Norman Maurer 4d681bfc6f
Fix test-error which was introduced by porting tests to junit5 (#11330)
Motivation:

b89a807d15fd925c21d3c875836145cd5302c8c9 moved the buffer tests to junit5 but introduced a small error which could lead to test-failure

Modifications:

Correctly override the method and assert that super throws (as we can not expand the buffer).

Result:

No more test failures
2021-05-28 09:26:51 +02:00
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