b(s)
with TempStorage("randomhash") as st:
samp = dict((randstring(), randstring()) for _ in xrange(times))
hw = HashWriter(st.create_file("test.hsh"))
for k, v in iteritems(samp):
hw.add(k, v)
hw.close()
keys = list(samp.keys())
random.shuffle(keys)
hr = HashReader.open(st, "test.hsh")
for k in keys:
assert hr[k] == samp[k]
hr.close()
def test_random_access():
times = 1000
with TempStorage("orderedhash") as st:
hw = HashWriter(st.create_file("test.hsh"))
hw.add_all((b("%08x" % x), b(str(x))) for x in xrange(times))
hw.close()
keys = list(range(times))
random.shuffle(keys)
hr = HashReader.open(st, "test.hsh")
for x in keys:
assert hr[b("%08x" % x)] == b(str(x))
hr.close()
def test_ordered_closest():
keys = ['alfa', 'bravo', 'charlie', 'delta', 'echo', 'foxtrot', 'golf',
'hotel', 'india', 'juliet', 'kilo', 'lima', 'mike', 'november']
# Make into bytes for Python 3
keys = [b(k) for k in keys]
values = [str(len(k)).encode("ascii") for k in keys]
with TempStorage("orderedclosest") as st:
hw = OrderedHashWriter(st.create_file("test.hsh"))
hw.add_all(zip(keys, values))
hw.close()
hr = OrderedHashReader.open(st, "test.hsh")
ck = hr.closest_key
assert ck(b('')) == b('alfa')
assert ck(b(' ')) == b('alfa')
assert ck(b('alfa')) == b('alfa')
assert ck(b('bravot')) == b('charlie')
assert ck(b('charlie')) == b('charlie')
assert ck(b('kiloton')) == b('lima')
assert ck(b('oskar')) is None
assert list(hr.keys()) == keys
assert list(hr.values()) == values
assert list(hr.keys_from(b('f'))) == keys[5:]
hr.close()
def test_extras():
st = RamStorage()
hw = HashWriter(st.create_file("test"))
hw.extras["test"] = 100
hw.extras["blah"] = "foo"
hw.close()
hr = HashReader(st.open_file("test"), st.file_length("test"))
assert hr.extras["test"] == 100
assert hr.extras["blah"] == "foo"
hr.close()
hw = OrderedHashWriter(st.create_file("test"))
hw.extras["test"] = 100
hw.extras["blah"] = "foo"
hw.close()
hr = HashReader(st.open_file("test"), st.file_length("test"))
assert hr.extras["test"] == 100
assert hr.extras["blah"] == "foo"
hr.close()
hr = OrderedHashReader(st.open_file("test"), st.file_length("test"))
assert hr.extras["test"] == 100
assert hr.extras["blah"] == "foo"
hr.close()
def test_checksum_file():
from whoosh.filedb.structfile import ChecksumFile
from zlib import crc32
def wr(f):
f.write(b("Testing"))
f.write_int(-100)
f.write_varint(10395)
f.write_string(b("Hello"))
f.write_ushort(32959)
st = RamStorage()
# Write a file normally
f = st.create_file("control")
wr(f)
f.close()
# Checksum the contents
f = st.open_file("control")
target = crc32(f.read()) & 0xffffffff
f.close()
# Write a file with checksumming
f = st.create_file("test")
cf = ChecksumFile(f)
wr(cf)
assert cf.checksum() == target
f.close()
# Read the file with checksumming
f = st.open_file("test")
cf = ChecksumFile(f)
assert cf.read(7) == b("Testing")
assert cf.read_int() == -100
assert cf.read_varint() == 10395
assert cf.read_string() == b("Hello")
assert cf.read_ushort() == 32959
assert cf.checksum() == target
cf.close()
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