390 lines
11 KiB
Python
390 lines
11 KiB
Python
from typing import List, Union, Type, Optional
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import pytest
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from sampy.raknet.bitstream import Bitstream, get_bit_length
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@pytest.mark.parametrize("value", [
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b"",
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b"A",
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b"AB",
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b"\xFF\x00\xAA\x55",
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])
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def test_from_bytes(value: bytes):
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bitstream = Bitstream.from_bytes(value)
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assert len(bitstream) == (len(value) << 3)
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assert bytes(bitstream) == value
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@pytest.mark.parametrize("value,length,expected", [
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(0b0, 0, None),
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(0b1, 1, None),
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(0b0, 1, None),
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(0b1011, 4, None),
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(0b10111011, 8, None),
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(0b10111011, 7, 0b0111011), # -> 0b0111011
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])
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def test_from_int(value: int, length: int, expected: int):
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bitstream = Bitstream.from_int(value, length)
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assert len(bitstream) == length
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assert len(bytes(bitstream)) == ((length + 7) >> 3)
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assert bitstream.bits == [bool(value & (1 << i)) for i in range(length-1, -1, -1)]
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if expected is not None:
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expected_bitstream = Bitstream.from_int(expected, length)
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assert bitstream.bits == expected_bitstream.bits
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assert bytes(bitstream) == bytes(expected_bitstream)
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@pytest.mark.parametrize("values", [
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[True, False, False, True, True],
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[[True], [False, True], [False, False]],
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[b"a", b"bc"],
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["aa", "b"],
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[Bitstream.from_bytes(b"A"), Bitstream.from_int(0b1011, 4), Bitstream.from_bytes(b"B")],
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[True, b"A", "B", [False, True], Bitstream.from_int(0b10110, 5), False],
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])
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def test_init(values: List[Union[bool, List[bool], bytes, str, Bitstream]]):
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bitstream = Bitstream(*values)
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bitstream.seek(0)
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for item in values:
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bit_length = get_bit_length(item)
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if type(item) is bool:
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item = [item]
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read_type = bool if type(item) is list else type(item)
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value = bitstream.read(read_type, bit_length)
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assert value == item
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def test_getitem():
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sample_values = [True, False, False, True, False, True, True, True, True, False]
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for length in range(1, len(sample_values)):
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values = sample_values[:length]
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bitstream = Bitstream(values)
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for i in range(length):
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assert bitstream[i] == values[i]
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assert bitstream[-i - 1] == values[-i - 1] # For inverse lookup
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def test_getitem_index_error():
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bitstream = Bitstream(True)
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with pytest.raises(IndexError):
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bitstream[1]
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with pytest.raises(IndexError):
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bitstream[-2] # Inverse IndexError
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@pytest.mark.parametrize("value", [
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True,
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[True, True],
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b"A",
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"B",
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Bitstream(True, b"C"),
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])
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def test_setitem(value: Union[bool, List[bool], bytes, str, Bitstream]):
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bit_length = get_bit_length(value)
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read_type = bool if type(value) is list else type(value)
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for length in range(10):
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for i in range(length - bit_length + 1):
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bitstream = Bitstream([False] * length)
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bitstream[i] = value
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assert bitstream.read(read_type, bit_length, i) == (value if type(value) is not bool else [value])
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assert len(bitstream) == length
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@pytest.mark.parametrize("value,equals,not_equals", [
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(
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[],
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[[]],
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[[True], [False]]
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),
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(
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True,
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[[True]],
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[[False], [True, False], b"A"]
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),
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(
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[True, False],
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[[True, False]],
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[[False], [False, False], b"A"]
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),
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(
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b"A",
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[b"A", "A", Bitstream.from_bytes(b"A"), Bitstream.from_bytes(b"A").bits],
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[[], [False], b"B", "B", Bitstream.from_bytes(b"B"), Bitstream.from_bytes(b"B").bits]
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),
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(
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"B",
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[b"B", "B", Bitstream.from_bytes(b"B"), Bitstream.from_bytes(b"B").bits],
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[[], [False], b"A", "A", Bitstream.from_bytes(b"A"), Bitstream.from_bytes(b"A").bits]
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),
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(
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b"ABC",
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[b"ABC"],
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[[], [False], b"A"]
