filter_parser: reorganize tests for abnormal cases #4638
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Which issue(s) this PR fixes:
None.
What this PR does / why we need it:
Adds and reorganizes tests of
filter_parser
for abnormal cases.The following PR will significantly change the implementation of
filter_parser
.However, currently, there aren't enough tests for abnormal cases.
This condition makes it difficult to safely make such a large change.
This PR solves the problem.
Docs Changes:
Not needed.
Release Note:
Same as the title.
(Or not needed because this changes only the test codes.)