cloud-sdk 0.46.0

no_std-first provider-neutral cloud SDK foundations.
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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165

use super::fixture::{RecordingTransport, endpoint};
use super::{
    FingerprintScope, MonotonicDuration, MonotonicInstant, RetryController, RetryDecision,
    RetryEvent, RetryExecutionError, RetryPermitError, build_canonical_fingerprint, policy,
    read_only,
};
use crate::transport::DeliveryPhase;

#[test]
fn permit_rejects_an_observation_before_the_controller_start() {
    let Some(prepared) = read_only("/rollback") else {
        return;
    };
    let mut storage = [0_u8; 512];
    let Some(endpoint) = endpoint() else { return };
    let Ok(fingerprint) =
        build_canonical_fingerprint(prepared, endpoint, FingerprintScope::Absent, &mut storage)
    else {
        return;
    };
    let Some(policy) = policy(2, 10, 20) else {
        return;
    };
    let Ok(mut controller) = RetryController::new(
        fingerprint.subject(),
        None,
        policy,
        MonotonicInstant::new(5),
    ) else {
        return;
    };
    let Ok(RetryDecision::Retry(permit)) = controller.decide_retry(
        RetryEvent::Transport(DeliveryPhase::NotSent),
        fingerprint.subject(),
        MonotonicDuration::new(2),
        MonotonicInstant::new(6),
    ) else {
        return;
    };

    let transport = RecordingTransport::new(endpoint);
    let mut response = [0xA5_u8; 64];
    let mut headers = [0xA5_u8; 8192];
    assert!(matches!(
        permit.execute_blocking(
            MonotonicInstant::new(4),
            &transport,
            &mut response,
            &mut headers,
        ),
        Err(RetryExecutionError::Permit(
            RetryPermitError::MonotonicRollback
        ))
    ));
    assert_eq!(response, [0_u8; 64]);
    assert_eq!(headers, [0_u8; 8192]);
}

#[test]
fn permit_execution_advances_the_controller_clock() {
    let Some(prepared) = read_only("/clock") else {
        return;
    };
    let Some(endpoint) = endpoint() else { return };
    let mut storage = [0_u8; 512];
    let Ok(fingerprint) =
        build_canonical_fingerprint(prepared, endpoint, FingerprintScope::Absent, &mut storage)
    else {
        return;
    };
    let Some(policy) = policy(3, 10, 20) else {
        return;
    };
    let Ok(mut controller) = RetryController::new(
        fingerprint.subject(),
        None,
        policy,
        MonotonicInstant::new(5),
    ) else {
        return;
    };
    let Ok(RetryDecision::Retry(permit)) = controller.decide_retry(
        RetryEvent::Transport(DeliveryPhase::NotSent),
        fingerprint.subject(),
        MonotonicDuration::new(1),
        MonotonicInstant::new(6),
    ) else {
        return;
    };
    let transport = RecordingTransport::new(endpoint);
    let mut response = [0_u8; 64];
    let mut headers = [0_u8; 8192];
    assert!(
        permit
            .execute_blocking(
                MonotonicInstant::new(7),
                &transport,
                &mut response,
                &mut headers,
            )
            .is_ok()
    );
    assert_eq!(transport.calls(), 1);
    assert!(matches!(
        controller.decide_retry(
            RetryEvent::Transport(DeliveryPhase::NotSent),
            fingerprint.subject(),
            MonotonicDuration::new(0),
            MonotonicInstant::new(6),
        ),
        Err(super::RetryPolicyError::MonotonicRollback)
    ));
}

#[test]
fn async_permit_executes_the_bound_request_once() {
    let Some(prepared) = read_only("/async") else {
        return;
    };
    let Some(endpoint) = endpoint() else { return };
    let mut storage = [0_u8; 512];
    let Ok(fingerprint) =
        build_canonical_fingerprint(prepared, endpoint, FingerprintScope::Absent, &mut storage)
    else {
        return;
    };
    let Some(policy) = policy(2, 1, 20) else {
        return;
    };
    let Ok(mut controller) = RetryController::new(
        fingerprint.subject(),
        None,
        policy,
        MonotonicInstant::new(0),
    ) else {
        return;
    };
    let Ok(RetryDecision::Retry(permit)) = controller.decide_retry(
        RetryEvent::Transport(DeliveryPhase::NotSent),
        fingerprint.subject(),
        MonotonicDuration::new(1),
        MonotonicInstant::new(1),
    ) else {
        return;
    };
    let transport = RecordingTransport::new(endpoint);
    let mut response = [0_u8; 64];
    let mut headers = [0_u8; 8192];
    let future = permit.execute_async(
        MonotonicInstant::new(2),
        &transport,
        &mut response,
        &mut headers,
    );
    let mut future = core::pin::pin!(future);
    let waker = Waker::noop();
    let mut context = Context::from_waker(waker);
    assert!(matches!(
        Future::poll(future.as_mut(), &mut context),
        Poll::Ready(Ok(_))
    ));
    assert_eq!(transport.calls(), 1);
}
use core::future::Future;
use core::task::{Context, Poll, Waker};