[TAJO-1803] Use in-memory derby as the default catalog for unit tests

• Type: Task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.11.0
• Component/s: Unit Test
• Assignee: Jihoon Son
• Reporter: Jihoon Son
• Due: 28/Aug/15
• Created: 26/Aug/15 02:35
• Updated: 01/Sep/15 13:05
• Resolved: 01/Sep/15 13:03

Description

We are currently using MemStore which is designed to provide the same interface with AbstractDBStore. This incurs two problems.

• The major problem is that AbstractDBStore is not tested properly by unit testing. The logic to access catalog is separated into MemStore and AbstractDBStore, and only MemStore is tested.
• We have to implement both AbstractDBStore and MemStore whenever we modify the catalog interface even though MemStore is used only in unit testing. This is an unnecessary burden to developers.