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Walkthrough
The recent changes address tree structure and size consistency in the TreeNode and Node structs within the document collaboration system. Updates simplify ancestor size management, modify descendant size handling, and introduce new test cases to ensure tree consistency during concurrent edits. Additionally, debug print statements have been added to the ApplyChanges function for specific index values.
Changes
| Files | Change Summary |
|---|---|
pkg/document/crdt/tree.go |
Simplified logic in TreeNode's remove method for updating ancestors' size and parent's length. |
pkg/document/internal_document.go |
Added fmt import and a debug print statement in ApplyChanges for index 158. |
pkg/index/tree.go |
Updated UpdateAncestorsSize to break loop if parent's value is removed; modified UpdateDescendantsSize to skip removed nodes. |
test/integration/tree_test.go |
Added imports for converter and crdt packages; introduced new test cases for concurrent editing and tree consistency. |
Sequence Diagram(s) (Beta)
No sequence diagrams provided as the changes are primarily logical simplifications and enhancements.
Assessment against linked issues
| Objective (Issue #889) | Addressed | Explanation |
|---|---|---|
Ensure size for index calculation in XML Tree is consistent |
✅ | |
Ensure attributes of Trees generated by Changes and Snapshot match |
✅ |
Poem
In the code, the trees now stand, Ancestors' sizes, simplified, grand. Descendants skip the nodes removed, A smoother process, finely tuned. Debug prints for index keen, Collaboration flows, pristine. 🌳✨
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codecov[bot]
hackerwins
What this PR does / why we need it?
Fix miscalculation of tree size in concurrent editing
This commit addresses the issue where the
updateAncestorsSizemethod subtracts the size of a tombstoned node from its ancestors' sizes when the node is removed. However, the previous logic did not consider cases where ancestors node are tombstoned. In such cases, the update should not propagate to the parent's ancestors. This commit introduces recursive checks on ancestors and stops updating process if a tombstoned ancestor is encountered.Furthermore, the PR ensures consistency between the size maintenance policies of updateDescendantsSize and updateAncestorsSize.
Any background context you want to provide?
What are the relevant tickets?
Address https://github.com/yorkie-team/yorkie/issues/889 Related to https://github.com/yorkie-team/yorkie-js-sdk/pull/846
Checklist:
Summary by CodeRabbit
Bug Fixes
Tests