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test_dawg.py
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test_dawg.py
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# -*- coding: utf-8 -*-
from __future__ import absolute_import, unicode_literals
import pickle
import tempfile
from io import BytesIO
import pytest
import dawg
def test_contains():
d = dawg.IntDAWG({'foo': 1, 'bar': 2, 'foobar': 3})
assert 'foo' in d
assert 'bar' in d
assert 'foobar' in d
assert 'fo' not in d
assert 'x' not in d
assert b'foo' in d
assert b'x' not in d
class TestDAWG(object):
def test_sorted_iterable(self):
sorted_data = ['bar', 'foo', 'foobar']
contents = "\n".join(sorted_data).encode('utf8')
with tempfile.NamedTemporaryFile() as f:
f.write(contents)
f.seek(0)
words = (line.strip() for line in f)
d = dawg.DAWG(words, input_is_sorted=True)
assert 'bar' in d
assert 'foo' in d
def test_no_segfaults_on_invalid_file(self):
d = dawg.DAWG()
fd, path = tempfile.mkstemp()
with open(path, 'w') as f:
f.write('foo')
with pytest.raises(IOError) as e:
d.load(path)
assert 'Invalid' in e.args[0]
with open(path, 'rb') as f:
with pytest.raises(IOError) as e:
d.read(f)
assert 'Invalid' in e.args[0]
def test_no_segfaults_after_wrong_stream(self):
d = dawg.DAWG()
wrong_path = tempfile.mktemp() # file doesn't exists
with pytest.raises(IOError):
d.load(wrong_path)
assert 'random-key' not in d # there is possible segfault
def test_build_errors(self):
with pytest.raises(dawg.Error):
data = [b'foo\x00bar', b'bar']
dawg.DAWG(data)
def test_contains_with_null_bytes(self):
d = dawg.DAWG(['foo'])
assert b'foo' in d
assert b'foo\x00bar' not in d
class TestIntDAWG(object):
IntDAWG = dawg.IntDAWG
def dawg(self):
payload = {'foo': 1, 'bar': 5, 'foobar': 3}
d = self.IntDAWG(payload)
return payload, d
def test_getitem(self):
payload, d = self.dawg()
for key in payload:
assert d[key] == payload[key]
with pytest.raises(KeyError):
d['fo']
def test_dumps_loads(self):
payload, d = self.dawg()
data = d.tobytes()
d2 = self.IntDAWG()
d2.frombytes(data)
for key, value in payload.items():
assert key in d2
assert d2[key] == value
def test_dump_load(self):
payload, _ = self.dawg()
buf = BytesIO()
self.IntDAWG(payload).write(buf)
buf.seek(0)
d = self.IntDAWG()
d.read(buf)
for key, value in payload.items():
assert key in d
assert d[key] == value
def test_pickling(self):
payload, d = self.dawg()
data = pickle.dumps(d)
d2 = pickle.loads(data)
for key, value in payload.items():
assert key in d2
assert d[key] == value
def test_int_value_ranges(self):
for val in [0, 5, 2**16-1, 2**31-1]:
d = self.IntDAWG({'f': val})
assert d['f'] == val
with pytest.raises(ValueError):
self.IntDAWG({'f': -1})
with pytest.raises(OverflowError):
self.IntDAWG({'f': 2**32-1})
class TestIntCompletionDAWG(TestIntDAWG):
IntDAWG = dawg.IntCompletionDAWG # checks that all tests for IntDAWG pass
class TestCompletionDAWG(object):
keys = ['f', 'bar', 'foo', 'foobar']
def dawg(self):
return dawg.CompletionDAWG(self.keys)
def empty_dawg(self):
return dawg.CompletionDAWG()
def test_contains(self):
d = self.dawg()
for key in self.keys:
assert key in d
def test_keys(self):
d = self.dawg()
assert d.keys() == sorted(self.keys)
def test_iterkeys(self):
d = self.dawg()
assert list(d.iterkeys()) == sorted(self.keys)
assert list(d.iterkeys()) == d.keys()
def test_prefixes(self):
d = self.dawg()
assert d.prefixes("foobarz") == ["f", "foo", "foobar"]
assert d.prefixes("x") == []
assert d.prefixes("bar") == ["bar"]
def test_iterprefixes(self):
d = self.dawg()
assert list(d.iterprefixes("foobarz")) == d.prefixes("foobarz")
assert list(d.iterprefixes("x")) == d.prefixes("x")
assert list(d.iterprefixes("bar")) == d.prefixes("bar")
def test_completion(self):
d = self.dawg()
assert d.keys('z') == []
assert d.keys('b') == ['bar']
assert d.keys('foo') == ['foo', 'foobar']
def test_has_keys_with_prefix(self):
assert self.empty_dawg().has_keys_with_prefix('') == False
d = self.dawg()
assert d.has_keys_with_prefix('') == True
assert d.has_keys_with_prefix('b') == True
assert d.has_keys_with_prefix('fo') == True
assert d.has_keys_with_prefix('bo') == False
def test_completion_dawg_saveload(self):
buf = BytesIO()
self.dawg().write(buf)
buf.seek(0)
d = self.empty_dawg()
d.read(buf)
for key in self.keys:
assert key in d
assert d.keys('foo') == ['foo', 'foobar']
assert d.keys('b') == ['bar']
assert d.keys('z') == []
def test_no_segfaults_on_invalid_file(self):
d = self.dawg()
fd, path = tempfile.mkstemp()
with open(path, 'w') as f:
f.write('foo')
with pytest.raises(IOError) as e:
d.load(path)
assert "can't load _dawg.Dictionary" in e.args[0]
def test_no_segfaults_on_empty_dawg(self):
d = dawg.CompletionDAWG([])
assert d.keys() == []
class TestIntCompletionDAWGComplete(TestCompletionDAWG):
keys = ['f', 'bar', 'foo', 'foobar']
def dawg(self):
return dawg.IntCompletionDAWG((k, len(k)) for k in self.keys)
def empty_dawg(self):
return dawg.IntCompletionDAWG()
def test_no_segfaults_on_empty_dawg(self):
d = dawg.IntCompletionDAWG([])
assert d.keys() == []
def test_items(self):
d = self.dawg()
items = d.items()
assert isinstance(items, list)
for key, value in items:
assert len(key) == value
def test_iteritems(self):
d = self.dawg()
for key, value in d.iteritems():
assert len(key) == value
def test_items_prefix(self):
d = self.dawg()
assert d.items('fo') == [('foo', 3), ('foobar', 6)]