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),
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])
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def test_eq(
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value: Union[bool, List[bool], bytes, str, Bitstream],
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equals: List[Union[bool, List[bool], bytes, str, Bitstream]],
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not_equals: List[Union[bool, List[bool], bytes, str, Bitstream]]):
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bitstream = Bitstream(value)
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for equal in equals:
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assert bitstream == equal
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for not_equal in not_equals:
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assert bitstream != not_equal
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@pytest.mark.parametrize("values,number,expected", [
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([], 2, []),
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([True, False], 2, [True, False, True, False]),
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(b"A", 2, b"AA"),
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([False], 3, [False, False, False]),
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])
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def test_mul(
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values: Union[bool, List[bool], bytes, str, Bitstream],
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number: int,
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expected: Union[List[bool], bytes, str, Bitstream]):
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bitstream = Bitstream(values)
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assert (bitstream * number) == expected
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assert bitstream == values
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bitstream *= number
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assert bitstream == expected
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@pytest.mark.parametrize("init_values,add_value,expected", [
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([], True, [True]),
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([True, False], False, [True, False, False]),
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(b"A", b"B", b"AB"),
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])
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def test_add(
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init_values: Union[bool, List[bool], bytes, str, Bitstream],
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add_value: Union[bool, List[bool], bytes, str, Bitstream],
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expected: Union[List[bool], bytes, str, Bitstream]):
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bitstream = Bitstream(init_values)
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assert (bitstream + add_value) == expected
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assert len(bitstream) == get_bit_length(init_values)
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bitstream += add_value
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assert bitstream == expected
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@pytest.mark.parametrize("init_values", [
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[],
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[True, False],
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[b"A"],
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[True, b"B"],
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])
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def test_iter(init_values: List[Union[bool, List[bool], bytes, str, Bitstream]]):
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bitstream = Bitstream(*init_values)
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assert len(iter(bitstream)) == len(bitstream)
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for index, bit in enumerate(bitstream):
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assert bit == bitstream[index]
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@pytest.mark.parametrize("init_values,expected", [
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([], b""),
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([b"A"], b"A"),
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([False], b"\x00"),
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([[False] * 6, True], b"\x02"),
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([[False] * 7, True], b"\x01"),
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])
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def test_bytes(
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init_values: List[Union[bool, List[bool], bytes, str, Bitstream]],
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expected: bytes):
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assert bytes(Bitstream(*init_values)) == expected
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@pytest.mark.parametrize("init_values,expected", [
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([], []),
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([b"\x01"], [False] * 7 + [True]),
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([False], [False]),
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([False] * 6 + [True], [False] * 6 + [True]),
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([False] * 7 + [True], [False] * 7 + [True]),
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])
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def test_bits(
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init_values: List[Union[bool, List[bool], bytes, str, Bitstream]],
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expected: List[bool]):
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assert Bitstream(*init_values).bits == expected
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def test_copy():
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bitstream = Bitstream(True, False)
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bitstream_copy = bitstream.copy()
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assert bitstream == bitstream_copy
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assert id(bitstream) != id(bitstream.copy)
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@pytest.mark.parametrize("lst", [
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[False] * 10,
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[True] * 10,
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[True, False] * 5,
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[False, True] * 5,
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])
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def test_append(lst: List[bool]):
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bitstream = Bitstream()
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for i in range(len(lst)):
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bitstream.append(lst[i])
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assert bitstream[i] == lst[i]
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assert len(bitstream) == (i + 1)
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@pytest.mark.parametrize("extend_value", [
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[True, False, True],
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b"A",
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"B",
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Bitstream(True, b"C"),
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])
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def test_extend(extend_value: Union[List[bool], bytes, str, Bitstream]):
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for i in range(10):
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bitstream = Bitstream([False] * i)
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bitstream.extend(extend_value)
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value = bitstream.read(bool if type(extend_value) is list else type(extend_value), get_bit_length(extend_value), i)
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assert value == extend_value
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def test_extend_error():
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bitstream = Bitstream()
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with pytest.raises(TypeError):
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bitstream.extend(True)
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def test_clear():
