sim-table-fs 0.1.3

SIM workspace package for sim table fs.
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

use super::support::*;

#[test]
fn del_requires_read_before_returning_removed_value() {
    let mut cx = cx();
    grant(&mut cx, &[table_fs_write_capability()]);
    let root = test_root("del-write-only");
    let dir = FsDir::open(root.clone()).unwrap();
    std::fs::write(root.join("note.siml"), "\"secret\"").unwrap();

    let err = dir.del(&mut cx, Symbol::new("note")).unwrap_err();

    assert!(matches!(
        err,
        sim_kernel::Error::CapabilityDenied { capability }
            if capability == table_fs_read_capability()
    ));
    assert!(root.join("note.siml").exists());
}

#[test]
fn del_decode_error_leaves_file_in_place() {
    let mut cx = cx();
    grant(
        &mut cx,
        &[table_fs_read_capability(), table_fs_write_capability()],
    );
    let root = test_root("del-bad-codec");
    let dir = FsDir::open(root.clone()).unwrap();
    std::fs::write(root.join("bad.siml"), "(").unwrap();

    dir.del(&mut cx, Symbol::new("bad")).unwrap_err();

    assert!(root.join("bad.siml").exists());
}

#[test]
fn dir_edit_round_trips_with_fs_write() {
    let mut cx = cx();
    grant_edit_authority(&mut cx);
    let root = test_root("dir-edit-roundtrip");
    let dir = FsDir::open(root.clone()).unwrap();
    write_value_with_codec(
        &mut cx,
        &root.join("note.siml"),
        Symbol::qualified("codec", "lisp"),
        "alpha beta",
    );

    dir.edit(&mut cx, Symbol::new("note"), "beta", "gamma", false)
        .unwrap();

    let value = dir.get(&mut cx, Symbol::new("note")).unwrap();
    assert_eq!(
        value.object().as_expr(&mut cx).unwrap(),
        Expr::String("alpha gamma".to_owned())
    );
}

#[test]
fn dir_edit_lines_round_trips_with_fs_write() {
    let mut cx = cx();
    grant_edit_authority(&mut cx);
    let root = test_root("dir-edit-lines");
    let dir = FsDir::open(root.clone()).unwrap();
    write_value_with_codec(
        &mut cx,
        &root.join("note.siml"),
        Symbol::qualified("codec", "lisp"),
        "a\nb\nc\n",
    );

    dir.edit_lines(&mut cx, Symbol::new("note"), 2, 2, "B\n")
        .unwrap();

    let value = dir.get(&mut cx, Symbol::new("note")).unwrap();
    assert_eq!(
        value.object().as_expr(&mut cx).unwrap(),
        Expr::String("a\nB\nc\n".to_owned())
    );
}

#[test]
fn dir_edit_is_atomic_on_failure() {
    let mut cx = cx();
    grant_edit_authority(&mut cx);
    let root = test_root("dir-edit-atomic");
    let dir = FsDir::open(root.clone()).unwrap();
    let path = root.join("note.siml");
    write_value_with_codec(
        &mut cx,
        &path,
        Symbol::qualified("codec", "lisp"),
        "alpha beta",
    );
    let before = std::fs::read_to_string(&path).unwrap();

    let err = dir
        .edit(&mut cx, Symbol::new("note"), "missing", "gamma", false)
        .unwrap_err();

    assert!(err.to_string().contains("pattern not found"));
    assert_eq!(std::fs::read_to_string(path).unwrap(), before);
}

#[test]
fn dir_edit_requires_edit_capability() {
    let mut cx = cx();
    grant(
        &mut cx,
        &[table_fs_read_capability(), table_fs_write_capability()],
    );
    let root = test_root("dir-edit-cap");
    let dir = FsDir::open(root.clone()).unwrap();
    let path = root.join("note.siml");
    write_value_with_codec(
        &mut cx,
        &path,
        Symbol::qualified("codec", "lisp"),
        "alpha beta",
    );

    let err = dir
        .edit(&mut cx, Symbol::new("note"), "beta", "gamma", false)
        .unwrap_err();

    assert!(matches!(
        err,
        sim_kernel::Error::CapabilityDenied { capability }
            if capability == table_fs_edit_capability()
    ));
    let value = dir.get(&mut cx, Symbol::new("note")).unwrap();
    assert_eq!(
        value.object().as_expr(&mut cx).unwrap(),
        Expr::String("alpha beta".to_owned())
    );
}

#[test]
fn dir_edit_requires_write_capability() {
    let mut cx = cx();
    grant(
        &mut cx,
        &[table_fs_read_capability(), table_fs_edit_capability()],
    );
    let root = test_root("dir-edit-write-cap");
    let dir = FsDir::open(root.clone()).unwrap();
    write_value_with_codec(
        &mut cx,
        &root.join("note.siml"),
        Symbol::qualified("codec", "lisp"),
        "alpha beta",
    );

    let err = dir
        .edit(&mut cx, Symbol::new("note"), "beta", "gamma", false)
        .unwrap_err();

    assert!(matches!(
        err,
        sim_kernel::Error::CapabilityDenied { capability }
            if capability == table_fs_write_capability()
    ));
}