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| 1 | //! Drives random page-model mutations through the page writer and checks its contract: |
| 2 | //! a published model reads back as written, and objects outside the edit keep their bytes. |
| 3 | |
| 4 | use onestore::{ |
| 5 | ExGuid, PreparedEdit, RevisionIndex, Store, |
| 6 | document::{Document, Format, Layout}, |
| 7 | page::{ |
| 8 | Outline, Page, PageObject, PageParagraph, Paragraph, ParagraphContent, |
| 9 | text::{Edit, new_id}, |
| 10 | }, |
| 11 | }; |
| 12 | use std::{collections::BTreeSet, sync::LazyLock}; |
| 13 | |
| 14 | #[path = "current.rs"] |
| 15 | pub(crate) mod current; |
| 16 | |
| 17 | static SOURCES: LazyLock<[Vec<u8>; 4]> = LazyLock::new(|| { |
| 18 | [ |
| 19 | onestore::create_section("model.one", "Original 🦀 é 東京", "Author").unwrap(), |
| 20 | include_bytes!("../../../../corpus/outline-edit/before/notebook/synthetic.one").to_vec(), |
| 21 | include_bytes!("../../../../corpus/paragraph-edit/before/notebook/synthetic.one").to_vec(), |
| 22 | include_bytes!("../../../../corpus/outline-edit/tree/before/notebook/synthetic.one") |
| 23 | .to_vec(), |
| 24 | ] |
| 25 | }); |
| 26 | |
| 27 | struct Bytes<'a> { |
| 28 | input: &'a [u8], |
| 29 | at: usize, |
| 30 | } |
| 31 | |
| 32 | impl Bytes<'_> { |
| 33 | fn next(&mut self) -> Option<u8> { |
| 34 | let byte = *self.input.get(self.at)?; |
| 35 | self.at += 1; |
| 36 | Some(byte) |
| 37 | } |
| 38 | |
| 39 | fn pick(&mut self, count: usize) -> Option<usize> { |
| 40 | if count == 0 { |
| 41 | return None; |
| 42 | } |
| 43 | Some(usize::from(self.next().unwrap_or(0)) % count) |
| 44 | } |
| 45 | |
| 46 | fn text(&mut self) -> String { |
| 47 | let length = usize::from(self.next().unwrap_or(0)) % 12; |
| 48 | let mut text = String::new(); |
| 49 | for _ in 0..length { |
| 50 | text.push(match self.next().unwrap_or(b' ') % 12 { |
| 51 | 0 => '🦀', |
| 52 | 1 => 'é', |
| 53 | 2 => '\u{301}', |
| 54 | 3 => '東', |
| 55 | 4 => ' ', |
| 56 | 5 => '\u{05e9}', |
| 57 | 6 => '\u{000b}', |
| 58 | n => (b'a' + n) as char, |
| 59 | }); |
| 60 | } |
| 61 | text |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | fn model(bytes: &[u8], space: ExGuid) -> Option<Page> { |
| 66 | let store = Store::parse(bytes).ok()?; |
| 67 | let index = RevisionIndex::parse(&store).ok()?; |
| 68 | let document = Document::parse(&index).ok()?; |
| 69 | Page::from_space(&document, space).ok() |
| 70 | } |
| 71 | |
| 72 | /// What the writer promises to reproduce exactly; other fields are writer- or reader-owned. |
| 73 | fn projection(page: &Page) -> String { |
| 74 | let mut out = String::new(); |
| 75 | for object in &page.objects { |
| 76 | match object { |
| 77 | PageObject::Outline(outline) => { |
| 78 | // A new outline without a width takes the writer's 468 pt default. |
| 79 | out.push_str(&format!( |
| 80 | "outline {} {:?} {:?} {:?}\n", |
| 81 | outline.id, |
| 82 | outline.layout.x, |
| 83 | outline.layout.y, |
| 84 | outline.layout.max_width.unwrap_or(468.0) |
| 85 | )); |
| 86 | for paragraph in &outline.paragraphs { |
| 87 | out.push_str(&format!( |
| 88 | " {} parent {:?} collapsed {}", |
