sysinfo/
system.rs

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
// Take a look at the license at the top of the repository in the LICENSE file.

// Once https://github.com/rust-lang/rfcs/blob/master/text/1422-pub-restricted.md
// feature gets stabilized, we can move common parts in here.

#[cfg(test)]
mod tests {
    use crate::{ProcessExt, System, SystemExt};

    #[test]
    fn test_refresh_system() {
        let mut sys = System::new();
        sys.refresh_system();
        // We don't want to test on unsupported systems.
        if System::IS_SUPPORTED {
            assert!(sys.total_memory() != 0);
            assert!(sys.free_memory() != 0);
        }
        assert!(sys.total_memory() >= sys.free_memory());
        assert!(sys.total_swap() >= sys.free_swap());
    }

    #[test]
    fn test_refresh_process() {
        let mut sys = System::new();
        assert!(sys.processes().is_empty(), "no process should be listed!");
        // We don't want to test on unsupported systems.

        #[cfg(not(feature = "apple-sandbox"))]
        if System::IS_SUPPORTED {
            assert!(
                sys.refresh_process(crate::get_current_pid().expect("failed to get current pid")),
                "process not listed",
            );
            // Ensure that the process was really added to the list!
            assert!(sys
                .process(crate::get_current_pid().expect("failed to get current pid"))
                .is_some());
        }
    }

    #[test]
    fn test_get_process() {
        let mut sys = System::new();
        sys.refresh_processes();
        let current_pid = match crate::get_current_pid() {
            Ok(pid) => pid,
            _ => {
                if !System::IS_SUPPORTED {
                    return;
                }
                panic!("get_current_pid should work!");
            }
        };
        if let Some(p) = sys.process(current_pid) {
            assert!(p.memory() > 0);
        } else {
            #[cfg(not(feature = "apple-sandbox"))]
            assert!(!System::IS_SUPPORTED);
        }
    }

    #[test]
    fn check_if_send_and_sync() {
        trait Foo {
            fn foo(&self) {}
        }
        impl<T> Foo for T where T: Send {}

        trait Bar {
            fn bar(&self) {}
        }

        impl<T> Bar for T where T: Sync {}

        let mut sys = System::new();
        sys.refresh_processes();
        let current_pid = match crate::get_current_pid() {
            Ok(pid) => pid,
            _ => {
                if !System::IS_SUPPORTED {
                    return;
                }
                panic!("get_current_pid should work!");
            }
        };
        if let Some(p) = sys.process(current_pid) {
            p.foo(); // If this doesn't compile, it'll simply mean that the Process type
                     // doesn't implement the Send trait.
            p.bar(); // If this doesn't compile, it'll simply mean that the Process type
                     // doesn't implement the Sync trait.
        } else {
            #[cfg(not(feature = "apple-sandbox"))]
            assert!(!System::IS_SUPPORTED);
        }
    }

    #[test]
    fn check_hostname_has_no_nuls() {
        let sys = System::new();

        if let Some(hostname) = sys.host_name() {
            assert!(!hostname.contains('\u{0}'))
        }
    }

    #[test]
    fn check_uptime() {
        let sys = System::new();
        let uptime = sys.uptime();
        if System::IS_SUPPORTED {
            std::thread::sleep(std::time::Duration::from_millis(1000));
            let new_uptime = sys.uptime();
            assert!(uptime < new_uptime);
        }
    }

    // This test is used to ensure that the CPU usage computation isn't completely going off
    // when refreshing it too frequently (ie, multiple times in a row in a very small interval).
    #[test]
    fn test_consecutive_cpu_usage_update() {
        use crate::{PidExt, ProcessExt, ProcessRefreshKind, System, SystemExt};
        use std::time::Duration;

        if !System::IS_SUPPORTED {
            return;
        }

        let mut sys = System::new();
        sys.refresh_processes_specifics(ProcessRefreshKind::new().with_cpu());
        sys.refresh_cpu();
        assert!(!sys.cpus().is_empty());
        let mut pids = sys
            .processes()
            .iter()
            .map(|(pid, _)| *pid)
            .take(2)
            .collect::<Vec<_>>();
        let pid = std::process::id();
        pids.push(PidExt::from_u32(pid));
        assert_eq!(pids.len(), 3);

        for _ in 0..3 {
            for pid in &pids {
                sys.refresh_process_specifics(*pid, ProcessRefreshKind::new().with_cpu());
            }
            assert!(sys.process(pids[2]).unwrap().cpu_usage() < sys.cpus().len() as f32 * 100.);
            std::thread::sleep(Duration::from_millis(500));
        }
    }
}