testlib: add tests for ConcurrentMap to make sure its derived Sets are concurrent #7855
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testlib: add tests for
ConcurrentMap to make sure its derived Sets are concurrent #7855
map.entrySet().stream().toList()should return the same elementsspliterator().characteristics()should probably align with map/set characteristic. For instance, if the map permits nulls, and there are nulls, thenSpliterator.NONNULLdoes not sound right.See ben-manes/caffeine#1883