import static com.google.common.truth.Truth.assertThat;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertThrows;

import com.google.common.cache.CacheLoader.InvalidCacheLoadException;
import com.google.common.cache.TestingRemovalListeners.QueuingRemovalListener;
import com.google.common.util.concurrent.UncheckedExecutionException;
import junit.framework.TestCase;

/**

import static com.google.common.truth.Truth.assertThat;
import static java.util.concurrent.TimeUnit.SECONDS;
import static org.junit.Assert.assertThrows;

import com.google.common.cache.CacheLoader.InvalidCacheLoadException;
import com.google.common.cache.TestingRemovalListeners.QueuingRemovalListener;
import com.google.common.util.concurrent.UncheckedExecutionException;
import junit.framework.TestCase;

/**

    assertEquals(0, stats.hitCount());

    assertThrows(InvalidCacheLoadException.class, () -> cache.get(new Object()));
    stats = cache.stats();
    assertEquals(1, stats.missCount());
    assertEquals(0, stats.loadSuccessCount());
    assertEquals(1, stats.loadExceptionCount());
    assertEquals(0, stats.hitCount());

    assertThrows(InvalidCacheLoadException.class, () -> cache.getUnchecked(new Object()));

import com.google.common.cache.AbstractCache.StatsCounter;
import com.google.common.cache.CacheBuilder.NullListener;
import com.google.common.cache.CacheBuilder.OneWeigher;
import com.google.common.cache.CacheLoader.InvalidCacheLoadException;
import com.google.common.cache.CacheLoader.UnsupportedLoadingOperationException;
import com.google.common.collect.AbstractSequentialIterator;
import com.google.common.collect.ImmutableMap;

      throw new ExecutionError(e);
    }

    if (calculatedValue == null) {
      String message = loader + " returned null for key " + key + ".";
      throw new CacheLoader.InvalidCacheLoadException(message);
    }
    statsCounter.recordLoadSuccess(ticker.read() - startTime);
    return calculatedValue;
  }

  private V getIfPresent(Object key) {
    checkNotNull(key);