| 89 | paragraph.id, paragraph.parent, paragraph.collapsed |
| 90 | )); |
| 91 | match ¶graph.content { |
| 92 | ParagraphContent::Text(text) => { |
| 93 | out.push_str(&format!(" text {} {:?}", text.id, text.text.text())); |
| 94 | for span in text.text.spans() { |
| 95 | let f = &span.format; |
| 96 | out.push_str(&format!( |
| 97 | " [{} {:?} {:?} {:?} {:?} {:?} {:?} {:?} {:?} {:?} {:?}]", |
| 98 | span.end, |
| 99 | f.bold.unwrap_or(false), |
| 100 | f.italic.unwrap_or(false), |
| 101 | f.underline.unwrap_or(false), |
| 102 | f.strike.unwrap_or(false), |
| 103 | f.superscript.unwrap_or(false), |
| 104 | f.subscript.unwrap_or(false), |
| 105 | f.font, |
| 106 | f.font_size, |
| 107 | f.color, |
| 108 | f.highlight |
| 109 | )); |
| 110 | } |
| 111 | } |
| 112 | ParagraphContent::Table(table) => { |
| 113 | out.push_str(&format!(" table {}", table.id)) |
| 114 | } |
| 115 | ParagraphContent::Unsupported(u) => { |
| 116 | out.push_str(&format!(" unsupported {}", u.id)) |
| 117 | } |
| 118 | } |
| 119 | out.push('\n'); |
| 120 | } |
| 121 | } |
| 122 | PageObject::Title(title) => out.push_str(&format!("title {}\n", title.id)), |
| 123 | PageObject::Image(image) => out.push_str(&format!("image {}\n", image.id)), |
| 124 | PageObject::Unsupported(u) => out.push_str(&format!("unsupported {}\n", u.id)), |
| 125 | } |
| 126 | } |
| 127 | out |
| 128 | } |
| 129 | |
| 130 | fn text_paragraphs(outline: &mut Outline) -> Vec<usize> { |
| 131 | outline |
| 132 | .paragraphs |
| 133 | .iter() |
| 134 | .enumerate() |
| 135 | .filter(|(_, p)| p.text().is_some()) |
| 136 | .map(|(i, _)| i) |
| 137 | .collect() |
| 138 | } |
| 139 | |
| 140 | fn fresh_paragraph(template: &PageParagraph, text: String) -> PageParagraph { |
| 141 | let mut paragraph = template.clone(); |
| 142 | paragraph.id = new_id().unwrap(); |
| 143 | paragraph.parent = None; |
| 144 | paragraph.level = 1; |
| 145 | paragraph.lists.clear(); |
| 146 | paragraph.tags.clear(); |
| 147 | paragraph.style = None; |
| 148 | paragraph.collapsed = false; |
| 149 | let format = template |
| 150 | .text() |
| 151 | .map(|t| t.text.format_at(0).unwrap().clone()) |
| 152 | .unwrap_or_default(); |
| 153 | paragraph.content = ParagraphContent::Text(onestore::page::TextObject { |
| 154 | id: new_id().unwrap(), |
| 155 | date_field: None, |
| 156 | text: Paragraph::new(text, format), |
| 157 | tags: Vec::new(), |
| 158 | }); |
| 159 | paragraph |
| 160 | } |
| 161 | |
| 162 | /// Removes a paragraph and every descendant, returning the removed identities. |
| 163 | fn remove_subtree(outline: &mut Outline, index: usize) -> BTreeSet<ExGuid> { |
| 164 | let mut removed = BTreeSet::from([outline.paragraphs[index].id]); |
| 165 | loop { |
| 166 | let before = removed.len(); |
| 167 | for paragraph in &outline.paragraphs { |
| 168 | if paragraph.parent.is_some_and(|p| removed.contains(&p)) { |
| 169 | removed.insert(paragraph.id); |
| 170 | } |
| 171 | } |
| 172 | if removed.len() == before { |
| 173 | break; |
| 174 | } |
| 175 | } |
| 176 | outline.paragraphs.retain(|p| !removed.contains(&p.id)); |
| 177 | removed |
| 178 | } |
| 179 | |
| 180 | fn mutate(page: &mut Page, bytes: &mut Bytes<'_>) { |
