turmoil 0.7.2

Simulation testing framework for distributed systems
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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256

//! Metadata and timestamp tests.

use std::os::unix::fs::{FileExt, OpenOptionsExt};
use std::time::{Duration, UNIX_EPOCH};
use tokio::time::sleep;
use turmoil::fs::shim::std::fs::{
    create_dir, create_dir_all, exists, metadata, remove_file, symlink, symlink_metadata, write,
    OpenOptions,
};
use turmoil::{Builder, Result};

#[test]
fn metadata_is_file_is_dir() -> Result {
    let mut sim = Builder::new().build();
    sim.client("test", async {
        create_dir_all("/data")?;
        let file = OpenOptions::new()
            .read(true)
            .write(true)
            .create(true)
            .open("/data/file.txt")?;
        let meta = file.metadata()?;
        assert!(meta.is_file());
        assert!(!meta.is_dir());
        Ok(())
    });
    sim.run()
}

#[test]
fn metadata_free_function() -> Result {
    let mut sim = Builder::new().build();
    sim.client("test", async {
        create_dir_all("/data")?;
        write("/data/file.txt", b"hello world")?;
        let file_meta = metadata("/data/file.txt")?;
        assert!(file_meta.is_file());
        assert_eq!(file_meta.len(), 11);
        let dir_meta = metadata("/data")?;
        assert!(dir_meta.is_dir());
        let root_meta = metadata("/")?;
        assert!(root_meta.is_dir());
        assert!(metadata("/nonexistent").is_err());
        Ok(())
    });
    sim.run()
}

#[test]
fn timestamp_on_creation() -> Result {
    let mut sim = Builder::new().build();
    sim.client("test", async {
        create_dir("/data")?;
        let file = OpenOptions::new()
            .read(true)
            .write(true)
            .create(true)
            .open("/data/file.txt")?;
        let meta = file.metadata()?;
        let created = meta.created()?;
        let modified = meta.modified()?;
        assert!(created > UNIX_EPOCH);
        assert_eq!(created, modified);
        Ok(())
    });
    sim.run()
}

#[test]
fn mtime_updates_on_write() -> Result {
    let mut sim = Builder::new().build();
    sim.client("test", async {
        create_dir("/data")?;
        let file = OpenOptions::new()
            .read(true)
            .write(true)
            .create(true)
            .open("/data/file.txt")?;
        let initial = file.metadata()?.modified()?;
        sleep(Duration::from_secs(1)).await;
        file.write_all_at(b"hello", 0)?;
        let after = file.metadata()?.modified()?;
        assert!(after > initial);
        Ok(())
    });
    sim.run()
}

#[test]
fn mtime_updates_on_truncate() -> Result {
    let mut sim = Builder::new().build();
    sim.client("test", async {
        create_dir("/data")?;
        let file = OpenOptions::new()
            .read(true)
            .write(true)
            .create(true)
            .open("/data/file.txt")?;
        file.write_all_at(b"hello world", 0)?;
        file.sync_all()?;
        let before = file.metadata()?.modified()?;
        sleep(Duration::from_secs(1)).await;
        file.set_len(5)?;
        let after = file.metadata()?.modified()?;
        assert!(after > before);
        Ok(())
    });
    sim.run()
}

#[test]
fn noatime_behavior() -> Result {
    let mut sim = Builder::new().build();
    sim.client("test", async {
        create_dir("/data")?;
        let file = OpenOptions::new()
            .read(true)
            .write(true)
            .create(true)
            .open("/data/file.txt")?;
        file.write_all_at(b"hello", 0)?;
        let before = file.metadata()?.accessed()?;
        sleep(Duration::from_secs(1)).await;
        let mut buf = [0u8; 5];
        file.read_at(&mut buf, 0)?;
        let after = file.metadata()?.accessed()?;
        assert_eq!(before, after, "noatime: accessed should not change on read");
        Ok(())
    });
    sim.run()
}

#[test]
fn directory_timestamps() -> Result {
    let mut sim = Builder::new().build();
    sim.client("test", async {
        create_dir("/mydir")?;
        let meta = metadata("/mydir")?;
        assert!(meta.is_dir());
        assert!(meta.created()? > UNIX_EPOCH);
        sleep(Duration::from_secs(1)).await;
        create_dir("/mydir/subdir")?;
        let sub_meta = metadata("/mydir/subdir")?;
        assert!(sub_meta.created()? > meta.created()?);
        Ok(())
    });
    sim.run()
}

#[test]
fn dir_mtime_updates_on_content_change() -> Result {
    let mut sim = Builder::new().build();
    sim.client("test", async {
        create_dir("/data")?;
        let initial = metadata("/data")?.modified()?;
        sleep(Duration::from_secs(1)).await;
        write("/data/file.txt", b"hello")?;
        let after_create = metadata("/data")?.modified()?;
        assert!(after_create > initial);
        sleep(Duration::from_secs(1)).await;
        remove_file("/data/file.txt")?;
        let after_remove = metadata("/data")?.modified()?;
        assert!(after_remove >= after_create);
        Ok(())
    });
    sim.run()
}

#[test]
fn permissions_from_metadata() -> Result {
    let mut sim = Builder::new().build();
    sim.client("test", async {
        create_dir("/data")?;

        // Test default file permissions (0o644)
        let file = OpenOptions::new()
            .read(true)
            .write(true)
            .create(true)
            .open("/data/default.txt")?;
        let perms = file.metadata()?.permissions();
        assert_eq!(perms.mode() & 0o777, 0o644);

        // Test custom file permissions via OpenOptionsExt
        let file2 = OpenOptions::new()
            .read(true)
            .write(true)
            .create(true)
            .mode(0o600)
            .open("/data/custom.txt")?;
        let perms2 = file2.metadata()?.permissions();
        assert_eq!(perms2.mode() & 0o777, 0o600);

        // Test directory permissions (0o755 default)
        let dir_meta = metadata("/data")?;
        assert_eq!(dir_meta.permissions().mode() & 0o777, 0o755);

        Ok(())
    });
    sim.run()
}

#[test]
fn exists_function() -> Result {
    let mut sim = Builder::new().build();
    sim.client("test", async {
        // Non-existent paths
        assert!(!exists("/nonexistent"));
        assert!(!exists("/data/file.txt"));

        // Create directory
        create_dir("/data")?;
        assert!(exists("/data"));

        // Create file
        write("/data/file.txt", b"hello")?;
        assert!(exists("/data/file.txt"));

        // Create symlink to existing target
        symlink("/data/file.txt", "/link")?;
        assert!(exists("/link"));

        // Symlink to non-existent target should return false
        symlink("/nonexistent", "/broken_link")?;
        assert!(!exists("/broken_link"));

        Ok(())
    });
    sim.run()
}

#[test]
fn symlink_metadata_timestamps() -> Result {
    let mut sim = Builder::new().build();
    sim.client("test", async {
        write("/target.txt", b"hello")?;
        sleep(Duration::from_secs(1)).await;
        symlink("/target.txt", "/link")?;

        let link_meta = symlink_metadata("/link")?;
        assert!(link_meta.is_symlink());
        assert!(!link_meta.is_file());
        assert!(!link_meta.is_dir());

        // Symlink should have its own timestamp
        let link_created = link_meta.created()?;
        assert!(link_created > UNIX_EPOCH);

        // Target file should have earlier timestamp
        let target_meta = metadata("/target.txt")?;
        assert!(target_meta.created()? < link_created);

        Ok(())
    });
    sim.run()
}