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
|
//! This module greps parser's code for specially formatted comments and turnes
//! them into tests.
use std::{
collections::HashMap,
fs,
path::{Path, PathBuf},
};
use crate::{
codegen::{self, update, Mode},
project_root, Result,
};
pub fn generate_parser_tests(mode: Mode) -> Result<()> {
let tests = tests_from_dir(&project_root().join(Path::new(codegen::GRAMMAR_DIR)))?;
fn install_tests(tests: &HashMap<String, Test>, into: &str, mode: Mode) -> Result<()> {
let tests_dir = project_root().join(into);
if !tests_dir.is_dir() {
fs::create_dir_all(&tests_dir)?;
}
// ok is never actually read, but it needs to be specified to create a Test in existing_tests
let existing = existing_tests(&tests_dir, true)?;
for t in existing.keys().filter(|&t| !tests.contains_key(t)) {
panic!("Test is deleted: {}", t);
}
let mut new_idx = existing.len() + 1;
for (name, test) in tests {
let path = match existing.get(name) {
Some((path, _test)) => path.clone(),
None => {
let file_name = format!("{:04}_{}.rs", new_idx, name);
new_idx += 1;
tests_dir.join(file_name)
}
};
update(&path, &test.text, mode)?;
}
Ok(())
}
install_tests(&tests.ok, codegen::OK_INLINE_TESTS_DIR, mode)?;
install_tests(&tests.err, codegen::ERR_INLINE_TESTS_DIR, mode)
}
#[derive(Debug)]
struct Test {
pub name: String,
pub text: String,
pub ok: bool,
}
#[derive(Default, Debug)]
struct Tests {
pub ok: HashMap<String, Test>,
pub err: HashMap<String, Test>,
}
fn collect_tests(s: &str) -> Vec<(usize, Test)> {
let mut res = vec![];
let prefix = "// ";
let lines = s.lines().map(str::trim_start).enumerate();
let mut block = vec![];
for (line_idx, line) in lines {
let is_comment = line.starts_with(prefix);
if is_comment {
block.push((line_idx, &line[prefix.len()..]));
} else {
process_block(&mut res, &block);
block.clear();
}
}
process_block(&mut res, &block);
return res;
fn process_block(acc: &mut Vec<(usize, Test)>, block: &[(usize, &str)]) {
if block.is_empty() {
return;
}
let mut ok = true;
let mut block = block.iter();
let (start_line, name) = loop {
match block.next() {
Some(&(idx, line)) if line.starts_with("test ") => {
break (idx, line["test ".len()..].to_string());
}
Some(&(idx, line)) if line.starts_with("test_err ") => {
ok = false;
break (idx, line["test_err ".len()..].to_string());
}
Some(_) => (),
None => return,
}
};
let text: String =
block.map(|(_, line)| *line).chain(std::iter::once("")).collect::<Vec<_>>().join("\n");
assert!(!text.trim().is_empty() && text.ends_with('\n'));
acc.push((start_line, Test { name, text, ok }))
}
}
fn tests_from_dir(dir: &Path) -> Result<Tests> {
let mut res = Tests::default();
for entry in ::walkdir::WalkDir::new(dir) {
let entry = entry.unwrap();
if !entry.file_type().is_file() {
continue;
}
if entry.path().extension().unwrap_or_default() != "rs" {
continue;
}
process_file(&mut res, entry.path())?;
}
let grammar_rs = dir.parent().unwrap().join("grammar.rs");
process_file(&mut res, &grammar_rs)?;
return Ok(res);
fn process_file(res: &mut Tests, path: &Path) -> Result<()> {
let text = fs::read_to_string(path)?;
for (_, test) in collect_tests(&text) {
if test.ok {
if let Some(old_test) = res.ok.insert(test.name.clone(), test) {
Err(format!("Duplicate test: {}", old_test.name))?
}
} else {
if let Some(old_test) = res.err.insert(test.name.clone(), test) {
Err(format!("Duplicate test: {}", old_test.name))?
}
}
}
Ok(())
}
}
fn existing_tests(dir: &Path, ok: bool) -> Result<HashMap<String, (PathBuf, Test)>> {
let mut res = HashMap::new();
for file in fs::read_dir(dir)? {
let file = file?;
let path = file.path();
if path.extension().unwrap_or_default() != "rs" {
continue;
}
let name = {
let file_name = path.file_name().unwrap().to_str().unwrap();
file_name[5..file_name.len() - 3].to_string()
};
let text = fs::read_to_string(&path)?;
let test = Test { name: name.clone(), text, ok };
if let Some(old) = res.insert(name, (path, test)) {
println!("Duplicate test: {:?}", old);
}
}
Ok(res)
}
|
