persy 1.5.2

Transactional Persistence Engine
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

use super::Address;
use crate::id::SegmentId;
use crate::journal::records::{CreateSegment, DeleteRecord, InsertRecord, UpdateRecord};
use crate::transaction::tx_impl::SegmentOperation;
use crate::{
    address::SegmentPageRead,
    allocator::Allocator,
    config::Config,
    device::{MemoryDevice, ReadPage},
};
use std::collections::HashMap;
use std::sync::Arc;

fn init_test_address() -> (Address, SegmentId) {
    let config = Arc::new(Config::new());
    let disc = Box::new(MemoryDevice::new(None).unwrap());
    let (_, allocator) = Allocator::init(disc, &config).unwrap();
    let page = Address::init(&allocator).unwrap();
    allocator.disc_sync().unwrap();
    let addr = Address::new(&Arc::new(allocator), &config, page).unwrap();
    let seg = addr.create_temp_segment("def").unwrap();
    let id = seg.get_segment_id();
    addr.segments.write().unwrap().finalize_create_segment(seg);
    (addr, id)
}

#[test]
fn test_init_and_new_address() {
    let (add, segment_id) = init_test_address();
    assert_eq!(
        add.segments
            .read()
            .unwrap()
            .segment_by_id(segment_id)
            .unwrap()
            .last_page,
        1152
    );
    assert_eq!(
        add.segments.read().unwrap().segment_by_id(segment_id).unwrap().last_pos,
        26
    );
}

#[test]
fn test_insert_update_delete_read_apply_pointer() {
    let (add, segment_id) = init_test_address();
    let (recref, _) = add.allocate(segment_id).unwrap();
    add.insert(segment_id, &recref, 10).unwrap();
    let (recref_1, _) = add.allocate(segment_id).unwrap();
    add.insert(segment_id, &recref_1, 20).unwrap();

    let mut inserted = Vec::new();
    let (recref_2, _) = add.allocate(segment_id).unwrap();
    inserted.push(InsertRecord::new(segment_id, &recref_2, 30));

    let mut updated = Vec::new();
    updated.push(UpdateRecord::new(segment_id, &recref_1, 40, 1));

    let mut deleted = Vec::new();

    deleted.push(DeleteRecord::new(segment_id, &recref, 1));
    let mut seg_ops = Vec::new();
    seg_ops.push(SegmentOperation::Create(CreateSegment::new(
        "def",
        SegmentId::new(20),
        20,
    )));
    let mut c = HashMap::new();
    add.apply(&[], &inserted, &updated, &deleted, &seg_ops, &mut c, false)
        .unwrap();

    let read = add.read(&recref, segment_id).unwrap();
    let read_1 = add.read(&recref_1, segment_id).unwrap();
    let read_2 = add.read(&recref_2, segment_id).unwrap();
    match read {
        Some(_) => assert!(false),
        None => assert!(true),
    }
    match read_1 {
        Some(val) => assert_eq!(val.0, 40),
        None => assert!(false),
    }
    match read_2 {
        Some(val) => assert_eq!(val.0, 30),
        None => assert!(false),
    }
}

#[test]
fn test_insert_scan() {
    let (add, segment_id) = init_test_address();
    let (recref, _) = add.allocate(segment_id).unwrap();
    add.insert(segment_id, &recref, 10).unwrap();
    let (recref_1, _) = add.allocate(segment_id).unwrap();
    add.insert(segment_id, &recref_1, 20).unwrap();
    let mut to_iter = add.scan(segment_id).unwrap();
    let mut count = 0;
    while to_iter.next(&add).is_some() {
        count += 1;
    }
    assert_eq!(count, 2);
    let mut iter = add.scan(segment_id).unwrap();
    let re = iter.next(&add).unwrap();
    assert_eq!(re.page, recref.page);
    assert_eq!(re.pos, recref.pos);
    let re_1 = iter.next(&add).unwrap();
    assert_eq!(re_1.page, recref_1.page);
    assert_eq!(re_1.pos, recref_1.pos);
}

#[test]
fn test_insert_over_page() {
    let (add, segment_id) = init_test_address();
    for z in 0..1000 {
        let (recref, _) = add.allocate(segment_id).unwrap();
        add.insert(segment_id, &recref, z).unwrap();
    }
    let mut to_iter = add.scan(segment_id).unwrap();
    let mut count = 0;
    while to_iter.next(&add).is_some() {
        count += 1;
    }
    assert_eq!(count, 1000);
}

#[test]
fn test_page_correct_size() {
    let page = ReadPage::new(Arc::new(Vec::new()), 2, 1024, 10);
    assert_eq!(page.possible_entries(), 90);
}