1use super::{network::Network, *};
2use clock::ReplicaId;
3use rand::prelude::*;
4use std::{
5 cmp::Ordering,
6 env,
7 iter::Iterator,
8 time::{Duration, Instant},
9};
10
11#[cfg(test)]
12#[ctor::ctor]
13fn init_logger() {
14 if std::env::var("RUST_LOG").is_ok() {
15 env_logger::init();
16 }
17}
18
19#[test]
20fn test_edit() {
21 let mut buffer = Buffer::new(0, 0, "abc".into());
22 assert_eq!(buffer.text(), "abc");
23 buffer.edit([(3..3, "def")]);
24 assert_eq!(buffer.text(), "abcdef");
25 buffer.edit([(0..0, "ghi")]);
26 assert_eq!(buffer.text(), "ghiabcdef");
27 buffer.edit([(5..5, "jkl")]);
28 assert_eq!(buffer.text(), "ghiabjklcdef");
29 buffer.edit([(6..7, "")]);
30 assert_eq!(buffer.text(), "ghiabjlcdef");
31 buffer.edit([(4..9, "mno")]);
32 assert_eq!(buffer.text(), "ghiamnoef");
33}
34
35#[gpui::test(iterations = 100)]
36fn test_random_edits(mut rng: StdRng) {
37 let operations = env::var("OPERATIONS")
38 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
39 .unwrap_or(10);
40
41 let reference_string_len = rng.gen_range(0..3);
42 let mut reference_string = RandomCharIter::new(&mut rng)
43 .take(reference_string_len)
44 .collect::<String>();
45 let mut buffer = Buffer::new(0, 0, reference_string.clone().into());
46 LineEnding::normalize(&mut reference_string);
47
48 buffer.history.group_interval = Duration::from_millis(rng.gen_range(0..=200));
49 let mut buffer_versions = Vec::new();
50 log::info!(
51 "buffer text {:?}, version: {:?}",
52 buffer.text(),
53 buffer.version()
54 );
55
56 for _i in 0..operations {
57 let (edits, _) = buffer.randomly_edit(&mut rng, 5);
58 for (old_range, new_text) in edits.iter().rev() {
59 reference_string.replace_range(old_range.clone(), &new_text);
60 }
61
62 assert_eq!(buffer.text(), reference_string);
63 log::info!(
64 "buffer text {:?}, version: {:?}",
65 buffer.text(),
66 buffer.version()
67 );
68
69 if rng.gen_bool(0.25) {
70 buffer.randomly_undo_redo(&mut rng);
71 reference_string = buffer.text();
72 log::info!(
73 "buffer text {:?}, version: {:?}",
74 buffer.text(),
75 buffer.version()
76 );
77 }
78
79 let range = buffer.random_byte_range(0, &mut rng);
80 assert_eq!(
81 buffer.text_summary_for_range::<TextSummary, _>(range.clone()),
82 TextSummary::from(&reference_string[range])
83 );
84
85 buffer.check_invariants();
86
87 if rng.gen_bool(0.3) {
88 buffer_versions.push((buffer.clone(), buffer.subscribe()));
89 }
90 }
91
92 for (old_buffer, subscription) in buffer_versions {
93 let edits = buffer
94 .edits_since::<usize>(&old_buffer.version)
95 .collect::<Vec<_>>();
96
97 log::info!(
98 "applying edits since version {:?} to old text: {:?}: {:?}",
99 old_buffer.version(),
100 old_buffer.text(),
101 edits,
102 );
103
104 let mut text = old_buffer.visible_text.clone();
105 for edit in edits {
106 let new_text: String = buffer.text_for_range(edit.new.clone()).collect();
107 text.replace(edit.new.start..edit.new.start + edit.old.len(), &new_text);
108 }
109 assert_eq!(text.to_string(), buffer.text());
110
111 for _ in 0..5 {
112 let end_ix = old_buffer.clip_offset(rng.gen_range(0..=old_buffer.len()), Bias::Right);
113 let start_ix = old_buffer.clip_offset(rng.gen_range(0..=end_ix), Bias::Left);
114 let range = old_buffer.anchor_before(start_ix)..old_buffer.anchor_after(end_ix);
