def setUp(self):
data = b"abcdefghijklmnopqrstuvwxyz"
bytes_io = BytesIO(data)
self.bytes_io = bytes_io
self.isw = IStreamWrapper(bytes_io, len(data))
class IStreamWrapperTestCase(TestCase):
def setUp(self):
data = b"abcdefghijklmnopqrstuvwxyz"
bytes_io = BytesIO(data)
self.bytes_io = bytes_io
self.isw = IStreamWrapper(bytes_io, len(data))
# end def setUp
def test__init__(self):
ae = self.assertEqual
ae(self.isw.size, 26)
ae(self.isw._stream, self.bytes_io)
# end def test__init__
def test_seek(self):
ae = self.assertEqual
ar = self.assertRaises
isw = self.isw
ae(isw.seek(10, SEEK_SET), 10)
ae(isw._stream.tell(), 10)
ar(ValueError, isw.seek, -10, SEEK_SET)
isw.seek(3, SEEK_SET)
ae(isw.seek(5, SEEK_CUR), 8)
ae(isw._stream.tell(), 8)
ae(isw.seek(-2, SEEK_CUR), 6)
ae(isw._stream.tell(), 6)
ae(isw.seek(-3, SEEK_END), 23)
ae(isw._stream.tell(), 23)
ae(isw.seek(3, SEEK_END), 29)
ae(isw._stream.tell(), 29)
# end def test_seek
def test_tell(self):
ae = self.assertEqual
isw = self.isw
bytes_io = self.bytes_io
bytes_io.seek(0, SEEK_SET)
ae(isw.tell(), 0)
bytes_io.seek(2, SEEK_SET)
ae(isw.tell(), 2)
# end def test_tell
def test_read(self):
ae = self.assertEqual
self.isw.seek(0, SEEK_SET)
ae(self.isw.read(0), b"")
ae(self.isw.read(1), b"a")
ae(self.isw.read(2), b"bc")
ae(self.isw.read(), b"defghijklmnopqrstuvwxyz")
self.isw.seek(-3, SEEK_END)
ae(self.isw.read(5), b"xyz")
self.isw.seek(30, SEEK_SET)
ae(self.isw.read(), b"")
# end def test_read
def test_readall(self):
ae = self.assertEqual
self.isw.seek(0, SEEK_SET)
ae(self.isw.readall(), b"abcdefghijklmnopqrstuvwxyz")
self.isw.seek(3, SEEK_SET)
ae(self.isw.readall(), b"defghijklmnopqrstuvwxyz")
# end def test_readall
def test_readinto(self):
ae = self.assertEqual
isw = self.isw
barray0 = bytearray(5)
barray1 = bytearray(10)
barray2 = bytearray(26)
barray3 = bytearray(1)
isw.seek(-12, SEEK_END)
retval0 = isw.readinto(barray0)
retval1 = isw.readinto(barray1)
isw.seek(0, SEEK_SET)
retval2 = isw.readinto(barray2)
isw.seek(30, SEEK_SET)
retval3 = isw.readinto(barray3)
ae(retval0, 5)
ae(retval1, 7)
ae(retval2, 26)
ae(retval3, 0)
ae(barray0, b"opqrs")
ae(barray1, b"tuvwxyz\x00\x00\x00")
ae(barray2, b"abcdefghijklmnopqrstuvwxyz")
ae(barray3, b"\x00")