@Override
              public String description() {
                return "Client expected to get " + MAX_ENTRIES + " creates, but got "
                    + initialCreatesListener.numCreates.get();
              }
tests for the concurrentMapOperations. there are more tests in ClientServerMiscDUnitTest
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ConcurrentMapOpsDUnitTest.java