cranpose-core 0.20.0

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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148

use std::rc::{Rc, Weak};

use super::*;
use crate::tests::state_mock::MockState;

// A root mutable snapshot with id 1 and no invalid ids.
fn root_snapshot() -> Rc<MutableSnapshot> {
    MutableSnapshot::new(
        SnapshotId(1),
        SnapshotIdSet::new(),
        None,
        None,
        SnapshotId(0),
    )
}

// A nested mutable snapshot with id 2 under `parent`, which has id 1.
fn nested_snapshot(parent: Weak<MutableSnapshot>) -> Rc<NestedMutableSnapshot> {
    NestedMutableSnapshot::new(
        SnapshotId(2),
        SnapshotIdSet::new().set(SnapshotId(1)),
        None,
        None,
        parent,
        SnapshotId(1),
    )
}

#[test]
fn test_nested_readonly_snapshot() {
    let _guard = reset_runtime_for_tests();
    let parent =
        NestedReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), None, Weak::new());
    let parent_weak = Rc::downgrade(&parent);

    let nested =
        NestedReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), None, parent_weak);

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

#[test]
fn test_nested_readonly_snapshot_root() {
    let _guard = reset_runtime_for_tests();
    let parent =
        NestedReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), None, Weak::new());
    let parent_weak = Rc::downgrade(&parent);

    let nested =
        NestedReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), None, parent_weak);

    let root = nested.root_nested_readonly();
    assert_eq!(root.snapshot_id(), SnapshotId(1));
}

#[test]
fn test_nested_readonly_dispose() {
    let _guard = reset_runtime_for_tests();
    let parent =
        NestedReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), None, Weak::new());
    let parent_weak = Rc::downgrade(&parent);

    let nested =
        NestedReadonlySnapshot::new(SnapshotId(1), SnapshotIdSet::new(), None, parent_weak);

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

#[test]
fn test_nested_mutable_snapshot() {
    let _guard = reset_runtime_for_tests();
    let parent = root_snapshot();
    let parent_weak = Rc::downgrade(&parent);

    let nested = nested_snapshot(parent_weak);

    assert_eq!(nested.snapshot_id(), SnapshotId(2));
    assert!(!nested.read_only());
    assert!(!nested.is_disposed());
}

#[test]
fn test_nested_mutable_apply() {
    let _guard = reset_runtime_for_tests();
    let parent = root_snapshot();
    let parent_weak = Rc::downgrade(&parent);

    let nested = nested_snapshot(parent_weak);

    let result = nested.apply();
    assert!(result.is_success());
    assert!(nested.applied.get());
}

#[test]
fn test_nested_merge_sets_parent_pending_changes() {
    let _guard = reset_runtime_for_tests();
    let parent = root_snapshot();
    let child = parent.take_nested_mutable_snapshot(None, None);

    let obj = Rc::new(MockState::with_id(100));
    child.record_write(obj);
    assert!(!parent.has_pending_changes());
    child.apply().check();
    assert!(parent.has_pending_changes());
}

#[test]
fn test_nested_conflict_with_parent_same_object() {
    let _guard = reset_runtime_for_tests();
    let parent = root_snapshot();
    let child = parent.take_nested_mutable_snapshot(None, None);

    let obj = Rc::new(MockState::with_id(200));
    parent.record_write(Rc::<MockState>::clone(&obj));
    child.record_write(obj);

    let result = child.apply();
    assert!(result.is_failure());
}

#[test]
fn test_nested_mutable_apply_twice_fails() {
    let _guard = reset_runtime_for_tests();
    let parent = root_snapshot();
    let parent_weak = Rc::downgrade(&parent);

    let nested = nested_snapshot(parent_weak);

    nested.apply().check();
    let result = nested.apply();
    assert!(result.is_failure());
}

#[test]
fn test_nested_mutable_dispose() {
    let _guard = reset_runtime_for_tests();
    let parent = root_snapshot();
    let parent_weak = Rc::downgrade(&parent);

    let nested = nested_snapshot(parent_weak);

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