uni-btic 2.2.2

Binary Temporal Interval Codec for Uni graph database
Documentation 
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
122
123
124
125
126
127
128
129
130
131
132
133
134

//! Test vectors from BTIC Specification Appendix B.
//!
//! Each test verifies exact byte-level packed representations.

use uni_btic::btic::{Btic, NEG_INF, POS_INF};
use uni_btic::encode;
use uni_btic::parse::parse_btic_literal;

/// Helper: assert packed bytes match expected hex.
fn assert_packed(btic: &Btic, expected: &[u8; 24]) {
    let actual = encode::encode(btic);
    assert_eq!(
        &actual, expected,
        "\nExpected: {:02x?}\nActual:   {:02x?}",
        expected, actual
    );
}

#[test]
fn b1_unix_epoch_instant() {
    // Input: '1970-01-01T00:00:00.000Z'
    let b = parse_btic_literal("1970-01-01T00:00:00.000Z").unwrap();
    assert_eq!(b.lo(), 0);
    assert_eq!(b.hi(), 1);
    assert_eq!(b.meta(), 0x0000_0000_0000_0000);

    let expected: [u8; 24] = [
        0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // lo
        0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, // hi
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // meta
    ];
    assert_packed(&b, &expected);
}

#[test]
fn b2_year_1985() {
    // Input: '1985'
    let b = parse_btic_literal("1985").unwrap();
    assert_eq!(b.lo(), 473_385_600_000);
    assert_eq!(b.hi(), 504_921_600_000);
    assert_eq!(b.meta(), 0x7700_0000_0000_0000);

    let expected: [u8; 24] = [
        0x80, 0x00, 0x00, 0x6E, 0x37, 0xFB, 0x04, 0x00, // lo
        0x80, 0x00, 0x00, 0x75, 0x8F, 0xAC, 0x30, 0x00, // hi
        0x77, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // meta
    ];
    assert_packed(&b, &expected);
}

#[test]
fn b3_neg_inf_to_march_1985() {
    // Input: '/1985-03'
    let b = parse_btic_literal("/1985-03").unwrap();
    assert_eq!(b.lo(), NEG_INF);
    assert_eq!(b.hi(), 481_161_600_000);
    assert_eq!(b.meta(), 0x0500_0000_0000_0000);

    let expected: [u8; 24] = [
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // lo (NEG_INF sign-flipped)
        0x80, 0x00, 0x00, 0x70, 0x07, 0x77, 0x5C, 0x00, // hi
        0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // meta
    ];
    assert_packed(&b, &expected);
}

#[test]
fn b4_500_bce_approximate() {
    // Input: '~500 BCE'
    let b = parse_btic_literal("~500 BCE").unwrap();

    // Astronomical year -499: lo=-0499-01-01, hi=-0498-01-01
    assert_eq!(b.lo(), -77_914_137_600_000);
    assert_eq!(b.hi(), -77_882_601_600_000);
    assert_eq!(b.meta(), 0x7750_0000_0000_0000);

    // Duration should be 365 days (not a leap year)
    assert_eq!(b.duration_ms(), Some(31_536_000_000));

    let expected: [u8; 24] = [
        0x7F, 0xFF, 0xB9, 0x23, 0x33, 0x81, 0x60, 0x00, // lo
        0x7F, 0xFF, 0xB9, 0x2A, 0x8B, 0x32, 0x8C, 0x00, // hi
        0x77, 0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // meta
    ];
    assert_packed(&b, &expected);
}

#[test]
fn b5_fully_unbounded() {
    // Input: '/'
    let b = parse_btic_literal("/").unwrap();
    assert_eq!(b.lo(), NEG_INF);
    assert_eq!(b.hi(), POS_INF);
    assert_eq!(b.meta(), 0x0000_0000_0000_0000);

    let expected: [u8; 24] = [
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // lo
        0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // hi
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // meta
    ];
    assert_packed(&b, &expected);
}

#[test]
fn b6_mixed_granularity() {
    // Input: '1985-03/2024-06-15'
    let b = parse_btic_literal("1985-03/2024-06-15").unwrap();
    assert_eq!(b.lo(), 478_483_200_000); // 1985-03-01
    assert_eq!(b.hi(), 1_718_496_000_000); // 2024-06-16
    assert_eq!(b.meta(), 0x5400_0000_0000_0000);

    let expected: [u8; 24] = [
        0x80, 0x00, 0x00, 0x6F, 0x67, 0xD2, 0x38, 0x00, // lo
        0x80, 0x00, 0x01, 0x90, 0x1E, 0x57, 0xF8, 0x00, // hi
        0x54, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // meta
    ];
    assert_packed(&b, &expected);
}

#[test]
fn b7_ongoing_event() {
    // Input: '2020-03/'
    let b = parse_btic_literal("2020-03/").unwrap();
    assert_eq!(b.lo(), 1_583_020_800_000); // 2020-03-01
    assert_eq!(b.hi(), POS_INF);
    assert_eq!(b.meta(), 0x5000_0000_0000_0000);

    let expected: [u8; 24] = [
        0x80, 0x00, 0x01, 0x70, 0x93, 0x64, 0x78, 0x00, // lo
        0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, // hi
        0x50, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // meta
    ];
    assert_packed(&b, &expected);
}