test: add test of batch reuse semantics #67
Merged
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This tests that a closed batch can be reused as if it were a new one. It is unclear if this is the semantics we want, the alternative is to panic/error on reuse. The latter option might be better for safety, but many of the current backends allow the former so it is less breaking.
Personally I don't have a strong opinion, we just have to choose one or the other.