Just for the record, LMDB uses both random testing as well as explicitly targeted test cases. (I.e., we construct a DB with specific data in specific sequences

Just for the record, LMDB uses both random testing as well as explicitly targeted test cases. (I.e., we construct a DB with specific data in specific sequences to trigger splits and rebalances, etc.) Test coverage is over 90%, with the remainder being auxiliary and platform-specific code. (I.e., we cannot get 100% coverage on any single box due to segments of the code that are #ifdef'd for some other platform.)