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1dffbe5c37
This improving this code is not a good use of people-time, and this might be the most performant approach nonwithstanding an api for this use case being added to walkdir
208 lines
5.5 KiB
Rust
208 lines
5.5 KiB
Rust
extern crate ra_syntax;
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#[macro_use]
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extern crate test_utils;
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extern crate walkdir;
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use std::{
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fmt::Write,
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fs,
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path::{Path, PathBuf, Component},
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};
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use ra_syntax::{
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utils::{check_fuzz_invariants, dump_tree},
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SourceFileNode,
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};
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#[test]
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fn lexer_tests() {
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dir_tests(&["lexer"], |text, _| {
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let tokens = ra_syntax::tokenize(text);
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dump_tokens(&tokens, text)
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})
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}
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#[test]
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fn parser_tests() {
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dir_tests(&["parser/inline/ok", "parser/ok"], |text, path| {
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let file = SourceFileNode::parse(text);
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let errors = file.errors();
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assert_eq!(
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&*errors,
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&[] as &[ra_syntax::SyntaxError],
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"There should be no errors in the file {:?}",
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path.display()
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);
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dump_tree(file.syntax())
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});
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dir_tests(&["parser/err", "parser/inline/err"], |text, path| {
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let file = SourceFileNode::parse(text);
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let errors = file.errors();
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assert_ne!(
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&*errors,
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&[] as &[ra_syntax::SyntaxError],
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"There should be errors in the file {:?}",
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path.display()
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);
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dump_tree(file.syntax())
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});
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}
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#[test]
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fn parser_fuzz_tests() {
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for (_, text) in collect_tests(&["parser/fuzz-failures"]) {
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check_fuzz_invariants(&text)
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}
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}
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/// Test that Rust-analyzer can parse and validate the rust-analyser
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/// TODO: Use this as a benchmark
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#[test]
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fn self_hosting_parsing() {
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use std::ffi::OsStr;
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let dir = project_dir().join("crates");
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let mut count = 0;
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for entry in walkdir::WalkDir::new(dir)
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.into_iter()
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.filter_entry(|entry| {
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!entry.path().components().any(|component| {
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// Get all files which are not in the crates/ra_syntax/tests/data folder
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component == Component::Normal(OsStr::new("data"))
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})
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})
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.map(|e| e.unwrap())
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.filter(|entry| {
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// Get all `.rs ` files
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!entry.path().is_dir() && (entry.path().extension() == Some(OsStr::new("rs")))
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})
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{
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count += 1;
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let text = read_text(entry.path());
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let node = SourceFileNode::parse(&text);
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let errors = node.errors();
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assert_eq!(
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&*errors,
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&[],
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"There should be no errors in the file {:?}",
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entry
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);
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}
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assert!(
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count > 30,
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"self_hosting_parsing found too few files - is it running in the right directory?"
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)
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}
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/// Read file and normalize newlines.
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///
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/// `rustc` seems to always normalize `\r\n` newlines to `\n`:
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///
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/// ```
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/// let s = "
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/// ";
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/// assert_eq!(s.as_bytes(), &[10]);
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/// ```
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///
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/// so this should always be correct.
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fn read_text(path: &Path) -> String {
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fs::read_to_string(path)
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.expect(&format!("File at {:?} should be valid", path))
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.replace("\r\n", "\n")
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}
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fn dir_tests<F>(paths: &[&str], f: F)
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where
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F: Fn(&str, &Path) -> String,
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{
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for (path, input_code) in collect_tests(paths) {
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let parse_tree = f(&input_code, &path);
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let path = path.with_extension("txt");
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if !path.exists() {
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println!("\nfile: {}", path.display());
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println!("No .txt file with expected result, creating...\n");
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println!("{}\n{}", input_code, parse_tree);
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fs::write(&path, &parse_tree).unwrap();
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panic!("No expected result")
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}
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let expected = read_text(&path);
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let expected = expected.as_str();
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let parse_tree = parse_tree.as_str();
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assert_equal_text(expected, parse_tree, &path);
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}
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}
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const REWRITE: bool = false;
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fn assert_equal_text(expected: &str, actual: &str, path: &Path) {
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if expected == actual {
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return;
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}
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let dir = project_dir();
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let pretty_path = path.strip_prefix(&dir).unwrap_or_else(|_| path);
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if expected.trim() == actual.trim() {
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println!("whitespace difference, rewriting");
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println!("file: {}\n", pretty_path.display());
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fs::write(path, actual).unwrap();
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return;
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}
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if REWRITE {
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println!("rewriting {}", pretty_path.display());
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fs::write(path, actual).unwrap();
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return;
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}
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assert_eq_text!(expected, actual, "file: {}", pretty_path.display());
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}
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fn collect_tests(paths: &[&str]) -> Vec<(PathBuf, String)> {
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paths
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.iter()
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.flat_map(|path| {
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let path = test_data_dir().join(path);
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test_from_dir(&path).into_iter()
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})
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.map(|path| {
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let text = read_text(&path);
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(path, text)
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})
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.collect()
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}
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fn test_from_dir(dir: &Path) -> Vec<PathBuf> {
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let mut acc = Vec::new();
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for file in fs::read_dir(&dir).unwrap() {
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let file = file.unwrap();
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let path = file.path();
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if path.extension().unwrap_or_default() == "rs" {
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acc.push(path);
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}
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}
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acc.sort();
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acc
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}
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fn project_dir() -> PathBuf {
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let dir = env!("CARGO_MANIFEST_DIR");
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PathBuf::from(dir)
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.parent()
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.unwrap()
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.parent()
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.unwrap()
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.to_owned()
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}
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fn test_data_dir() -> PathBuf {
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project_dir().join("crates/ra_syntax/tests/data")
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}
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fn dump_tokens(tokens: &[ra_syntax::Token], text: &str) -> String {
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let mut acc = String::new();
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let mut offset = 0;
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for token in tokens {
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let len: u32 = token.len.into();
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let len = len as usize;
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let token_text = &text[offset..offset + len];
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offset += len;
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write!(acc, "{:?} {} {:?}\n", token.kind, token.len, token_text).unwrap()
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}
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acc
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}
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