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
use core::str;
use granit_parser::{Event, Parser, ScanError};
/// Run the parser through the string.
///
/// The parser is run through both the `StrInput` and `BufferedInput` variants. The resulting
/// events are then compared and must match.
///
/// # Returns
/// This function returns the events if parsing succeeds, the error the parser returned otherwise.
///
/// # Panics
/// This function panics if there is a mismatch between the 2 parser invocations with the different
/// input traits.
fn run_parser(input: &str) -> Result<Vec<Event<'_>>, ScanError> {
let mut str_events = vec![];
let mut str_error = None;
let mut iter_events = vec![];
let mut iter_error = None;
for x in Parser::new_from_str(input) {
match x {
Ok(event) => str_events.push(event),
Err(e) => {
str_error = Some(e);
break;
}
}
}
for x in Parser::new_from_iter(input.chars()) {
match x {
Ok(event) => iter_events.push(event),
Err(e) => {
iter_error = Some(e);
break;
}
}
}
// eprintln!("str_events");
// for x in &str_events {
// eprintln!("\t{x:?}");
// }
// eprintln!("iter_events");
// for x in &iter_events {
// eprintln!("\t{x:?}");
// }
assert_eq!(str_events, iter_events);
assert_eq!(str_error, iter_error);
if let Some(err) = str_error {
Err(err)
} else {
Ok(str_events.into_iter().map(|x| x.0).collect())
}
}
#[test]
fn fuzz_1() {
// Crashing with an index out-of-bounds error.
// In `scan_plain_scalar`, we would lookahead 1 and call `skip_break`, which requires a
// lookahead of 2.
let raw_input: &[u8] = &[
1, 39, 110, 117, 108, 108, 34, 13, 13, 13, 13, 13, 10, 13, 13, 13, 13,
];
let s = str::from_utf8(raw_input).unwrap();
let _ = run_parser(s);
}
#[test]
fn fuzz_2() {
// Crashing with an unwrap of a None value.
// There is an imbalance of implicit flow mapping contexts here between the opening `[`/`{` and
// closing `]`/`}`. We would test against flow-level when only `[` can create implicit flow
// mappings.
let raw_input: &[u8] = &[
91, 91, 32, 101, 58, 9, 123, 63, 32, 45, 106, 101, 58, 9, 123, 63, 32, 44, 117, 101, 58, 9,
123, 63, 32, 44, 9, 26, 58, 32, 126, 93, 8, 58, 32, 58, 10, 29, 58, 58, 58, 32, 58, 29, 63,
32, 44, 9, 26, 58, 32, 126, 93, 8, 58, 32, 58, 10, 78, 32,
];
let s = str::from_utf8(raw_input).unwrap();
let _ = run_parser(s);
}
#[test]
fn fuzz_3() {
// Span mismatch when parsing with `StrInput` and `BufferedInput`.
// In block scalars, there was a section in which we took the byte count rather than the char
// count to update the index. The issue didn't happen with `StrInput` as the buffer was always
// full and the offending code was never executed.
let raw_input: &[u8] = &[124, 13, 32, 210, 180, 65];
let s = str::from_utf8(raw_input).unwrap();
let _ = run_parser(s);
}