We need to test the live import of files and incremental backup. Adding a new imported table to the database while the database is tracking changes via incremental is not currently tested and we need to make sure the file is detected, backed up and changes noted, etc.

There are three major programs that test incremental backup:

1. Python test suite. We should add a test that checks basic functionality. Current incremental backup tests are test_backup11.py and later.
2. test/csuite/incr_backup is a randomized test that performs other schema operations like create and drop during incremental backup. It would be desired to get import into here as one of the random operations the test does.
3. test/format has incremental backup support. I do not know if it has import support. I think it only operates on a single table so it may not be relevant. If it is not testing import then it is likely a much larger task to get it working here. If it does test import then we may already be getting some coverage.