{"id":"repo-test-helpers-use-leetcode-serialization","text":"Test helpers like `_build(vals)` and `_to_list(root)` use BFS-based level-order serialization matching LeetCode's own tree encoding format, with `None` entries representing missing children.","truth_value":"IN","source":"entries/2026/06/06/search-in-a-binary-search-tree-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"repo-test-helpers-use-leetcode-serialization","truth_value":"IN","reason":"premise"}]}}