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61455b6191
The main change here from the previous test framework design is: 1. Powerloss testing remains in-process, speeding up testing. 2. The state of a test, included all powerlosses, is encoded in the test id + leb16 encoded powerloss string. This means exhaustive testing can be run in CI, but then easily reproduced locally with full debugger support. For example: ./scripts/test.py test_dirs#reentrant_many_dir#10#1248g1g2 --gdb Will run the test test_dir, case reentrant_many_dir, permutation #10, with powerlosses at 1, 2, 4, 8, 16, and 32 cycles. Dropping into gdb if an assert fails. The changes to the block-device are a work-in-progress for a lazily-allocated/copy-on-write block device that I'm hoping will keep exhaustive testing relatively low-cost.