169 lines
4.8 KiB
Python
169 lines
4.8 KiB
Python
from twnet_parser.packet import \
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ChunkHeaderParser
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from twnet_parser.chunk_header import \
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ChunkHeader
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from tests.helper import cmp_bytes_as_bin
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def test_chunk_header_unpack_vital1() -> None:
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parser = ChunkHeaderParser()
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header: ChunkHeader = parser.parse_header7(b'\x40\x10\x0a')
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assert header.flags.resend is False
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assert header.flags.vital is True
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assert header.size == 16
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assert header.seq == 10
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def test_chunk_header_pack_vital1() -> None:
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header: ChunkHeader = ChunkHeader()
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header.flags.resend = False
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header.flags.vital = True
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header.size = 16
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header.seq = 10
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assert bytes([0b01000000, 0b00010000, 0b00001010]) == b'\x40\x10\x0a'
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cmp_bytes_as_bin(header.pack(), b'\x40\x10\x0a')
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assert header.pack() == b'\x40\x10\x0a'
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def test_chunk_header_pack_resend() -> None:
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header: ChunkHeader = ChunkHeader()
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header.flags.resend = True
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header.flags.vital = False
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header.size = 16
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header.seq = 0
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assert bytes([0b10000000, 0b00010000]) == b'\x80\x10'
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cmp_bytes_as_bin(header.pack(), b'\x80\x10')
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assert header.pack() == b'\x80\x10'
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def test_chunk_header_pack_no_flags1() -> None:
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header: ChunkHeader = ChunkHeader()
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header.flags.resend = False
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header.flags.vital = False
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header.size = 16
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header.seq = 0
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assert bytes([0b00000000, 0b00010000]) == b'\x00\x10'
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cmp_bytes_as_bin(header.pack(), b'\x00\x10')
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assert header.pack() == b'\x00\x10'
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def test_chunk_header_pack_no_flags2() -> None:
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header: ChunkHeader = ChunkHeader()
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header.flags.resend = False
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header.flags.vital = False
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header.seq = 0
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header.size = 17
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assert bytes([0b00000000, 0b00010001]) == b'\x00\x11'
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cmp_bytes_as_bin(header.pack(), b'\x00\x11')
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assert header.pack() == b'\x00\x11'
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header.size = 18
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assert bytes([0b00000000, 0b00010010]) == b'\x00\x12'
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cmp_bytes_as_bin(header.pack(), b'\x00\x12')
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assert header.pack() == b'\x00\x12'
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header.size = 19
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assert bytes([0b00000000, 0b00010011]) == b'\x00\x13'
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cmp_bytes_as_bin(header.pack(), b'\x00\x13')
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assert header.pack() == b'\x00\x13'
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header.size = 20
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assert bytes([0b00000000, 0b00010100]) == b'\x00\x14'
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cmp_bytes_as_bin(header.pack(), b'\x00\x14')
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assert header.pack() == b'\x00\x14'
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header.size = 21
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assert bytes([0b00000000, 0b00010101]) == b'\x00\x15'
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cmp_bytes_as_bin(header.pack(), b'\x00\x15')
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assert header.pack() == b'\x00\x15'
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def test_chunk_header_pack_no_flags_max_size() -> None:
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header: ChunkHeader = ChunkHeader()
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header.flags.resend = False
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header.flags.vital = False
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header.seq = 0
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header.size = 4094
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#
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# from libtw2 docs
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# https://github.com/heinrich5991/libtw2/blob/7885c99974ee445ce13297b72ae3e7c6ea3b969d/doc/packet7.md
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#
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# chunk7_header_nonvital:
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# [ 1] flag_resend
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# [ 1] flag_vital
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# [ 6] <----------
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# [ 2] padding |-- size
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# [ 6] <----------
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#
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# FFss ssss PPss ssss
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assert bytes([0b0011_1111, 0b0011_1110]) == b'\x3f\x3e'
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cmp_bytes_as_bin(header.pack(), b'\x3f\x3e')
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assert header.pack() == b'\x3f\x3e'
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header.size = 4095
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#
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# from libtw2 docs
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# https://github.com/heinrich5991/libtw2/blob/7885c99974ee445ce13297b72ae3e7c6ea3b969d/doc/packet7.md
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#
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# chunk7_header_nonvital:
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# [ 1] flag_resend
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# [ 1] flag_vital
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# [ 6] <----------
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# [ 2] padding |-- size
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# [ 6] <----------
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#
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# FFss ssss PPss ssss
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assert bytes([0b0011_1111, 0b0011_1111]) == b'\x3f\x3f'
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cmp_bytes_as_bin(header.pack(), b'\x3f\x3f')
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assert header.pack() == b'\x3f\x3f'
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def test_chunk_header_pack_no_flags_out_of_bounds_size() -> None:
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header: ChunkHeader = ChunkHeader()
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header.flags.resend = False
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header.flags.vital = False
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header.seq = 0
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header.size = 4096
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#
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# from libtw2 docs
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# https://github.com/heinrich5991/libtw2/blob/7885c99974ee445ce13297b72ae3e7c6ea3b969d/doc/packet7.md
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#
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# chunk7_header_nonvital:
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# [ 1] flag_resend
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# [ 1] flag_vital
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# [ 6] <----------
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# [ 2] padding |-- size
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# [ 6] <----------
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#
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# FFss ssss PPss ssss
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assert bytes([0b0000_0000, 0b0000_0000]) == b'\x00\x00'
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# ^
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# does overflow to zero
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# should we error here instead?
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# TODO: https://gitlab.com/teeworlds-network/twnet_parser/-/issues/2
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cmp_bytes_as_bin(header.pack(), b'\x00\x00')
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assert header.pack() == b'\x00\x00'
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def test_chunk_header_unpack_vital2() -> None:
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parser = ChunkHeaderParser()
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header: ChunkHeader = parser.parse_header7(b'\x40\x10\x09')
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assert header.flags.resend is False
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assert header.flags.vital is True
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assert header.size == 16
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assert header.seq == 9
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