autumn-plugin-aws-lambda 0.3.0

Run an autumn-web application on AWS Lambda
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

//! Tests for the readiness wait.

use std::sync::Arc;
use std::sync::atomic::{AtomicU32, Ordering};
use std::time::Duration;

use autumn_plugin_aws_lambda::__private::wait_until;

const MS: Duration = Duration::from_millis(1);

#[tokio::test(start_paused = true)]
async fn returns_true_at_once_when_ready() {
    let calls = Arc::new(AtomicU32::new(0));
    let c = calls.clone();
    let ready = wait_until(
        move || {
            c.fetch_add(1, Ordering::SeqCst);
            true
        },
        MS * 1000,
        MS * 10,
        MS * 100,
    )
    .await;
    assert!(ready);
    assert_eq!(calls.load(Ordering::SeqCst), 1);
}

#[tokio::test(start_paused = true)]
async fn returns_true_when_ready_later() {
    let calls = Arc::new(AtomicU32::new(0));
    let c = calls.clone();
    let ready = wait_until(
        move || c.fetch_add(1, Ordering::SeqCst) >= 3,
        MS * 1000,
        MS * 10,
        MS * 100,
    )
    .await;
    assert!(ready);
    assert_eq!(calls.load(Ordering::SeqCst), 4);
}

#[tokio::test(start_paused = true)]
async fn returns_false_after_timeout_with_bounded_probes() {
    let calls = Arc::new(AtomicU32::new(0));
    let c = calls.clone();
    let start = tokio::time::Instant::now();
    let ready = wait_until(
        move || {
            c.fetch_add(1, Ordering::SeqCst);
            false
        },
        MS * 1000,
        MS * 10,
        MS * 100,
    )
    .await;
    assert!(!ready);
    // Probes at 0, 10, 30, 70, 150, 250, ..., 950, and 1000 ms: backoff
    // doubles to 100 ms, and the last sleep stops at the timeout.
    assert_eq!(calls.load(Ordering::SeqCst), 14);
    assert_eq!(start.elapsed(), MS * 1000);
}

#[tokio::test(start_paused = true)]
async fn zero_timeout_probes_once() {
    let calls = Arc::new(AtomicU32::new(0));
    let c = calls.clone();
    let ready = wait_until(
        move || {
            c.fetch_add(1, Ordering::SeqCst);
            false
        },
        Duration::ZERO,
        MS * 10,
        MS * 100,
    )
    .await;
    assert!(!ready);
    assert_eq!(calls.load(Ordering::SeqCst), 1);
}

#[tokio::test(start_paused = true)]
async fn zero_initial_delay_does_not_spin() {
    let calls = Arc::new(AtomicU32::new(0));
    let c = calls.clone();
    let ready = wait_until(
        move || {
            c.fetch_add(1, Ordering::SeqCst);
            false
        },
        MS * 100,
        Duration::ZERO,
        Duration::ZERO,
    )
    .await;
    assert!(!ready);
    assert!(calls.load(Ordering::SeqCst) <= 102);
}