def test_create_new() -> None:
data = Bytes(5, b'\x11\x22\x33\x44\x55')
bytes_t = typeof(data)
assert bytes_t.length() == 5
assert sizeof(bytes_t) == 5
assert data.length() == 5
assert sizeof(data) == 5
assert len(data) == 5
def test_typechecks_type_another() -> None:
bytes4_t = typeof(Bytes(4))
bytes8_t = typeof(Bytes(8))
bytes4_v = Bytes(4, b'1234')
assert not isinstance(bytes4_t, bytes8_t)
assert not issubclass(bytes4_t, bytes8_t)
assert not isinstance(bytes4_v, bytes8_t)
with raises(TypeError):
issubclass(bytes4_v, bytes8_t) # type: ignore
def test_eq() -> None:
bytes16 = typeof(Bytes(16))
bytes8 = typeof(Bytes(8))
bytes16_clone = clone_type(bytes16, name='bytes16')
assert bytes16 == bytes16 # pylint: disable=comparison-with-itself
assert bytes16 != bytes8
assert bytes16 == bytes16_clone
assert bytes16 != UInt16
assert bytes16 != Bytes
assert bytes16 != bytes
def test_typechecks_type() -> None:
bytes_t = typeof(Bytes(4))
bytes_v = Bytes(4, b'1234')
assert not isinstance(Bytes, bytes_t)
assert not issubclass(Bytes, bytes_t)
assert not isinstance(bytes_t, bytes_t)
assert issubclass(bytes_t, bytes_t)
assert isinstance(bytes_v, bytes_t)
with raises(TypeError):
issubclass(bytes_v, bytes_t) # type: ignore
assert not isinstance(b'string', bytes_t)
with raises(TypeError):
issubclass(b'string', bytes_t) # type: ignore
def test_member_change_another() -> None:
class Container(Struct):
field_b: Bytes[Literal[5]]
field_u: UInt32
inst = Container()
another = Bytes(5, b'\x01\x23\x45\x67\x89')
data = inst.field_b
inst.field_b = another
assert bytes(data) == b'\x01\x23\x45\x67\x89'
def test_init_bad_3() -> None:
with raises(ValueError):
_ = Bytes(5, b'too_many_bytes')
def test_init_bad_2() -> None:
with raises(TypeError):
_ = Bytes(5, 'Bad value') # type: ignore
def test_init_another_2() -> None:
data1 = Bytes(5, b'\x11\x22\x33\x44\x55')
data2 = Bytes(5, data1)
assert bytes(data2) == b'\x11\x22\x33\x44\x55'
def test_init_another_1() -> None:
bytes_t = Bytes[Literal[5]]
data1 = Bytes(5, b'\x11\x22\x33\x44\x55')
data2 = bytes_t(data1)
assert bytes(data2) == b'\x11\x22\x33\x44\x55'
def test_init_short_2() -> None:
data = Bytes(5, b'\x11\x22\x33')
assert bytes(data) == b'\x11\x22\x33\x00\x00'
def test_setitem() -> None:
data = Bytes(6, b'abcdef')
data[2] = b'X'
assert bytes(data) == b'abXdef'
class Container(Struct):
field = Bytes(5)
def test_setitem_bad_len() -> None:
data = Bytes(6, b'abcdef')
with raises(ValueError):
data[2] = b'XY'
def test_setitem_bad_index() -> None:
data = Bytes(6, b'abcdef')
with raises(IndexError):
data[6] = b'X'
def test_init_bad_4() -> None:
with raises(TypeError):
_ = Bytes('5', b'\x11\x22\x33\x44\x55') # type: ignore
def test_name_2() -> None:
data = Bytes(5, b'abcde')
bytes_t = typeof(data)
assert type_name(bytes_t) == 'char[5]'
assert type_name(data) == 'char[5]'
def test_getitem() -> None:
data = Bytes(6, b'abcdef')
assert data[2] == b'c'