public static void setTestBytesUsedForThresholdSet(final long newTestBytesUsedForThresholdSet) {
    testBytesUsedForThresholdSet = newTestBytesUsedForThresholdSet;
  }
Since the setter methods for the eviction and critical thresholds immediately update state
based upon the new threshold value and the number of bytes currently used by the JVM, there
needs to be a way to override the number of bytes of memory reported as in use for testing.
That's what this method and the value it sets are for.

@param newTestBytesUsedForThresholdSet Value to use as the amount of memory in use when calling
       the setEvictionThreshold or setCriticalThreshold methods are called.
geode-core/src/main/java/org/apache/geode/internal/cache/control/HeapMemoryMonitor.java