| 181 | let steps = usize::from(bytes.next().unwrap_or(0)) % 6 + 1; |
| 182 | for _ in 0..steps { |
| 183 | let Some(kind) = bytes.next() else { return }; |
| 184 | let outlines: Vec<usize> = page |
| 185 | .objects |
| 186 | .iter() |
| 187 | .enumerate() |
| 188 | .filter(|(_, o)| matches!(o, PageObject::Outline(_))) |
| 189 | .map(|(i, _)| i) |
| 190 | .collect(); |
| 191 | match kind % 9 { |
| 192 | 0 | 1 => { |
| 193 | let Some(o) = bytes.pick(outlines.len()) else { |
| 194 | continue; |
| 195 | }; |
| 196 | let PageObject::Outline(outline) = &mut page.objects[outlines[o]] else { |
| 197 | continue; |
| 198 | }; |
| 199 | let texts = text_paragraphs(outline); |
| 200 | let Some(p) = bytes.pick(texts.len()) else { |
| 201 | continue; |
| 202 | }; |
| 203 | let text = outline.paragraphs[texts[p]].text_mut().unwrap(); |
| 204 | let end = text.text.utf16_offset(text.text.text().len()).unwrap(); |
| 205 | let start = bytes.next().map_or(0, |b| u32::from(b) % (end + 1)); |
| 206 | let stop = bytes |
| 207 | .next() |
| 208 | .map_or(end, |b| start + u32::from(b) % (end - start + 1)); |
| 209 | let format = text.text.format_at(start).cloned().unwrap_or_default(); |
| 210 | let replacement = bytes.text(); |
| 211 | let _ = text.text.apply(Edit { |
| 212 | range: start..stop, |
| 213 | replacement: Paragraph::new(replacement, format), |
| 214 | }); |
| 215 | } |
| 216 | 2 => { |
| 217 | let Some(o) = bytes.pick(outlines.len()) else { |
| 218 | continue; |
| 219 | }; |
| 220 | let PageObject::Outline(outline) = &mut page.objects[outlines[o]] else { |
| 221 | continue; |
| 222 | }; |
| 223 | let texts = text_paragraphs(outline); |
| 224 | let Some(p) = bytes.pick(texts.len()) else { |
| 225 | continue; |
| 226 | }; |
| 227 | let text = outline.paragraphs[texts[p]].text_mut().unwrap(); |
| 228 | let end = text.text.utf16_offset(text.text.text().len()).unwrap(); |
| 229 | let start = bytes.next().map_or(0, |b| u32::from(b) % (end + 1)); |
| 230 | let stop = bytes |
| 231 | .next() |
| 232 | .map_or(end, |b| start + u32::from(b) % (end - start + 1)); |
| 233 | let Ok(mut slice) = text.text.slice(start..stop) else { |
| 234 | continue; |
| 235 | }; |
| 236 | let attribute = bytes.next().unwrap_or(0) % 8; |
| 237 | let runs: Vec<(String, Format)> = { |
| 238 | let mut runs = Vec::new(); |
| 239 | let mut from = 0; |
| 240 | for span in slice.spans() { |
| 241 | let mut format = span.format.clone(); |
| 242 | match attribute { |
| 243 | 0 => format.bold = Some(!format.bold.unwrap_or(false)), |
| 244 | 1 => format.italic = Some(!format.italic.unwrap_or(false)), |
| 245 | 2 => format.underline = Some(!format.underline.unwrap_or(false)), |
| 246 | 3 => format.strike = Some(!format.strike.unwrap_or(false)), |
| 247 | 4 => { |
| 248 | format.font_size = Some(if format.font_size == Some(14.0) { |
| 249 | 11.0 |
| 250 | } else { |
| 251 | 14.0 |
| 252 | }) |
| 253 | } |
| 254 | 5 => { |
| 255 | format.color = Some(if format.color == Some(0x00ff) { |
| 256 | 0xff000000 |
| 257 | } else { |
| 258 | 0x00ff |
| 259 | }) |
| 260 | } |
| 261 | 6 => format.highlight = Some(0x00ffff), |
| 262 | _ => format.font = Some("Consolas".into()), |
| 263 | } |
