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extern crate ra_syntax;
#[macro_use]
extern crate test_utils;
extern crate walkdir;
use std::{
fmt::Write,
fs,
path::{Path, PathBuf, Component},
};
use ra_syntax::{
utils::{check_fuzz_invariants, dump_tree},
SourceFileNode,
};
#[test]
fn lexer_tests() {
dir_tests(&["lexer"], |text, _| {
let tokens = ra_syntax::tokenize(text);
dump_tokens(&tokens, text)
})
}
#[test]
fn parser_tests() {
dir_tests(&["parser/inline/ok", "parser/ok"], |text, path| {
let file = SourceFileNode::parse(text);
let errors = file.errors();
assert_eq!(
&*errors,
&[] as &[ra_syntax::SyntaxError],
"There should be no errors in the file {:?}",
path.display()
);
dump_tree(file.syntax())
});
dir_tests(&["parser/err", "parser/inline/err"], |text, path| {
let file = SourceFileNode::parse(text);
let errors = file.errors();
assert_ne!(
&*errors,
&[] as &[ra_syntax::SyntaxError],
"There should be errors in the file {:?}",
path.display()
);
dump_tree(file.syntax())
});
}
#[test]
fn parser_fuzz_tests() {
for (_, text) in collect_tests(&["parser/fuzz-failures"]) {
check_fuzz_invariants(&text)
}
}
/// Test that Rust-analyzer can parse and validate the rust-analyser
/// TODO: Use this as a benchmark
#[test]
fn self_hosting_parsing() {
use std::ffi::OsStr;
let dir = project_dir().join("crates");
let mut count = 0;
for entry in walkdir::WalkDir::new(dir)
.into_iter()
.filter_entry(|entry| {
!entry
.path()
.components()
// TODO: this more neatly
.any(|component| {
// Get all files which are not in the crates/ra_syntax/tests/data folder
component == Component::Normal(OsStr::new("data"))
})
})
.map(|e| e.unwrap())
.filter(|entry| {
// Get all `.rs ` files
!entry.path().is_dir() && (entry.path().extension() == Some(OsStr::new("rs")))
})
{
count += 1;
let text = read_text(entry.path());
let node = SourceFileNode::parse(&text);
let errors = node.errors();
assert_eq!(
&*errors,
&[],
"There should be no errors in the file {:?}",
entry
);
}
assert!(
count > 30,
"self_hosting_parsing found too few files - is it running in the right directory?"
)
}
/// 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)
.expect(&format!("File at {:?} should be valid", path))
.replace("\r\n", "\n")
}
fn dir_tests<F>(paths: &[&str], f: F)
where
F: Fn(&str, &Path) -> String,
{
for (path, input_code) in collect_tests(paths) {
let parse_tree = f(&input_code, &path);
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/ra_syntax/tests/data")
}
fn dump_tokens(tokens: &[ra_syntax::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
}
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