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chain-selection: allow reverting current block (#4103)

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Block reversion of the current block is technically possible as can be
seen from

https://github.com/paritytech/polkadot-sdk/blob/39b1f50f1c251def87c1625d68567ed252dc6272/polkadot/runtime/parachains/src/disputes.rs#L1215-L1223

- [x] Fix the test
This commit is contained in:
ordian
2024-04-18 16:32:14 +02:00
committed by GitHub
parent 4ddeda1e41
commit 91d4a207af
3 changed files with 65 additions and 26 deletions
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polkadot/node/core/chain-selection/src/tests.rs
+39 -4
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@@ -966,19 +966,54 @@ fn ancestor_of_unviable_is_not_leaf_if_has_children() {
}
#[test]
fn self_and_future_reversions_are_ignored() {
fn self_reversions_are_not_ignored() {
test_harness(|backend, _, mut virtual_overseer| async move {
let finalized_number = 0;
let finalized_hash = Hash::repeat_byte(0);
// F <- A1 <- A2 <- A3.
//
// A3 reverts itself and future blocks. ignored.
// A3 reverts itself
let (_, chain_a) =
construct_chain_on_base(vec![1, 2, 3], finalized_number, finalized_hash, |h| {
if h.number == 3 {
add_reversions(h, vec![3])
}
});
let a2_hash = chain_a.iter().rev().nth(1).unwrap().0.hash();
import_blocks_into(
&mut virtual_overseer,
&backend,
Some((finalized_number, finalized_hash)),
chain_a.clone(),
)
.await;
assert_backend_contains(&backend, chain_a.iter().map(|(h, _)| h));
assert_leaves(&backend, vec![a2_hash]);
assert_leaves_query(&mut virtual_overseer, vec![a2_hash]).await;
virtual_overseer
});
}
#[test]
fn future_reversions_are_ignored() {
test_harness(|backend, _, mut virtual_overseer| async move {
let finalized_number = 0;
let finalized_hash = Hash::repeat_byte(0);
// F <- A1 <- A2 <- A3.
//
// A3 reverts future blocks. ignored.
let (a3_hash, chain_a) =
construct_chain_on_base(vec![1, 2, 3], finalized_number, finalized_hash, |h| {
if h.number == 3 {
add_reversions(h, vec![3, 4, 100])
add_reversions(h, vec![4, 100])
}
});
@@ -1006,7 +1041,7 @@ fn revert_finalized_is_ignored() {
// F <- A1 <- A2 <- A3.
//
// A3 reverts itself and future blocks. ignored.
// A3 reverts finalized F and its ancestors. ignored.
let (a3_hash, chain_a) =
construct_chain_on_base(vec![1, 2, 3], finalized_number, finalized_hash, |h| {