| 264 | runs.push((slice.text()[from..span.end].to_owned(), format)); |
| 265 | from = span.end; |
| 266 | } |
| 267 | runs |
| 268 | }; |
| 269 | slice = Paragraph::from_runs(runs); |
| 270 | let _ = text.text.apply(Edit { |
| 271 | range: start..stop, |
| 272 | replacement: slice, |
| 273 | }); |
| 274 | } |
| 275 | 3 => { |
| 276 | let Some(o) = bytes.pick(outlines.len()) else { |
| 277 | continue; |
| 278 | }; |
| 279 | let PageObject::Outline(outline) = &mut page.objects[outlines[o]] else { |
| 280 | continue; |
| 281 | }; |
| 282 | let Some(template) = outline |
| 283 | .paragraphs |
| 284 | .iter() |
| 285 | .find(|p| p.text().is_some()) |
| 286 | .cloned() |
| 287 | else { |
| 288 | continue; |
| 289 | }; |
| 290 | let mut fresh = fresh_paragraph(&template, bytes.text()); |
| 291 | // Only subtree boundaries keep the pre-order flattening valid. |
| 292 | let boundaries: Vec<usize> = (0..=outline.paragraphs.len()) |
| 293 | .filter(|i| { |
| 294 | outline |
| 295 | .paragraphs |
| 296 | .get(*i) |
| 297 | .is_none_or(|p| p.parent.is_none()) |
| 298 | }) |
| 299 | .collect(); |
| 300 | let at = boundaries[bytes.pick(boundaries.len()).unwrap_or(0)]; |
| 301 | if bytes.next().unwrap_or(0).is_multiple_of(3) |
| 302 | && let Some(parent) = at.checked_sub(1).map(|i| &outline.paragraphs[i]) |
| 303 | { |
| 304 | fresh.parent = Some(parent.id); |
| 305 | fresh.level = parent.level + 1; |
| 306 | } |
| 307 | outline.paragraphs.insert(at, fresh); |
| 308 | } |
| 309 | 4 => { |
| 310 | let Some(o) = bytes.pick(outlines.len()) else { |
| 311 | continue; |
| 312 | }; |
| 313 | let PageObject::Outline(outline) = &mut page.objects[outlines[o]] else { |
| 314 | continue; |
| 315 | }; |
| 316 | let Some(index) = bytes.pick(outline.paragraphs.len()) else { |
| 317 | continue; |
| 318 | }; |
| 319 | remove_subtree(outline, index); |
| 320 | } |
| 321 | 5 => { |
| 322 | let Some(o) = bytes.pick(outlines.len()) else { |
| 323 | continue; |
| 324 | }; |
| 325 | let PageObject::Outline(outline) = &mut page.objects[outlines[o]] else { |
| 326 | continue; |
| 327 | }; |
| 328 | let top: Vec<usize> = outline |
| 329 | .paragraphs |
| 330 | .iter() |
| 331 | .enumerate() |
| 332 | .filter(|(_, p)| p.parent.is_none()) |
| 333 | .map(|(i, _)| i) |
| 334 | .collect(); |
| 335 | let (Some(from), Some(to)) = (bytes.pick(top.len()), bytes.pick(top.len())) else { |
| 336 | continue; |
| 337 | }; |
| 338 | let moving = outline.paragraphs[top[from]].clone(); |
| 339 | let mut subtree = remove_subtree(outline, top[from]); |
| 340 | subtree.remove(&moving.id); |
| 341 | let mut descendants: Vec<PageParagraph> = Vec::new(); |
| 342 | let mut rest = Vec::new(); |
| 343 | for paragraph in outline.paragraphs.drain(..) { |
| 344 | if subtree.contains(¶graph.id) { |
| 345 | descendants.push(paragraph); |
| 346 | } else { |
| 347 | rest.push(paragraph); |
| 348 | } |
| 349 | } |
| 350 | outline.paragraphs = rest; |
| 351 | let anchor = outline |
| 352 | .paragraphs |
| 353 | .iter() |
| 354 | .enumerate() |
| 355 | .filter(|(_, p)| p.parent.is_none()) |
| 356 | .nth(to.min(top.len().saturating_sub(1))) |
| 357 | .map(|(i, _)| i) |
| 358 | .unwrap_or(outline.paragraphs.len()); |
| 359 | let mut block = vec![moving]; |
| 360 | block.extend(descendants); |
| 361 | for (offset, paragraph) in block.into_iter().enumerate() { |
| 362 | outline.paragraphs.insert(anchor + offset, paragraph); |
| 363 | } |
| 364 | } |
| 365 | 6 => { |
| 366 | let Some(o) = bytes.pick(outlines.len()) else { |
| 367 | continue; |
| 368 | }; |
| 369 | let PageObject::Outline(outline) = &mut page.objects[outlines[o]] else { |
| 370 | continue; |
| 371 | }; |
| 372 | let Some(index) = bytes.pick(outline.paragraphs.len()) else { |
| 373 | continue; |
| 374 | }; |
| 375 | outline.paragraphs[index].collapsed ^= true; |
| 376 | } |
| 377 | 7 => { |
| 378 | let Some(o) = bytes.pick(outlines.len()) else { |
| 379 | continue; |
| 380 | }; |
| 381 | let PageObject::Outline(outline) = &mut page.objects[outlines[o]] else { |
| 382 | continue; |
| 383 | }; |
| 384 | if outline.title { |
| 385 | continue; |
| 386 | } |
| 387 | match bytes.next().unwrap_or(0) % 3 { |
| 388 | 0 => { |
| 389 | outline.layout.x = Some(f32::from(bytes.next().unwrap_or(0)) * 1.5); |
| 390 | outline.layout.y = Some(f32::from(bytes.next().unwrap_or(0)) * 2.25); |
| 391 | } |
| 392 | 1 => { |
| 393 | outline.layout.max_width = |
| 394 | Some(36.0 + f32::from(bytes.next().unwrap_or(0)) * 2.0); |
| 395 | outline.layout.width_set_by_user = Some(true); |
| 396 | } |
| 397 | _ => { |
| 398 | outline.layout.max_width = |
| 399 | Some(36.0 + f32::from(bytes.next().unwrap_or(0)) * 2.0); |
| 400 | outline.layout.width_set_by_user = None; |
| 401 | } |
| 402 | } |
| 403 | } |
| 404 | _ => { |
| 405 | let Some(template) = page.objects.iter().find_map(|o| match o { |
| 406 | PageObject::Outline(outline) => outline |
| 407 | .paragraphs |
| 408 | .iter() |
| 409 | .find(|p| p.text().is_some()) |
| 410 | .cloned(), |
| 411 | _ => None, |
| 412 | }) else { |
| 413 | continue; |
| 414 | }; |
| 415 | let outline = Outline { |
| 416 | id: new_id().unwrap(), |
| 417 | title: false, |
| 418 | min_width: None, |
| 419 | layout: Layout { |
| 420 | x: Some(f32::from(bytes.next().unwrap_or(0)) * 1.5), |
| 421 | y: Some(f32::from(bytes.next().unwrap_or(0)) * 2.25), |
| 422 | ..Default::default() |
| 423 | }, |
| 424 | indents: Vec::new(), |
| 425 | paragraphs: vec![fresh_paragraph(&template, bytes.text())], |
| 426 | unsupported: Vec::new(), |
| 427 | }; |
| 428 | // Titles live in the page's structure list and always follow its children. |
| 429 | let children = page |
| 430 | .objects |
| 431 | .iter() |
| 432 | .position(|o| matches!(o, PageObject::Title(_))) |
| 433 | .unwrap_or(page.objects.len()); |
| 434 | let at = bytes.pick(children + 1).unwrap_or(children); |
| 435 | page.objects.insert(at, PageObject::Outline(outline)); |
| 436 | } |
| 437 | } |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | pub fn run(input: &[u8]) { |
| 442 | let mut bytes = Bytes { input, at: 0 }; |
| 443 | let source = &SOURCES[usize::from(bytes.next().unwrap_or(0)) % SOURCES.len()]; |
| 444 | let store = Store::parse(source).unwrap(); |
| 445 | let index = RevisionIndex::parse(&store).unwrap(); |
| 446 | let document = Document::parse(&index).unwrap(); |