115 let mut old_text = old_buffer.text_for_range(range.clone()).collect::<String>();
116 let edits = buffer
117 .edits_since_in_range::<usize>(&old_buffer.version, range.clone())
118 .collect::<Vec<_>>();
119 log::info!(
120 "applying edits since version {:?} to old text in range {:?}: {:?}: {:?}",
121 old_buffer.version(),
122 start_ix..end_ix,
123 old_text,
124 edits,
125 );
126
127 let new_text = buffer.text_for_range(range).collect::<String>();
128 for edit in edits {
129 old_text.replace_range(
130 edit.new.start..edit.new.start + edit.old_len(),
131 &new_text[edit.new],
132 );
133 }
134 assert_eq!(old_text, new_text);
135 }
136
137 let subscription_edits = subscription.consume();
138 log::info!(
139 "applying subscription edits since version {:?} to old text: {:?}: {:?}",
140 old_buffer.version(),
141 old_buffer.text(),
142 subscription_edits,
143 );
144
145 let mut text = old_buffer.visible_text.clone();
146 for edit in subscription_edits.into_inner() {
147 let new_text: String = buffer.text_for_range(edit.new.clone()).collect();
148 text.replace(edit.new.start..edit.new.start + edit.old.len(), &new_text);
149 }
150 assert_eq!(text.to_string(), buffer.text());
151 }
152}
153
154#[test]
155fn test_line_endings() {
156 assert_eq!(LineEnding::detect(&"🍐✅\n".repeat(1000)), LineEnding::Unix);
157 assert_eq!(LineEnding::detect(&"abcd\n".repeat(1000)), LineEnding::Unix);
158 assert_eq!(
159 LineEnding::detect(&"🍐✅\r\n".repeat(1000)),
160 LineEnding::Windows
161 );
162 assert_eq!(
163 LineEnding::detect(&"abcd\r\n".repeat(1000)),
164 LineEnding::Windows
165 );
166
167 let mut buffer = Buffer::new(0, 0, "one\r\ntwo\rthree".into());
168 assert_eq!(buffer.text(), "one\ntwo\nthree");
169 assert_eq!(buffer.line_ending(), LineEnding::Windows);
170 buffer.check_invariants();
171
172 buffer.edit([(buffer.len()..buffer.len(), "\r\nfour")]);
173 buffer.edit([(0..0, "zero\r\n")]);
174 assert_eq!(buffer.text(), "zero\none\ntwo\nthree\nfour");
175 assert_eq!(buffer.line_ending(), LineEnding::Windows);
176 buffer.check_invariants();
177}
178
179#[test]
180fn test_line_len() {
181 let mut buffer = Buffer::new(0, 0, "".into());
182 buffer.edit([(0..0, "abcd\nefg\nhij")]);
183 buffer.edit([(12..12, "kl\nmno")]);
184 buffer.edit([(18..18, "\npqrs\n")]);
185 buffer.edit([(18..21, "\nPQ")]);
186
187 assert_eq!(buffer.line_len(0), 4);
188 assert_eq!(buffer.line_len(1), 3);
189 assert_eq!(buffer.line_len(2), 5);
190 assert_eq!(buffer.line_len(3), 3);
191 assert_eq!(buffer.line_len(4), 4);
192 assert_eq!(buffer.line_len(5), 0);
193}
194
195#[test]
196fn test_common_prefix_at_positionn() {
197 let text = "a = str; b = δα";
198 let buffer = Buffer::new(0, 0, text.into());
199
200 let offset1 = offset_after(text, "str");
201 let offset2 = offset_after(text, "δα");
202
203 // the preceding word is a prefix of the suggestion
204 assert_eq!(
205 buffer.common_prefix_at(offset1, "string"),
206 range_of(text, "str"),
207 );
208 // a suffix of the preceding word is a prefix of the suggestion
209 assert_eq!(
210 buffer.common_prefix_at(offset1, "tree"),
211 range_of(text, "tr"),
212 );
213 // the preceding word is a substring of the suggestion, but not a prefix
214 assert_eq!(
215 buffer.common_prefix_at(offset1, "astro"),
216 empty_range_after(text, "str"),
217 );
218
219 // prefix matching is case insenstive.
