execution-context 0.1.0

An experimental .NET inspired execution context
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

#[macro_use]
extern crate execution_context;

use execution_context::ExecutionContext;
use std::thread;

#[test]
fn test_basic_propagation() {
    flow_local!(static TEST: u32 = 42);
    assert_eq!(*TEST.get(), 42);

    let ec = ExecutionContext::capture();
    TEST.set(23);
    assert_eq!(*TEST.get(), 23);
    ec.run(|| {
        assert_eq!(*TEST.get(), 42);
    });
}

#[test]
fn test_basic_propagation_to_threads() {
    flow_local!(static TEST: u32 = 42);
    assert_eq!(*TEST.get(), 42);

    let ec = ExecutionContext::capture();
    TEST.set(23);
    assert_eq!(*TEST.get(), 23);
    thread::spawn(move || {
        ec.run(|| {
            assert_eq!(*TEST.get(), 42);
            TEST.set(22);
        });
    }).join().unwrap();

    assert_eq!(*TEST.get(), 23);
}

#[test]
fn test_flow_suppression() {
    flow_local!(static TEST: u32 = 42);

    {
        let _guard = ExecutionContext::suppress_flow();
        TEST.set(11111);

        assert!(ExecutionContext::is_flow_suppressed());

        let ec = ExecutionContext::capture();
        ec.run(|| {
            assert!(!ExecutionContext::is_flow_suppressed());
            assert_eq!(*TEST.get(), 42);
        });
    }

    assert!(!ExecutionContext::is_flow_suppressed());
}

#[test]
fn test_flow_disabling() {
    flow_local!(static TEST: u32 = 42);

    {
        let _guard = ExecutionContext::disable_flow();
        TEST.set(11111);

        assert!(ExecutionContext::is_flow_suppressed());

        let ec = ExecutionContext::capture();
        ec.run(|| {
            assert!(ExecutionContext::is_flow_suppressed());
            assert_eq!(*TEST.get(), 42);
        });
    }

    assert!(!ExecutionContext::is_flow_suppressed());
}