| 447 | let pages = document.pages().unwrap(); |
| 448 | let Some(page_index) = bytes.pick(pages.len()) else { |
| 449 | return; |
| 450 | }; |
| 451 | let (space, page_object) = pages[page_index]; |
| 452 | let Some(mut after) = model(source, space) else { |
| 453 | return; |
| 454 | }; |
| 455 | mutate(&mut after, &mut bytes); |
| 456 | let Ok(edit) = PreparedEdit::page(source, space, &after, "Fuzz author") else { |
| 457 | return; |
| 458 | }; |
| 459 | let written = edit.as_bytes(); |
| 460 | if written == source.as_slice() { |
| 461 | let before = model(source, space).unwrap(); |
| 462 | assert_eq!( |
| 463 | projection(&before), |
| 464 | projection(&after), |
| 465 | "an unchanged model publishes nothing" |
| 466 | ); |
| 467 | return; |
| 468 | } |
| 469 | current::current(written); |
| 470 | let stored = model(written, space).expect("the written page reads back"); |
| 471 | let (stored, expected) = (projection(&stored), projection(&after)); |
| 472 | if stored != expected { |
| 473 | let differences: Vec<String> = stored |
| 474 | .lines() |
| 475 | .zip(expected.lines()) |
| 476 | .filter(|(a, b)| a != b) |
| 477 | .map(|(a, b)| format!("stored: {a}\nexpected: {b}")) |
| 478 | .collect(); |
| 479 | panic!( |
| 480 | "model round trip ({} vs {} lines):\n{}", |
| 481 | stored.lines().count(), |
| 482 | expected.lines().count(), |
| 483 | differences.join("\n") |
| 484 | ); |
| 485 | } |
| 486 | let raw_before = index.resolve_active(space).unwrap(); |
| 487 | let store = Store::parse(written).unwrap(); |
| 488 | let index = RevisionIndex::parse(&store).unwrap(); |
| 489 | let raw_after = index.resolve_active(space).unwrap(); |
| 490 | let mut modeled = BTreeSet::from([page_object]); |
| 491 | for object in &after.objects { |
| 492 | modeled.insert(object.id()); |
| 493 | let outlines: Vec<&Outline> = match object { |
| 494 | PageObject::Outline(outline) => vec![outline], |
| 495 | PageObject::Title(title) => title.outlines.iter().collect(), |
| 496 | _ => Vec::new(), |
| 497 | }; |
| 498 | for outline in outlines { |
| 499 | modeled.insert(outline.id); |
| 500 | for paragraph in &outline.paragraphs { |
| 501 | modeled.insert(paragraph.id); |
| 502 | if let Some(text) = paragraph.text() { |
| 503 | modeled.insert(text.id); |
| 504 | } |
| 505 | } |
| 506 | } |
| 507 | } |
| 508 | // Revision roots carry derived metadata such as the automatic navigation title, and |
| 509 | // outline groups (0x60019) are containers the model flattens but the writers normalize. |
| 510 | let roots: BTreeSet<ExGuid> = raw_before.roots.values().copied().collect(); |
| 511 | for (id, object) in &raw_before.objects { |
| 512 | if modeled.contains(id) |
| 513 | || roots.contains(id) |
| 514 | || matches!(object.jcid, 0x12004d | 0x120001 | 0x60019) |
| 515 | { |
| 516 | continue; |
| 517 | } |
| 518 | let Some(after) = raw_after.objects.get(id) else { |
| 519 | panic!("{id} disappeared from the active revision"); |
| 520 | }; |
| 521 | assert_eq!( |
| 522 | (object.jcid, object.data), |
| 523 | (after.jcid, after.data), |
| 524 | "{id} changed outside the model" |
| 525 | ); |
| 526 | } |
| 527 | } |
clover caruso <git@paperclover.net> 2026-09-10 23:05:38-07:00