220 assert_eq!(
221 buffer.common_prefix_at(offset1, "Strαngε"),
222 range_of(text, "str"),
223 );
224 assert_eq!(
225 buffer.common_prefix_at(offset2, "ΔΑΜΝ"),
226 range_of(text, "δα"),
227 );
228
229 fn offset_after(text: &str, part: &str) -> usize {
230 text.find(part).unwrap() + part.len()
231 }
232
233 fn empty_range_after(text: &str, part: &str) -> Range<usize> {
234 let offset = offset_after(text, part);
235 offset..offset
236 }
237
238 fn range_of(text: &str, part: &str) -> Range<usize> {
239 let start = text.find(part).unwrap();
240 start..start + part.len()
241 }
242}
243
244#[test]
245fn test_text_summary_for_range() {
246 let buffer = Buffer::new(0, 0, "ab\nefg\nhklm\nnopqrs\ntuvwxyz".into());
247 assert_eq!(
248 buffer.text_summary_for_range::<TextSummary, _>(1..3),
249 TextSummary {
250 bytes: 2,
251 lines: Point::new(1, 0),
252 lines_utf16: PointUtf16::new(1, 0),
253 first_line_chars: 1,
254 last_line_chars: 0,
255 longest_row: 0,
256 longest_row_chars: 1,
257 }
258 );
259 assert_eq!(
260 buffer.text_summary_for_range::<TextSummary, _>(1..12),
261 TextSummary {
262 bytes: 11,
263 lines: Point::new(3, 0),
264 lines_utf16: PointUtf16::new(3, 0),
265 first_line_chars: 1,
266 last_line_chars: 0,
267 longest_row: 2,
268 longest_row_chars: 4,
269 }
270 );
271 assert_eq!(
272 buffer.text_summary_for_range::<TextSummary, _>(0..20),
273 TextSummary {
274 bytes: 20,
275 lines: Point::new(4, 1),
276 lines_utf16: PointUtf16::new(4, 1),
277 first_line_chars: 2,
278 last_line_chars: 1,
279 longest_row: 3,
280 longest_row_chars: 6,
281 }
282 );
283 assert_eq!(
284 buffer.text_summary_for_range::<TextSummary, _>(0..22),
285 TextSummary {
286 bytes: 22,
287 lines: Point::new(4, 3),
288 lines_utf16: PointUtf16::new(4, 3),
289 first_line_chars: 2,
290 last_line_chars: 3,
291 longest_row: 3,
292 longest_row_chars: 6,
293 }
294 );
295 assert_eq!(
296 buffer.text_summary_for_range::<TextSummary, _>(7..22),
297 TextSummary {
298 bytes: 15,
299 lines: Point::new(2, 3),
300 lines_utf16: PointUtf16::new(2, 3),
301 first_line_chars: 4,
302 last_line_chars: 3,
303 longest_row: 1,
304 longest_row_chars: 6,
305 }
306 );
307}
308
309#[test]
310fn test_chars_at() {
311 let mut buffer = Buffer::new(0, 0, "".into());
312 buffer.edit([(0..0, "abcd\nefgh\nij")]);
313 buffer.edit([(12..12, "kl\nmno")]);
314 buffer.edit([(18..18, "\npqrs")]);
315 buffer.edit([(18..21, "\nPQ")]);
316
317 let chars = buffer.chars_at(Point::new(0, 0));
318 assert_eq!(chars.collect::<String>(), "abcd\nefgh\nijkl\nmno\nPQrs");
319
320 let chars = buffer.chars_at(Point::new(1, 0));
321 assert_eq!(chars.collect::<String>(), "efgh\nijkl\nmno\nPQrs");
322
323 let chars = buffer.chars_at(Point::new(2, 0));
324 assert_eq!(chars.collect::<String>(), "ijkl\nmno\nPQrs");
325
326 let chars = buffer.chars_at(Point::new(3, 0));
327 assert_eq!(chars.collect::<String>(), "mno\nPQrs");
328
329 let chars = buffer.chars_at(Point::new(4, 0));
330 assert_eq!(chars.collect::<String>(), "PQrs");
331
