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|
mod sourcegen_ast;
mod ast_src;
use std::{
fs,
path::{Path, PathBuf},
};
use ast::HasName;
use expect_test::expect_file;
use rayon::prelude::*;
use test_utils::{bench, bench_fixture, project_root};
use crate::{ast, fuzz, AstNode, SourceFile, SyntaxError};
#[test]
fn parse_smoke_test() {
let code = r##"
fn main() {
println!("Hello, world!")
}
"##;
let parse = SourceFile::parse(code);
// eprintln!("{:#?}", parse.syntax_node());
assert!(parse.ok().is_ok());
}
#[test]
fn benchmark_parser() {
if std::env::var("RUN_SLOW_BENCHES").is_err() {
return;
}
let data = bench_fixture::glorious_old_parser();
let tree = {
let _b = bench("parsing");
let p = SourceFile::parse(&data);
assert!(p.errors.is_empty());
assert_eq!(p.tree().syntax.text_range().len(), 352474.into());
p.tree()
};
{
let _b = bench("tree traversal");
let fn_names =
tree.syntax().descendants().filter_map(ast::Fn::cast).filter_map(|f| f.name()).count();
assert_eq!(fn_names, 268);
}
}
#[test]
fn validation_tests() {
dir_tests(&test_data_dir(), &["parser/validation"], "rast", |text, path| {
let parse = SourceFile::parse(text);
let errors = parse.errors();
assert_errors_are_present(errors, path);
parse.debug_dump()
});
}
#[test]
fn parser_fuzz_tests() {
for (_, text) in collect_rust_files(&test_data_dir(), &["parser/fuzz-failures"]) {
fuzz::check_parser(&text)
}
}
#[test]
fn reparse_fuzz_tests() {
for (_, text) in collect_rust_files(&test_data_dir(), &["reparse/fuzz-failures"]) {
let check = fuzz::CheckReparse::from_data(text.as_bytes()).unwrap();
check.run();
}
}
/// Test that Rust-analyzer can parse and validate the rust-analyzer
#[test]
fn self_hosting_parsing() {
let crates_dir = project_root().join("crates");
let mut files = ::sourcegen::list_rust_files(&crates_dir);
files.retain(|path| {
// Get all files which are not in the crates/syntax/test_data folder
!path.components().any(|component| component.as_os_str() == "test_data")
});
assert!(
files.len() > 100,
"self_hosting_parsing found too few files - is it running in the right directory?"
);
let errors = files
.into_par_iter()
.filter_map(|file| {
let text = read_text(&file);
match SourceFile::parse(&text).ok() {
Ok(_) => None,
Err(err) => Some((file, err)),
}
})
.collect::<Vec<_>>();
if !errors.is_empty() {
let errors = errors
.into_iter()
.map(|(path, err)| format!("{}: {:?}\n", path.display(), err[0]))
.collect::<String>();
panic!("Parsing errors:\n{}\n", errors);
}
}
fn test_data_dir() -> PathBuf {
project_root().join("crates/syntax/test_data")
}
fn assert_errors_are_present(errors: &[SyntaxError], path: &Path) {
assert!(!errors.is_empty(), "There should be errors in the file {:?}", path.display());
}
/// Calls callback `f` with input code and file paths for each `.rs` file in `test_data_dir`
/// subdirectories defined by `paths`.
///
/// If the content of the matching output file differs from the output of `f()`
/// the test will fail.
///
/// If there is no matching output file it will be created and filled with the
/// output of `f()`, but the test will fail.
fn dir_tests<F>(test_data_dir: &Path, paths: &[&str], outfile_extension: &str, f: F)
where
F: Fn(&str, &Path) -> String,
{
for (path, input_code) in collect_rust_files(test_data_dir, paths) {
let actual = f(&input_code, &path);
let path = path.with_extension(outfile_extension);
expect_file![path].assert_eq(&actual)
}
}
/// Collects all `.rs` files from `dir` subdirectories defined by `paths`.
fn collect_rust_files(root_dir: &Path, paths: &[&str]) -> Vec<(PathBuf, String)> {
paths
.iter()
.flat_map(|path| {
let path = root_dir.to_owned().join(path);
rust_files_in_dir(&path).into_iter()
})
.map(|path| {
let text = read_text(&path);
(path, text)
})
.collect()
}
/// Collects paths to all `.rs` files from `dir` in a sorted `Vec<PathBuf>`.
fn rust_files_in_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
}
/// 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_or_else(|_| panic!("File at {:?} should be valid", path))
.replace("\r\n", "\n")
}
|
