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Correctly defer undo operations when messages arrive out of order

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Co-Authored-By: Nathan Sobo <nathan@zed.dev>
Co-Authored-By: Max Brunsfeld <max@zed.dev>
This commit is contained in:
Antonio Scandurra 2022-03-03 18:07:59 +01:00
parent 410ee124af
commit 556d9cc53f
5 changed files with 31 additions and 31 deletions
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19
crates/util/src/test.rs
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@ -40,23 +40,10 @@ impl<T: Clone, R: rand::Rng> Network<T, R> {
for (replica, inbox) in self.inboxes.iter_mut() {
if *replica != sender {
for message in &messages {
let min_index = inbox
.iter()
.enumerate()
.rev()
.find_map(|(index, envelope)| {
if sender == envelope.sender {
Some(index + 1)
} else {
None
}
})
.unwrap_or(0);
// Insert one or more duplicates of this message *after* the previous
// message delivered by this replica.
// Insert one or more duplicates of this message, potentially *before* the previous
// message sent by this peer to simulate out-of-order delivery.
for _ in 0..self.rng.gen_range(1..4) {
let insertion_index = self.rng.gen_range(min_index..inbox.len() + 1);
let insertion_index = self.rng.gen_range(0..inbox.len() + 1);
inbox.insert(
insertion_index,
Envelope {