332 // Regression test:
333 let mut buffer = Buffer::new(0, 0, "".into());
334 buffer.edit([(0..0, "[workspace]\nmembers = [\n \"xray_core\",\n \"xray_server\",\n \"xray_cli\",\n \"xray_wasm\",\n]\n")]);
335 buffer.edit([(60..60, "\n")]);
336
337 let chars = buffer.chars_at(Point::new(6, 0));
338 assert_eq!(chars.collect::<String>(), " \"xray_wasm\",\n]\n");
339}
340
341#[test]
342fn test_anchors() {
343 let mut buffer = Buffer::new(0, 0, "".into());
344 buffer.edit([(0..0, "abc")]);
345 let left_anchor = buffer.anchor_before(2);
346 let right_anchor = buffer.anchor_after(2);
347
348 buffer.edit([(1..1, "def\n")]);
349 assert_eq!(buffer.text(), "adef\nbc");
350 assert_eq!(left_anchor.to_offset(&buffer), 6);
351 assert_eq!(right_anchor.to_offset(&buffer), 6);
352 assert_eq!(left_anchor.to_point(&buffer), Point { row: 1, column: 1 });
353 assert_eq!(right_anchor.to_point(&buffer), Point { row: 1, column: 1 });
354
355 buffer.edit([(2..3, "")]);
356 assert_eq!(buffer.text(), "adf\nbc");
357 assert_eq!(left_anchor.to_offset(&buffer), 5);
358 assert_eq!(right_anchor.to_offset(&buffer), 5);
359 assert_eq!(left_anchor.to_point(&buffer), Point { row: 1, column: 1 });
360 assert_eq!(right_anchor.to_point(&buffer), Point { row: 1, column: 1 });
361
362 buffer.edit([(5..5, "ghi\n")]);
363 assert_eq!(buffer.text(), "adf\nbghi\nc");
364 assert_eq!(left_anchor.to_offset(&buffer), 5);
365 assert_eq!(right_anchor.to_offset(&buffer), 9);
366 assert_eq!(left_anchor.to_point(&buffer), Point { row: 1, column: 1 });
367 assert_eq!(right_anchor.to_point(&buffer), Point { row: 2, column: 0 });
368
369 buffer.edit([(7..9, "")]);
370 assert_eq!(buffer.text(), "adf\nbghc");
371 assert_eq!(left_anchor.to_offset(&buffer), 5);
372 assert_eq!(right_anchor.to_offset(&buffer), 7);
373 assert_eq!(left_anchor.to_point(&buffer), Point { row: 1, column: 1 },);
374 assert_eq!(right_anchor.to_point(&buffer), Point { row: 1, column: 3 });
375
376 // Ensure anchoring to a point is equivalent to anchoring to an offset.
377 assert_eq!(
378 buffer.anchor_before(Point { row: 0, column: 0 }),
379 buffer.anchor_before(0)
380 );
381 assert_eq!(
382 buffer.anchor_before(Point { row: 0, column: 1 }),
383 buffer.anchor_before(1)
384 );
385 assert_eq!(
386 buffer.anchor_before(Point { row: 0, column: 2 }),
387 buffer.anchor_before(2)
388 );
389 assert_eq!(
390 buffer.anchor_before(Point { row: 0, column: 3 }),
391 buffer.anchor_before(3)
392 );
393 assert_eq!(
394 buffer.anchor_before(Point { row: 1, column: 0 }),
395 buffer.anchor_before(4)
396 );
397 assert_eq!(
398 buffer.anchor_before(Point { row: 1, column: 1 }),
399 buffer.anchor_before(5)
400 );
401 assert_eq!(
402 buffer.anchor_before(Point { row: 1, column: 2 }),
403 buffer.anchor_before(6)
404 );
405 assert_eq!(
406 buffer.anchor_before(Point { row: 1, column: 3 }),
407 buffer.anchor_before(7)
408 );
409 assert_eq!(
410 buffer.anchor_before(Point { row: 1, column: 4 }),
411 buffer.anchor_before(8)
412 );
413
414 // Comparison between anchors.
