Michael Beckerle created DAFFODIL-1947:
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Summary: TDMLRunner - incorrect error on left-over data:
TDMLException: Left over data. Consumed 48 bit(s) with 0 bit(s) remaining.
Key: DAFFODIL-1947
URL: https://issues.apache.org/jira/browse/DAFFODIL-1947
Project: Daffodil
Issue Type: Bug
Components: TDML Runner
Affects Versions: 2.1.0
Reporter: Michael Beckerle
Fix For: 2.2.0
When a test runs round trip, if the test parse succeeds, but the unparse
creates an extra character in the output, on reparse we get a left-over-data
error, but the error message is bogus because it says 0 bits remaining, which
makes no sense for left-over data.
org.apache.daffodil.tdml.TDMLException: Left over data. Consumed 48 bit(s) with
0 bit(s) remaining.
In general, the round-trip logic should be a bit smarter. The output should
indicate what phase of the test it was in when the failure occurred. In this
specific case, the unparsed output doesn't match the size of the original
input. That might be ok on round trip, but in most cases we want parse/unparse
to work without having to reparse.
We need to fix the bug so that this doesn't report incorrect left-over-data
info. We also need to change roundTrip to have a mode for one-pass only,
meaning that the unparse is expected to create exactly the same as the input
data (for parse tests), so that it should not try to reparse the unparsed
output, but should immediately report the error.
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