Examples of FakeTicker

com.google.common.testing.FakeTicker
A Ticker whose value can be advanced programmatically in test.
This class is thread-safe. @author Jige Yu @since Guava release 10
com.twitter.common.util.testing.FakeTicker

Examples of com.google.common.testing.FakeTicker

    assertThat(keySet).containsExactly(6, 7, 8, 9, 0, 3, 4);
  }


  public void testExpirationOrder_writeAccess() throws ExecutionException {
    // test lru within a single segment
    FakeTicker ticker = new FakeTicker();
    IdentityLoader<Integer> loader = identityLoader();
    LoadingCache<Integer, Integer> cache = CacheBuilder.newBuilder()
        .concurrencyLevel(1)
        .expireAfterWrite(5, MILLISECONDS)
        .expireAfterAccess(3, MILLISECONDS)
        .ticker(ticker)
        .build(loader);
    for (int i = 0; i < 5; i++) {
      cache.getUnchecked(i);
    }
    ticker.advance(1, MILLISECONDS);
    for (int i = 5; i < 10; i++) {
      cache.getUnchecked(i);
    }
    ticker.advance(1, MILLISECONDS);


    Set<Integer> keySet = cache.asMap().keySet();
    assertThat(keySet).containsExactly(0, 1, 2, 3, 4, 5, 6, 7, 8, 9);


    // get saves 1, 3; 0, 2, 4 expire
    getAll(cache, asList(1, 3));
    CacheTesting.drainRecencyQueues(cache);
    ticker.advance(1, MILLISECONDS);
    assertThat(keySet).containsExactly(5, 6, 7, 8, 9, 1, 3);


    // get saves 6, 8; 5, 7, 9 expire
    getAll(cache, asList(6, 8));
    CacheTesting.drainRecencyQueues(cache);
    ticker.advance(1, MILLISECONDS);
    assertThat(keySet).containsExactly(1, 3, 6, 8);


    // get fails to save 1, put saves 3
    cache.asMap().put(3, -3);
    getAll(cache, asList(1));
    CacheTesting.drainRecencyQueues(cache);
    ticker.advance(1, MILLISECONDS);
    assertThat(keySet).containsExactly(6, 8, 3);


    // get(K, Callable) fails to save 8, replace saves 6
    cache.asMap().replace(6, -6);
    cache.get(8, Callables.returning(-8));
    CacheTesting.drainRecencyQueues(cache);
    ticker.advance(1, MILLISECONDS);
    assertThat(keySet).containsExactly(3, 6);
  }

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Examples of com.google.common.testing.FakeTicker


    assertTrue(listener.isEmpty());
  }


  public void testRemovalListener_expired() {
    FakeTicker ticker = new FakeTicker();
    QueuingRemovalListener<Object, Object> listener = queuingRemovalListener();
    LocalCache<Object, Object> map = makeLocalCache(createCacheBuilder()
        .concurrencyLevel(1)
        .expireAfterWrite(2, TimeUnit.NANOSECONDS)
        .ticker(ticker)
        .removalListener(listener));
    assertTrue(listener.isEmpty());


    Object one = new Object();
    Object two = new Object();
    Object three = new Object();
    Object four = new Object();
    Object five = new Object();


    map.put(one, two);
    ticker.advance(1);
    map.put(two, three);
    ticker.advance(1);
    map.put(three, four);
    assertTrue(listener.isEmpty());
    ticker.advance(1);
    map.put(four, five);
    assertNotified(listener, one, two, RemovalCause.EXPIRED);


    assertTrue(listener.isEmpty());
  }

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Examples of com.google.common.testing.FakeTicker

      assertSame(two, one.getNextInAccessQueue());
    }
  }


  public void testSegmentGetAndContains() {
    FakeTicker ticker = new FakeTicker();
    LocalCache<Object, Object> map = makeLocalCache(createCacheBuilder()
        .concurrencyLevel(1)
        .ticker(ticker)
        .expireAfterAccess(1, TimeUnit.NANOSECONDS));
    Segment<Object, Object> segment = map.segments[0];
    // TODO(fry): check recency ordering


    Object key = new Object();
    int hash = map.hash(key);
    Object value = new Object();
    AtomicReferenceArray<ReferenceEntry<Object, Object>> table = segment.table;
    int index = hash & (table.length() - 1);


    ReferenceEntry<Object, Object> entry = map.newEntry(key, hash, null);
    ValueReference<Object, Object> valueRef = map.newValueReference(entry, value, 1);
    entry.setValueReference(valueRef);


    assertNull(segment.get(key, hash));


    // count == 0
    table.set(index, entry);
    assertNull(segment.get(key, hash));
    assertFalse(segment.containsKey(key, hash));
    assertFalse(segment.containsValue(value));


    // count == 1
    segment.count++;
    assertSame(value, segment.get(key, hash));
    assertTrue(segment.containsKey(key, hash));
    assertTrue(segment.containsValue(value));
    // don't see absent values now that count > 0
    assertNull(segment.get(new Object(), hash));


    // null key
    DummyEntry<Object, Object> nullEntry = DummyEntry.create(null, hash, entry);
    Object nullValue = new Object();
    ValueReference<Object, Object> nullValueRef = map.newValueReference(nullEntry, nullValue, 1);
    nullEntry.setValueReference(nullValueRef);
    table.set(index, nullEntry);
    // skip the null key
    assertSame(value, segment.get(key, hash));
    assertTrue(segment.containsKey(key, hash));
    assertTrue(segment.containsValue(value));
    assertFalse(segment.containsValue(nullValue));