415 let anchor_at_offset_0 = buffer.anchor_before(0);
416 let anchor_at_offset_1 = buffer.anchor_before(1);
417 let anchor_at_offset_2 = buffer.anchor_before(2);
418
419 assert_eq!(
420 anchor_at_offset_0.cmp(&anchor_at_offset_0, &buffer),
421 Ordering::Equal
422 );
423 assert_eq!(
424 anchor_at_offset_1.cmp(&anchor_at_offset_1, &buffer),
425 Ordering::Equal
426 );
427 assert_eq!(
428 anchor_at_offset_2.cmp(&anchor_at_offset_2, &buffer),
429 Ordering::Equal
430 );
431
432 assert_eq!(
433 anchor_at_offset_0.cmp(&anchor_at_offset_1, &buffer),
434 Ordering::Less
435 );
436 assert_eq!(
437 anchor_at_offset_1.cmp(&anchor_at_offset_2, &buffer),
438 Ordering::Less
439 );
440 assert_eq!(
441 anchor_at_offset_0.cmp(&anchor_at_offset_2, &buffer),
442 Ordering::Less
443 );
444
445 assert_eq!(
446 anchor_at_offset_1.cmp(&anchor_at_offset_0, &buffer),
447 Ordering::Greater
448 );
449 assert_eq!(
450 anchor_at_offset_2.cmp(&anchor_at_offset_1, &buffer),
451 Ordering::Greater
452 );
453 assert_eq!(
454 anchor_at_offset_2.cmp(&anchor_at_offset_0, &buffer),
455 Ordering::Greater
456 );
457}
458
459#[test]
460fn test_anchors_at_start_and_end() {
461 let mut buffer = Buffer::new(0, 0, "".into());
462 let before_start_anchor = buffer.anchor_before(0);
463 let after_end_anchor = buffer.anchor_after(0);
464
465 buffer.edit([(0..0, "abc")]);
466 assert_eq!(buffer.text(), "abc");
467 assert_eq!(before_start_anchor.to_offset(&buffer), 0);
468 assert_eq!(after_end_anchor.to_offset(&buffer), 3);
469
470 let after_start_anchor = buffer.anchor_after(0);
471 let before_end_anchor = buffer.anchor_before(3);
472
473 buffer.edit([(3..3, "def")]);
474 buffer.edit([(0..0, "ghi")]);
475 assert_eq!(buffer.text(), "ghiabcdef");
476 assert_eq!(before_start_anchor.to_offset(&buffer), 0);
477 assert_eq!(after_start_anchor.to_offset(&buffer), 3);
478 assert_eq!(before_end_anchor.to_offset(&buffer), 6);
479 assert_eq!(after_end_anchor.to_offset(&buffer), 9);
480}
481
482#[test]
483fn test_undo_redo() {
484 let mut buffer = Buffer::new(0, 0, "1234".into());
485 // Set group interval to zero so as to not group edits in the undo stack.
486 buffer.history.group_interval = Duration::from_secs(0);
487
488 buffer.edit([(1..1, "abx")]);
489 buffer.edit([(3..4, "yzef")]);
490 buffer.edit([(3..5, "cd")]);
491 assert_eq!(buffer.text(), "1abcdef234");
492
493 let entries = buffer.history.undo_stack.clone();
494 assert_eq!(entries.len(), 3);
495
496 buffer.undo_or_redo(entries[0].transaction.clone()).unwrap();
497 assert_eq!(buffer.text(), "1cdef234");
498 buffer.undo_or_redo(entries[0].transaction.clone()).unwrap();
499 assert_eq!(buffer.text(), "1abcdef234");
500
501 buffer.undo_or_redo(entries[1].transaction.clone()).unwrap();
502 assert_eq!(buffer.text(), "1abcdx234");
503 buffer.undo_or_redo(entries[2].transaction.clone()).unwrap();
504 assert_eq!(buffer.text(), "1abx234");
505 buffer.undo_or_redo(entries[1].transaction.clone()).unwrap();
506 assert_eq!(buffer.text(), "1abyzef234");
507 buffer.undo_or_redo(entries[2].transaction.clone()).unwrap();
508 assert_eq!(buffer.text(), "1abcdef234");
509
510 buffer.undo_or_redo(entries[2].transaction.clone()).unwrap();
511 assert_eq!(buffer.text(), "1abyzef234");
512 buffer.undo_or_redo(entries[0].transaction.clone()).unwrap();
513 assert_eq!(buffer.text(), "1yzef234");
514 buffer.undo_or_redo(entries[1].transaction.clone()).unwrap();
515 assert_eq!(buffer.text(), "1234");
516}
517
518#[test]
519fn test_history() {
520 let mut now = Instant::now();
521 let mut buffer = Buffer::new(0, 0, "123456".into());
522
523 buffer.start_transaction_at(now);
524 buffer.edit([(2..4, "cd")]);
525 buffer.end_transaction_at(now);
526 assert_eq!(buffer.text(), "12cd56");
527
528 buffer.start_transaction_at(now);
529 buffer.edit([(4..5, "e")]);
530 buffer.end_transaction_at(now).unwrap();
531 assert_eq!(buffer.text(), "12cde6");
532
533 now += buffer.history.group_interval + Duration::from_millis(1);
534 buffer.start_transaction_at(now);
535 buffer.edit([(0..1, "a")]);
536 buffer.edit([(1..1, "b")]);
537 buffer.end_transaction_at(now).unwrap();
538 assert_eq!(buffer.text(), "ab2cde6");
539
540 // Last transaction happened past the group interval, undo it on its own.
