public void testEmptySimpleStats() {
StatsCounter counter = new SimpleStatsCounter();
CacheStats stats = counter.snapshot();
assertEquals(0, stats.requestCount());
assertEquals(0, stats.hitCount());
assertEquals(1.0, stats.hitRate());
assertEquals(0, stats.missCount());
assertEquals(0.0, stats.missRate());
assertEquals(0, stats.loadSuccessCount());
assertEquals(0, stats.loadExceptionCount());
assertEquals(0, stats.loadCount());
assertEquals(0, stats.totalLoadTime());
assertEquals(0.0, stats.averageLoadPenalty());
assertEquals(0, stats.evictionCount());
}
public void testSingleSimpleStats() {
StatsCounter counter = new SimpleStatsCounter();
for (int i = 0; i < 11; i++) {
counter.recordHits(1);
}
for (int i = 0; i < 13; i++) {
counter.recordLoadSuccess(i);
}
for (int i = 0; i < 17; i++) {
counter.recordLoadException(i);
}
for (int i = 0; i < 23; i++) {
counter.recordMisses(1);
}
for (int i = 0; i < 27; i++) {
counter.recordEviction();
}
CacheStats stats = counter.snapshot();
int requestCount = 11 + 23;
assertEquals(requestCount, stats.requestCount());
assertEquals(11, stats.hitCount());
assertEquals(11.0 / requestCount, stats.hitRate());
int missCount = 23;
assertEquals(missCount, stats.missCount());
assertEquals(((double) missCount) / requestCount, stats.missRate());
assertEquals(13, stats.loadSuccessCount());
assertEquals(17, stats.loadExceptionCount());
assertEquals(13 + 17, stats.loadCount());
assertEquals(214, stats.totalLoadTime());
assertEquals(214.0 / (13 + 17), stats.averageLoadPenalty());
assertEquals(27, stats.evictionCount());
}