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
|
extern crate libsyntax2;
#[macro_use]
extern crate test_utils;
extern crate walkdir;
use std::{
fs,
path::{Path, PathBuf},
fmt::Write,
};
use libsyntax2::{
File,
utils::{dump_tree, check_fuzz_invariants},
};
#[test]
fn lexer_tests() {
dir_tests(&["lexer"], |text| {
let tokens = libsyntax2::tokenize(text);
dump_tokens(&tokens, text)
})
}
#[test]
fn parser_tests() {
dir_tests(&["parser/inline", "parser/ok", "parser/err"], |text| {
let file = File::parse(text);
dump_tree(file.syntax())
})
}
#[test]
fn parser_fuzz_tests() {
for (_, text) in collect_tests(&["parser/fuzz-failures"]) {
check_fuzz_invariants(&text)
}
}
/// Read file and normalize newlines.
///
/// `rustc` seems to always normalize `\r\n` newlines to `\n`:
///
/// ```
/// let s = "
/// ";
/// assert_eq!(s.as_bytes(), &[10]);
/// ```
///
/// so this should always be correct.
fn read_text(path: &Path) -> String {
fs::read_to_string(path).unwrap().replace("\r\n", "\n")
}
pub fn dir_tests<F>(paths: &[&str], f: F)
where
F: Fn(&str) -> String,
{
for (path, input_code) in collect_tests(paths) {
let parse_tree = f(&input_code);
let path = path.with_extension("txt");
if !path.exists() {
println!("\nfile: {}", path.display());
println!("No .txt file with expected result, creating...\n");
println!("{}\n{}", input_code, parse_tree);
fs::write(&path, parse_tree).unwrap();
panic!("No expected result")
}
let expected = read_text(&path);
let expected = expected.as_str();
let parse_tree = parse_tree.as_str();
assert_equal_text(expected, parse_tree, &path);
}
}
const REWRITE: bool = false;
fn assert_equal_text(expected: &str, actual: &str, path: &Path) {
if expected == actual {
return;
}
let dir = project_dir();
let pretty_path = path.strip_prefix(&dir).unwrap_or_else(|_| path);
if expected.trim() == actual.trim() {
println!("whitespace difference, rewriting");
println!("file: {}\n", pretty_path.display());
fs::write(path, actual).unwrap();
return;
}
if REWRITE {
println!("rewriting {}", pretty_path.display());
fs::write(path, actual).unwrap();
return;
}
assert_eq_text!(expected, actual, "file: {}", pretty_path.display());
}
fn collect_tests(paths: &[&str]) -> Vec<(PathBuf, String)> {
paths
.iter()
.flat_map(|path| {
let path = test_data_dir().join(path);
test_from_dir(&path).into_iter()
})
.map(|path| {
let text = read_text(&path);
(path, text)
})
.collect()
}
fn test_from_dir(dir: &Path) -> Vec<PathBuf> {
let mut acc = Vec::new();
for file in fs::read_dir(&dir).unwrap() {
let file = file.unwrap();
let path = file.path();
if path.extension().unwrap_or_default() == "rs" {
acc.push(path);
}
}
acc.sort();
acc
}
fn project_dir() -> PathBuf {
let dir = env!("CARGO_MANIFEST_DIR");
PathBuf::from(dir)
.parent()
.unwrap()
.parent()
.unwrap()
.to_owned()
}
fn test_data_dir() -> PathBuf {
project_dir().join("crates/libsyntax2/tests/data")
}
fn dump_tokens(tokens: &[libsyntax2::Token], text: &str) -> String {
let mut acc = String::new();
let mut offset = 0;
for token in tokens {
let len: u32 = token.len.into();
let len = len as usize;
let token_text = &text[offset..offset + len];
offset += len;
write!(acc, "{:?} {} {:?}\n", token.kind, token.len, token_text).unwrap()
}
acc
}
|