541 buffer.undo();
542 assert_eq!(buffer.text(), "12cde6");
543
544 // First two transactions happened within the group interval, undo them together.
545 buffer.undo();
546 assert_eq!(buffer.text(), "123456");
547
548 // Redo the first two transactions together.
549 buffer.redo();
550 assert_eq!(buffer.text(), "12cde6");
551
552 // Redo the last transaction on its own.
553 buffer.redo();
554 assert_eq!(buffer.text(), "ab2cde6");
555
556 buffer.start_transaction_at(now);
557 assert!(buffer.end_transaction_at(now).is_none());
558 buffer.undo();
559 assert_eq!(buffer.text(), "12cde6");
560
561 // Redo stack gets cleared after performing an edit.
562 buffer.edit([(0..0, "X")]);
563 assert_eq!(buffer.text(), "X12cde6");
564 buffer.redo();
565 assert_eq!(buffer.text(), "X12cde6");
566 buffer.undo();
567 assert_eq!(buffer.text(), "12cde6");
568 buffer.undo();
569 assert_eq!(buffer.text(), "123456");
570}
571
572#[test]
573fn test_finalize_last_transaction() {
574 let now = Instant::now();
575 let mut buffer = Buffer::new(0, 0, "123456".into());
576
577 buffer.start_transaction_at(now);
578 buffer.edit([(2..4, "cd")]);
579 buffer.end_transaction_at(now);
580 assert_eq!(buffer.text(), "12cd56");
581
582 buffer.finalize_last_transaction();
583 buffer.start_transaction_at(now);
584 buffer.edit([(4..5, "e")]);
585 buffer.end_transaction_at(now).unwrap();
586 assert_eq!(buffer.text(), "12cde6");
587
588 buffer.start_transaction_at(now);
589 buffer.edit([(0..1, "a")]);
590 buffer.edit([(1..1, "b")]);
591 buffer.end_transaction_at(now).unwrap();
592 assert_eq!(buffer.text(), "ab2cde6");
593
594 buffer.undo();
595 assert_eq!(buffer.text(), "12cd56");
596
597 buffer.undo();
598 assert_eq!(buffer.text(), "123456");
599
600 buffer.redo();
601 assert_eq!(buffer.text(), "12cd56");
602
603 buffer.redo();
604 assert_eq!(buffer.text(), "ab2cde6");
605}
606
607#[test]
608fn test_edited_ranges_for_transaction() {
609 let now = Instant::now();
610 let mut buffer = Buffer::new(0, 0, "1234567".into());
611
612 buffer.start_transaction_at(now);
613 buffer.edit([(2..4, "cd")]);
614 buffer.edit([(6..6, "efg")]);
615 buffer.end_transaction_at(now);
616 assert_eq!(buffer.text(), "12cd56efg7");
617
618 let tx = buffer.finalize_last_transaction().unwrap().clone();
619 assert_eq!(
620 buffer
621 .edited_ranges_for_transaction::<usize>(&tx)
622 .collect::<Vec<_>>(),
623 [2..4, 6..9]
624 );
625
626 buffer.edit([(5..5, "hijk")]);
627 assert_eq!(buffer.text(), "12cd5hijk6efg7");
628 assert_eq!(
629 buffer
630 .edited_ranges_for_transaction::<usize>(&tx)
631 .collect::<Vec<_>>(),
632 [2..4, 10..13]
633 );
634
635 buffer.edit([(4..4, "l")]);
636 assert_eq!(buffer.text(), "12cdl5hijk6efg7");
637 assert_eq!(
638 buffer
639 .edited_ranges_for_transaction::<usize>(&tx)
640 .collect::<Vec<_>>(),
641 [2..4, 11..14]
642 );
643}
644
645#[test]
646fn test_concurrent_edits() {
647 let text = "abcdef";
648
649 let mut buffer1 = Buffer::new(1, 0, text.into());
650 let mut buffer2 = Buffer::new(2, 0, text.into());
