cranpose-core 0.21.0

Composition runtime and reactive state for Cranpose
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

use std::rc::Rc;

use super::*;
use crate::{state::StateObject, tests::state_mock::MockState};

#[test]
fn test_readonly_snapshot_creation() {
    let snapshot = ReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), None);
    assert_eq!(snapshot.snapshot_id(), SnapshotId(1));
    assert!(!snapshot.is_disposed());
}

#[test]
fn test_readonly_snapshot_is_valid() {
    let invalid = SnapshotIdSet::new().set(SnapshotId(5));
    let snapshot = ReadonlySnapshot::new(SnapshotId(10), invalid, None);

    let any_snapshot = AnySnapshot::Readonly(snapshot);
    assert!(any_snapshot.is_valid(SnapshotId(1)));
    assert!(any_snapshot.is_valid(SnapshotId(10)));
    assert!(!any_snapshot.is_valid(SnapshotId(5)));
    assert!(!any_snapshot.is_valid(SnapshotId(11)));
}

#[test]
fn test_readonly_snapshot_no_pending_changes() {
    let snapshot = ReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), None);
    assert!(!snapshot.has_pending_changes());
}

#[test]
fn test_readonly_snapshot_enter() {
    let snapshot = ReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), None);

    set_current_snapshot(None);
    assert!(current_snapshot().is_none());

    snapshot.enter(|| {
        let current = current_snapshot();
        assert!(current.is_some());
        assert_eq!(current.unwrap().snapshot_id(), SnapshotId(1));
    });

    assert!(current_snapshot().is_none());
}

#[test]
fn test_readonly_snapshot_enter_restores_previous() {
    let snapshot1 = ReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), None);
    let snapshot2 = ReadonlySnapshot::new(SnapshotId(2), SnapshotIdSet::new(), None);

    snapshot1.enter(|| {
        snapshot2.enter(|| {
            let current = current_snapshot();
            assert_eq!(current.unwrap().snapshot_id(), SnapshotId(2));
        });

        let current = current_snapshot();
        assert_eq!(current.unwrap().snapshot_id(), SnapshotId(1));
    });
}

#[test]
fn test_readonly_snapshot_nested() {
    let parent = ReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), None);
    let nested = parent.take_nested_snapshot(None);

    assert_eq!(nested.snapshot_id(), SnapshotId(1));
}

#[test]
fn test_readonly_snapshot_read_observer() {
    use std::{rc::Rc as ObserverRef, sync::Mutex};

    let read_count = ObserverRef::new(Mutex::new(0));
    let read_count_clone = Rc::clone(&read_count);

    let observer = Rc::new(move |_: &dyn StateObject| {
        *read_count_clone.lock().unwrap() += 1;
    });

    let snapshot = ReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), Some(observer));
    let mock_state = MockState::with_id(0);

    snapshot.record_read(&mock_state);
    snapshot.record_read(&mock_state);

    assert_eq!(*read_count.lock().unwrap(), 2);
}

#[test]
fn test_readonly_snapshot_nested_with_observer() {
    use std::{rc::Rc as ObserverRef, sync::Mutex};

    let parent_reads = ObserverRef::new(Mutex::new(0));
    let parent_reads_clone = Rc::clone(&parent_reads);
    let parent_observer = Rc::new(move |_: &dyn StateObject| {
        *parent_reads_clone.lock().unwrap() += 1;
    });

    let nested_reads = ObserverRef::new(Mutex::new(0));
    let nested_reads_clone = Rc::clone(&nested_reads);
    let nested_observer = Rc::new(move |_: &dyn StateObject| {
        *nested_reads_clone.lock().unwrap() += 1;
    });

    let parent = ReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), Some(parent_observer));
    let nested = parent.take_nested_snapshot(Some(nested_observer));

    let mock_state = MockState::with_id(0);

    nested.record_read(&mock_state);

    assert_eq!(*parent_reads.lock().unwrap(), 1);
    assert_eq!(*nested_reads.lock().unwrap(), 1);
}

#[test]
#[should_panic(expected = "Cannot write to a read-only snapshot")]
fn test_readonly_snapshot_write_panics() {
    let snapshot = ReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), None);
    let mock_state = Rc::new(MockState::with_id(0));
    snapshot.record_write(mock_state);
}

#[test]
fn test_readonly_snapshot_dispose() {
    let snapshot = ReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), None);
    assert!(!snapshot.is_disposed());

    snapshot.dispose();
    assert!(snapshot.is_disposed());
}