crux_core 0.18.0

Cross-platform app development in Rust
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

use serde::{Deserialize, Serialize};

use super::super::Command;
use crate::{Request, capability::Operation};

#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
struct AnOperation;
#[derive(Debug, PartialEq, Deserialize)]
struct AnOperationOutput;

impl Operation for AnOperation {
    type Output = AnOperationOutput;
}

enum Effect {
    AnEffect(Request<AnOperation>),
}

impl From<Request<AnOperation>> for Effect {
    fn from(request: Request<AnOperation>) -> Self {
        Self::AnEffect(request)
    }
}

#[derive(Debug, PartialEq)]
enum Event {
    Start,
    Completed(AnOperationOutput),
}

// Commands can be constructed without async and dispatch basic
// effects, which are executed lazily when the command is asked for
// emitted events or effects

#[test]
fn done_can_be_created() {
    let mut cmd: Command<Effect, Event> = Command::done();

    assert!(cmd.is_done());
}

#[test]
fn notify_can_be_created_with_an_operation() {
    let mut cmd: Command<Effect, Event> = Command::notify_shell(AnOperation).into();

    assert!(!cmd.is_done());

    assert!(cmd.effects().next().is_some());

    assert!(cmd.is_done());
}

#[test]
fn notify_effect_can_be_inspected() {
    let mut cmd: Command<Effect, Event> = Command::notify_shell(AnOperation).into();

    let effects = cmd.effects().next();

    assert!(effects.is_some());

    let Effect::AnEffect(request) = effects.unwrap();

    assert_eq!(request.operation, AnOperation);
}

#[test]
fn request_effect_can_be_inspected() {
    let mut cmd = Command::request_from_shell(AnOperation).then_send(Event::Completed);

    let effect = cmd.effects().next();
    assert!(effect.is_some());

    let Effect::AnEffect(request) = effect.unwrap();

    assert_eq!(request.operation, AnOperation);
}

// ANCHOR: basic_test
#[test]
fn request_effect_can_be_resolved() {
    let mut cmd = Command::request_from_shell(AnOperation).then_send(Event::Completed);

    let effect = cmd.effects().next();
    assert!(effect.is_some());

    let Effect::AnEffect(mut request) = effect.unwrap();

    assert_eq!(request.operation, AnOperation);

    request
        .resolve(AnOperationOutput)
        .expect("Resolve should succeed");

    let event = cmd.events().next().unwrap();

    assert_eq!(event, Event::Completed(AnOperationOutput));

    assert!(cmd.is_done());
}
// ANCHOR_END: basic_test

#[test]
fn stream_effect_can_be_resolved_multiple_times() {
    let mut cmd = Command::stream_from_shell(AnOperation).then_send(Event::Completed);

    let effect = cmd.effects().next();

    assert!(cmd.events().next().is_none());

    let Effect::AnEffect(mut request) = effect.unwrap();

    assert_eq!(request.operation, AnOperation);

    request
        .resolve(AnOperationOutput)
        .expect("Resolve should succeed");

    let event = cmd.events().next().unwrap();

    assert!(matches!(event, Event::Completed(AnOperationOutput)));

    assert!(cmd.effects().next().is_none());
    assert!(cmd.events().next().is_none());
    assert!(!cmd.is_done());

    request
        .resolve(AnOperationOutput)
        .expect("Resolve should succeed");

    let event = cmd.events().next().unwrap();

    assert!(matches!(event, Event::Completed(AnOperationOutput)));
}

#[test]
fn event_can_be_created() {
    let mut cmd: Command<Effect, _> = Command::event(Event::Start);

    let event = cmd.events().next().unwrap();

    assert_eq!(event, Event::Start);
}