/usr/lib/python3/dist-packages/dbfread/test_field_parser.py is in python3-dbfread 2.0.7-2.
This file is owned by root:root, with mode 0o644.
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from decimal import Decimal
from pytest import raises
from .field_parser import FieldParser
class MockHeader(object):
dbversion = 0x02
class MockDBF(object):
def __init__(self):
self.header = MockHeader()
self.encoding = 'ascii'
self.char_decode_errors = 'strict'
class MockField(object):
def __init__(self, type='', **kwargs):
self.type = type
self.__dict__.update(kwargs)
class MockMemoFile(dict):
def __getitem__(self, index):
if index == 0:
return None
else:
return dict.__getitem__(self, index)
def make_field_parser(field_type, dbversion=0x02, memofile=None):
dbf = MockDBF()
dbf.header.dbversion = dbversion
parser = FieldParser(dbf, memofile)
field = MockField(field_type)
def parse(data):
return parser.parse(field, data)
return parse
def test_0():
parse = make_field_parser('0')
assert parse(b'\0') == b'\x00'
assert parse(b'\xaa\xff') == b'\xaa\xff'
def test_C():
parse = make_field_parser('C')
assert type(parse(b'test')) == type(u'')
def test_D():
parse = make_field_parser('D')
assert parse(b'00000000') is None
assert parse(b' ') is None
epoch = datetime.date(1970, 1, 1)
assert parse(b'19700101') == epoch
with raises(ValueError):
parse(b'NotIntgr')
def test_F():
parse = make_field_parser('F')
assert parse(b'') is None
assert parse(b' ') is None
assert parse(b'0') == 0
assert parse(b'1') == 1
assert parse(b'-1') == -1
assert parse(b'3.14') == 3.14
# In some files * is used for padding.
assert parse(b'0.01**') == 0.01
assert parse(b'******') is None
with raises(ValueError):
parse(b'jsdf')
# This also tests parse2B() (+)
def test_I():
parse = make_field_parser('I')
# Little endian unsigned integer.
assert parse(b'\x00\x00\x00\x00') == 0
assert parse(b'\x01\x00\x00\x00') == 1
assert parse(b'\xff\xff\xff\xff') == -1
def test_L():
parse = make_field_parser('L')
for char in b'TtYy':
assert parse(char) is True
for char in b'FfNn':
assert parse(char) is False
for char in b'? ':
assert parse(char) is None
# Some invalid values.
for char in b'!0':
with raises(ValueError):
parse(char)
# This also tests B, G and P.
def test_M():
parse = make_field_parser('M', memofile=MockMemoFile({1: b'test'}))
assert parse(b'\x01\x00\x00\x00') == u'test'
assert parse(b'1') == u'test'
assert parse(b'') is None
with raises(ValueError):
parse(b'NotInteger')
def test_B():
# In VisualFox the B field is a double precision floating point number.
parse = make_field_parser('B', dbversion=0x30)
assert isinstance(parse(b'01abcdef'), float)
assert parse(b'\0' * 8) == 0.0
# Data must be exactly 8 bytes.
with raises(Exception):
parse(b'')
# In other db versions it is a memo index.
parse = make_field_parser('B', dbversion=0x02,
memofile=MockMemoFile({1: b'test'}))
parse(b'1') == b'test'
parse(b'') is None
def test_N():
parse = make_field_parser('N')
assert parse(b'') is None
assert parse(b' ') is None
assert parse(b'1') == 1
assert parse(b'-99') == -99
assert parse(b'3.14') == 3.14
# In some files * is used for padding.
assert parse(b'0.01**') == 0.01
assert parse(b'******') is None
with raises(ValueError):
parse(b'okasd')
def test_O():
"""Test double field."""
parse = make_field_parser('O')
assert parse(b'\x00' * 8) == 0.0
assert parse(b'\x00\x00\x00\x00\x00\x00\xf0?') == 1.0
assert parse(b'\x00\x00\x00\x00\x00\x00Y\xc0') == -100
# This also tests parse40() (@)
def test_T():
parse = make_field_parser('T')
assert parse(b'') is None
assert parse(b' ') is None
# Todo: add more tests.
def test_Y():
parse = make_field_parser('Y')
assert parse(b'\1\0\0\0\0\0\0\0') == Decimal('0.0001')
assert parse(b'\xff\xff\xff\xff\xff\xff\xff\xff') == Decimal('-0.0001')
def test_hex_field():
class PlusFieldParser(FieldParser):
encoding = 'latin1'
def parse3F(self, field, data):
"""Parser for '?' field."""
return None
parser = PlusFieldParser(MockDBF())
field = MockField('?')
parser.parse(field, b'test')
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