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Fix Locator::from_index

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Enhance language::tests::test_random_collaborators so that it checks buffer invariants.

Co-Authored-By: Nathan Sobo <nathan@zed.dev>
This commit is contained in:
Max Brunsfeld 2022-01-05 17:58:24 -08:00
parent e5faaeb2f2
commit f9f75e98f8
4 changed files with 46 additions and 34 deletions
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33
crates/text/src/tests.rs
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@ -602,36 +602,3 @@ fn test_random_concurrent_edits(mut rng: StdRng) {
buffer.check_invariants();
}
}
impl Buffer {
fn check_invariants(&self) {
// Ensure every fragment is ordered by locator in the fragment tree and corresponds
// to an insertion fragment in the insertions tree.
let mut prev_fragment_id = Locator::min();
for fragment in self.snapshot.fragments.items(&None) {
assert!(fragment.id > prev_fragment_id);
prev_fragment_id = fragment.id.clone();
let insertion_fragment = self
.snapshot
.insertions
.get(
&InsertionFragmentKey {
timestamp: fragment.insertion_timestamp.local(),
split_offset: fragment.insertion_offset,
},
&(),
)
.unwrap();
assert_eq!(insertion_fragment.fragment_id, fragment.id);
}
let mut cursor = self.snapshot.fragments.cursor::<Option<&Locator>>();
for insertion_fragment in self.snapshot.insertions.cursor::<()>() {
cursor.seek(&Some(&insertion_fragment.fragment_id), Bias::Left, &None);
let fragment = cursor.item().unwrap();
assert_eq!(insertion_fragment.fragment_id, fragment.id);
assert_eq!(insertion_fragment.split_offset, fragment.insertion_offset);
}
}
}