651 let mut buffer3 = Buffer::new(3, 0, text.into());
652
653 let buf1_op = buffer1.edit([(1..2, "12")]);
654 assert_eq!(buffer1.text(), "a12cdef");
655 let buf2_op = buffer2.edit([(3..4, "34")]);
656 assert_eq!(buffer2.text(), "abc34ef");
657 let buf3_op = buffer3.edit([(5..6, "56")]);
658 assert_eq!(buffer3.text(), "abcde56");
659
660 buffer1.apply_op(buf2_op.clone()).unwrap();
661 buffer1.apply_op(buf3_op.clone()).unwrap();
662 buffer2.apply_op(buf1_op.clone()).unwrap();
663 buffer2.apply_op(buf3_op.clone()).unwrap();
664 buffer3.apply_op(buf1_op.clone()).unwrap();
665 buffer3.apply_op(buf2_op.clone()).unwrap();
666
667 assert_eq!(buffer1.text(), "a12c34e56");
668 assert_eq!(buffer2.text(), "a12c34e56");
669 assert_eq!(buffer3.text(), "a12c34e56");
670}
671
672#[gpui::test(iterations = 100)]
673fn test_random_concurrent_edits(mut rng: StdRng) {
674 let peers = env::var("PEERS")
675 .map(|i| i.parse().expect("invalid `PEERS` variable"))
676 .unwrap_or(5);
677 let operations = env::var("OPERATIONS")
678 .map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
679 .unwrap_or(10);
680
681 let base_text_len = rng.gen_range(0..10);
682 let base_text = RandomCharIter::new(&mut rng)
683 .take(base_text_len)
684 .collect::<String>();
685 let mut replica_ids = Vec::new();
686 let mut buffers = Vec::new();
687 let mut network = Network::new(rng.clone());
688
689 for i in 0..peers {
690 let mut buffer = Buffer::new(i as ReplicaId, 0, base_text.clone().into());
691 buffer.history.group_interval = Duration::from_millis(rng.gen_range(0..=200));
692 buffers.push(buffer);
693 replica_ids.push(i as u16);
694 network.add_peer(i as u16);
695 }
696
697 log::info!("initial text: {:?}", base_text);
698
699 let mut mutation_count = operations;
700 loop {
701 let replica_index = rng.gen_range(0..peers);
702 let replica_id = replica_ids[replica_index];
703 let buffer = &mut buffers[replica_index];
704 match rng.gen_range(0..=100) {
705 0..=50 if mutation_count != 0 => {
706 let op = buffer.randomly_edit(&mut rng, 5).1;
707 network.broadcast(buffer.replica_id, vec![op]);
708 log::info!("buffer {} text: {:?}", buffer.replica_id, buffer.text());
709 mutation_count -= 1;
710 }
711 51..=70 if mutation_count != 0 => {
712 let ops = buffer.randomly_undo_redo(&mut rng);
713 network.broadcast(buffer.replica_id, ops);
714 mutation_count -= 1;
715 }
716 71..=100 if network.has_unreceived(replica_id) => {
717 let ops = network.receive(replica_id);
718 if !ops.is_empty() {
719 log::info!(
720 "peer {} applying {} ops from the network.",
721 replica_id,
722 ops.len()
723 );
724 buffer.apply_ops(ops).unwrap();
725 }
726 }
727 _ => {}
728 }
729 buffer.check_invariants();
730
731 if mutation_count == 0 && network.is_idle() {
732 break;
733 }
734 }
735
736 let first_buffer = &buffers[0];
737 for buffer in &buffers[1..] {
738 assert_eq!(
739 buffer.text(),
740 first_buffer.text(),
741 "Replica {} text != Replica 0 text",
742 buffer.replica_id
743 );
744 buffer.check_invariants();
745 }
746}