private HStore createMockStore() {
    HStore s = mock(HStore.class);
    when(s.getStoreFileTtl()).thenReturn(Long.MAX_VALUE);
    when(s.getBlockingFileCount()).thenReturn(7L);
    when(s.getRegionInfo()).thenReturn(RegionInfoBuilder.FIRST_META_REGIONINFO);
    return s;
  }
Test the perf of a CompactionPolicy with settings.
@param cpClass The compaction policy to test
@param inMmax  The maximum number of file to compact
@param inMin   The min number of files to compact
@param inRatio The ratio that files must be under to be compacted.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/compactions/PerfTestCompactionPolicies.java