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bitstream = Bitstream(b"A", [True, False, False, True])
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bitstream._offset = 3
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bitstream.clear()
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assert len(bitstream) == 0
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assert len(bytes(bitstream)) == 0
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assert bitstream._offset == 0
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@pytest.mark.parametrize("lst", [
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[False] * 10,
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[True] * 10,
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[True, False] * 5,
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[False, True] * 5,
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])
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def test_pop(lst: List[bool]):
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bitstream = Bitstream(lst)
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for i in range(len(bitstream)):
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assert bitstream.pop() == lst[-i - 1]
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with pytest.raises(IndexError):
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assert bitstream.pop()
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def test_read():
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bitstream = Bitstream(True, b"A", False, True, False)
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assert bitstream.read(bool, 1) == [True]
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assert bitstream.read(bytes, 8) == b"A"
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assert bitstream.read(int, 3) == 2
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bitstream.seek(0)
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assert bitstream.read(Bitstream, len(bitstream) - 1) == Bitstream(True, b"A", False, True)
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@pytest.mark.parametrize("bitstream,read_type,bit_length,bit_index,expected", [
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(
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Bitstream(True, b"A", False, True, False),
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bool, 1, 0,
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[True]
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),
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(
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Bitstream(True, b"A", False, True, False),
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bool, 3, 8 + 1,
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[False, True, False]
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),
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(
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Bitstream(True, b"A", False, True, False),
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bytes, 8, 1,
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b"A"
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),
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(
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Bitstream(True, b"A", False, True, False),
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str, 8, 1,
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"A"
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),
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(
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Bitstream(True, b"A", False, True, False),
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Bitstream, 1 + 8 + 3, 0,
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Bitstream(True, b"A", False, True, False)
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),
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(
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Bitstream(True, b"A", False, True, False),
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int, 3, 1 + 8,
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2
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),
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])
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def test_read_index(
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bitstream: Bitstream,
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read_type: Type[Union[bool, bytes, str, Bitstream, int]],
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bit_length: int,
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bit_index: Optional[int],
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expected: Union[List[bool], bytes, str, Bitstream, int]):
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value = bitstream.read(read_type, bit_length, bit_index)
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if read_type is bool:
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assert type(value) == list
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else:
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assert type(value) == read_type
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assert value == expected
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def test_read_error():
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bitstream = Bitstream(True, b"A", False, True, False)
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with pytest.raises(IndexError):
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bitstream.read(bool, 1, len(bitstream))
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with pytest.raises(IndexError):
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bitstream.read(bool, 1, -1)
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with pytest.raises(TypeError):
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bitstream.read(list, 1, 0)
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@pytest.mark.parametrize("bitstream,value,bit_index,current_offset", [
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(Bitstream(), True, None, None),
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(Bitstream(), b"A", None, None),
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(Bitstream(), True, 0, None),
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(Bitstream(), True, 3, None),
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(Bitstream(), True, 7, None),
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(Bitstream(), True, 8, None),
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(Bitstream(False), True, None, None),
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(Bitstream(False), True, 0, None),
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(Bitstream(False), True, 0, 0),
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(Bitstream(False), True, None, 0),
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])
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def test_write(bitstream: Bitstream, value: Union[bool, List[bool], bytes, str, Bitstream], bit_index: Optional[int], current_offset: Optional[int]):
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if current_offset is not None:
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bitstream.seek(current_offset)
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bit_length = get_bit_length(value)
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bitstream.write(value, bit_index)
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if bit_index is None:
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bitstream.seek(-bit_length, 1)
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read_value = bitstream.read(bool if type(value) is list else type(value), bit_length)
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else:
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read_value = bitstream.read(bool if type(value) is list else type(value), bit_length, bit_index)
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assert read_value == ([value] if type(value) is bool else value)
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def test_seek():
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bitstream = Bitstream([True] * 8)
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bitstream.seek(4, 0)
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assert bitstream._offset == 4
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bitstream.seek(-1, 1)
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assert bitstream._offset == 3
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bitstream.seek(-1, 2)
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assert bitstream._offset == 7
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