from twnet_parser.packet import \
    ChunkHeaderParser
from twnet_parser.chunk_header import \
    ChunkHeader

def test_chunk_header_unpack_bogus_vital() -> None:
    # this is a non sense header
    # but the values are verified with the C++
    # implementation
    parser = ChunkHeaderParser()
    header: ChunkHeader = parser.parse_header6(b'\x40\x10\x0a')

    assert header.flags.resend is False
    assert header.flags.vital is True

    assert header.size == 0
    assert header.seq == 74

def test_chunk_header_unpack_vital_seq38() -> None:
    # this is a non sense header
    # but the values are verified with the C++
    # implementation
    parser = ChunkHeaderParser()
    header: ChunkHeader = parser.parse_header6(b'\x40\x02\x26')

    assert header.flags.resend is False
    assert header.flags.vital is True

    assert header.size == 2
    assert header.seq == 38

def test_chunk_header_unpack_bogus_no_flags_size107() -> None:
    # this is a non sense header
    # but the values are verified with the C++
    # implementation
    parser = ChunkHeaderParser()
    header: ChunkHeader = parser.parse_header6(b'\x06\x0b')

    assert header.flags.resend is False
    assert header.flags.vital is False

    assert header.size == 107
    assert header.seq == -1

def test_chunk_header_unpack_bogus_no_flags_size27() -> None:
    # this is a non sense header
    # but the values are verified with the C++
    # implementation
    parser = ChunkHeaderParser()
    header: ChunkHeader = parser.parse_header6(b'\x01\x0b')

    assert header.flags.resend is False
    assert header.flags.vital is False

    assert header.size == 27
    assert header.seq == -1

def test_chunk_header_all_set() -> None:
    # this is a non sense header
    # but the values are verified with the C++
    # implementation
    parser = ChunkHeaderParser()
    header: ChunkHeader = parser.parse_header6(b'\xff\xff\xff')

    assert header.flags.resend is True
    assert header.flags.vital is True

    assert header.size == 1023
    assert header.seq == 1023