1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121

pub mod decoder;
pub mod encoder;

pub use decoder::decode;
pub use encoder::encode;

use re_chunk::TransportChunk;

#[derive(Clone, Copy, PartialEq, Eq, Hash, Default)]
pub struct MessageHeader(pub u8);

impl MessageHeader {
    pub const NO_DATA: Self = Self(1);
    pub const RECORD_BATCH: Self = Self(2);

    pub const SIZE_BYTES: usize = 1;
}

#[derive(Debug)]
pub enum TransportMessageV0 {
    NoData,
    RecordBatch(TransportChunk),
}

#[cfg(test)]
mod tests {
    use crate::{
        codec::wire::{decode, encode, TransportMessageV0},
        codec::CodecError,
    };
    use re_chunk::{Chunk, RowId};
    use re_log_types::{example_components::MyPoint, Timeline};
    use re_protos::common::v0::EncoderVersion;

    fn get_test_chunk() -> Chunk {
        let row_id1 = RowId::new();
        let row_id2 = RowId::new();

        let timepoint1 = [
            (Timeline::log_time(), 100),
            (Timeline::new_sequence("frame"), 1),
        ];
        let timepoint2 = [
            (Timeline::log_time(), 104),
            (Timeline::new_sequence("frame"), 1),
        ];

        let points1 = &[MyPoint::new(1.0, 1.0)];
        let points2 = &[MyPoint::new(2.0, 2.0)];

        Chunk::builder("mypoints".into())
            .with_component_batches(row_id1, timepoint1, [points1 as _])
            .with_component_batches(row_id2, timepoint2, [points2 as _])
            .build()
            .unwrap()
    }

    #[test]
    fn test_message_v0_no_data() {
        let msg = TransportMessageV0::NoData;
        let data = msg.to_bytes().unwrap();
        let decoded = TransportMessageV0::from_bytes(&data).unwrap();
        assert!(matches!(decoded, TransportMessageV0::NoData));
    }

    #[test]
    fn test_message_v0_record_batch() {
        let expected_chunk = get_test_chunk();

        let msg = TransportMessageV0::RecordBatch(expected_chunk.clone().to_transport().unwrap());
        let data = msg.to_bytes().unwrap();
        let decoded = TransportMessageV0::from_bytes(&data).unwrap();

        #[allow(clippy::match_wildcard_for_single_variants)]
        match decoded {
            TransportMessageV0::RecordBatch(transport) => {
                let decoded_chunk = Chunk::from_transport(&transport).unwrap();
                assert_eq!(expected_chunk, decoded_chunk);
            }
            _ => panic!("unexpected message type"),
        }
    }

    #[test]
    fn test_invalid_batch_data() {
        let data = vec![2, 3, 4]; // '1' is NO_DATA message header
        let decoded = TransportMessageV0::from_bytes(&data);

        assert!(matches!(
            decoded.err().unwrap(),
            CodecError::ArrowSerialization(_)
        ));
    }

    #[test]
    fn test_unknown_header() {
        let data = vec![3];
        let decoded = TransportMessageV0::from_bytes(&data);
        assert!(decoded.is_err());

        assert!(matches!(
            decoded.err().unwrap(),
            CodecError::UnknownMessageHeader
        ));
    }

    #[test]
    fn test_v0_codec() {
        let expected_chunk = get_test_chunk();

        let encoded = encode(
            EncoderVersion::V0,
            expected_chunk.clone().to_transport().unwrap(),
        )
        .unwrap();
        let decoded = decode(EncoderVersion::V0, &encoded).unwrap().unwrap();
        let decoded_chunk = Chunk::from_transport(&decoded).unwrap();

        assert_eq!(expected_chunk, decoded_chunk);
    }
}