//! The engine must never panic on any input: truncated fixtures, garbage, //! and pathological nesting. use impeccable_html::{detect_html_source, DetectHtmlOptions}; use std::path::{Path, PathBuf}; /// The repo root: this workspace is the public repo. `IMPECCABLE_PUBLIC_REPO` /// overrides it for an out-of-tree checkout. fn repo_root() -> PathBuf { if let Ok(p) = std::env::var("IMPECCABLE_PUBLIC_REPO") { return PathBuf::from(p); } Path::new(env!("CARGO_MANIFEST_DIR")).join("../..") } fn fixtures() -> Option { let p = repo_root().join("tests/fixtures/antipatterns"); p.is_dir().then_some(p) } fn scan(html: &str) -> usize { let opts = DetectHtmlOptions::default(); detect_html_source(html, Path::new("/nonexistent/dir/x.html"), &opts).len() } #[test] fn truncated_fixtures_do_not_panic() { let Some(dir) = fixtures() else { eprintln!("fixtures not found; skipping"); return; }; let mut files: Vec = std::fs::read_dir(&dir) .unwrap() .filter_map(|e| e.ok().map(|e| e.path())) .filter(|p| p.extension().is_some_and(|e| e == "html")) .collect(); files.sort(); for f in files.iter().take(12) { let src = String::from_utf8_lossy(&std::fs::read(f).unwrap()).into_owned(); let n = src.len(); let mut cut = 0usize; while cut < n { let mut end = cut; while end < n && !src.is_char_boundary(end) { end += 1; } let _ = scan(&src[..end]); cut += (n / 23).max(7); } } } #[test] fn garbage_and_edge_inputs_do_not_panic() { let cases = [ "", "<", "", "", "", "

", "

text longer than twenty chars

", "

", "", "

\u{FEFF}\u{2028}\u{200B}\u{1F600}

\u{1F600}\u{1F600}\u{1F600}\u{1F600}\u{1F600}\u{1F600}\u{1F600}\u{1F600}\u{1F600}\u{1F600}\u{1F600}

", "

x

y

", "", "l", "

", ]; for c in cases { let _ = scan(c); } let deep = format!( "{}{}", "

".repeat(800), "

".repeat(800) ); let _ = scan(&deep); let wide = format!( "{}", "

text of some length here

".repeat(1000) ); let _ = scan(&wide); let noise: String = (0..4000u32) .map(|i| char::from_u32(0x20 + (i * 7919) % 0x2fff).unwrap_or(' ')) .collect(); let _ = scan(&format!( "

{noise}

" )); }