    // hash collision
    DummyEntry<Object, Object> dummy = DummyEntry.create(new Object(), hash, entry);
    Object dummyValue = new Object();
    ValueReference<Object, Object> dummyValueRef = map.newValueReference(dummy, dummyValue, 1);
    dummy.setValueReference(dummyValueRef);
    table.set(index, dummy);
    assertSame(value, segment.get(key, hash));
    assertTrue(segment.containsKey(key, hash));
    assertTrue(segment.containsValue(value));
    assertTrue(segment.containsValue(dummyValue));


    // key collision
    dummy = DummyEntry.create(key, hash, entry);
    dummyValue = new Object();
    dummyValueRef = map.newValueReference(dummy, dummyValue, 1);
    dummy.setValueReference(dummyValueRef);
    table.set(index, dummy);
    // returns the most recent entry
    assertSame(dummyValue, segment.get(key, hash));
    assertTrue(segment.containsKey(key, hash));
    assertTrue(segment.containsValue(value));
    assertTrue(segment.containsValue(dummyValue));


    // expired
    dummy.setAccessTime(ticker.read() - 2);
    assertNull(segment.get(key, hash));
    assertFalse(segment.containsKey(key, hash));
    assertTrue(segment.containsValue(value));
    assertFalse(segment.containsValue(dummyValue));
  }

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Examples of com.google.common.testing.FakeTicker

      }
    }
  }


  public void testExpireAfterWrite() {
    FakeTicker ticker = new FakeTicker();
    LocalCache<Object, Object> map = makeLocalCache(createCacheBuilder()
        .concurrencyLevel(1)
        .ticker(ticker)
        .expireAfterWrite(1, TimeUnit.NANOSECONDS));
    Segment<Object, Object> segment = map.segments[0];


    Object key = new Object();
    Object value = new Object();
    map.put(key, value);
    ReferenceEntry<Object, Object> entry = map.getEntry(key);
    assertTrue(map.isLive(entry, ticker.read()));


    segment.writeQueue.add(entry);
    assertSame(value, map.get(key));
    assertSame(entry, segment.writeQueue.peek());
    assertEquals(1, segment.writeQueue.size());


    segment.recordRead(entry, ticker.read());
    segment.expireEntries(ticker.read());
    assertSame(value, map.get(key));
    assertSame(entry, segment.writeQueue.peek());
    assertEquals(1, segment.writeQueue.size());


    ticker.advance(1);
    segment.recordRead(entry, ticker.read());
    segment.expireEntries(ticker.read());
    assertSame(value, map.get(key));
    assertSame(entry, segment.writeQueue.peek());
    assertEquals(1, segment.writeQueue.size());


    ticker.advance(1);
    assertNull(map.get(key));
    segment.expireEntries(ticker.read());
    assertNull(map.get(key));
    assertTrue(segment.writeQueue.isEmpty());
  }

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Examples of com.google.common.testing.FakeTicker

    assertNull(map.get(key));
    assertTrue(segment.writeQueue.isEmpty());
  }


  public void testExpireAfterAccess() {
    FakeTicker ticker = new FakeTicker();
    LocalCache<Object, Object> map = makeLocalCache(createCacheBuilder()
        .concurrencyLevel(1)
        .ticker(ticker)
        .expireAfterAccess(1, TimeUnit.NANOSECONDS));
    Segment<Object, Object> segment = map.segments[0];


    Object key = new Object();
    Object value = new Object();
    map.put(key, value);
    ReferenceEntry<Object, Object> entry = map.getEntry(key);
    assertTrue(map.isLive(entry, ticker.read()));


    segment.accessQueue.add(entry);
    assertSame(value, map.get(key));
    assertSame(entry, segment.accessQueue.peek());
    assertEquals(1, segment.accessQueue.size());


    segment.recordRead(entry, ticker.read());
    segment.expireEntries(ticker.read());
    assertTrue(map.containsKey(key));
    assertSame(entry, segment.accessQueue.peek());
    assertEquals(1, segment.accessQueue.size());


    ticker.advance(1);
    segment.recordRead(entry, ticker.read());
    segment.expireEntries(ticker.read());
    assertTrue(map.containsKey(key));
    assertSame(entry, segment.accessQueue.peek());
    assertEquals(1, segment.accessQueue.size());


    ticker.advance(1);
    segment.recordRead(entry, ticker.read());
    segment.expireEntries(ticker.read());
    assertTrue(map.containsKey(key));
    assertSame(entry, segment.accessQueue.peek());
    assertEquals(1, segment.accessQueue.size());


    ticker.advance(1);
    segment.expireEntries(ticker.read());
    assertTrue(map.containsKey(key));
    assertSame(entry, segment.accessQueue.peek());
    assertEquals(1, segment.accessQueue.size());


    ticker.advance(1);
    assertFalse(map.containsKey(key));
    assertNull(map.get(key));
    segment.expireEntries(ticker.read());
    assertFalse(map.containsKey(key));
    assertNull(map.get(key));
    assertTrue(segment.accessQueue.isEmpty());
  }

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Examples of com.google.common.testing.FakeTicker

  private static final long EXPIRING_TIME = 1000;
  private static final int VALUE_PREFIX = 12345;
  private static final String KEY_PREFIX = "key prefix:";


  public void testExpiration_expireAfterWrite() {
    FakeTicker ticker = new FakeTicker();
    CountingRemovalListener<String, Integer> removalListener = countingRemovalListener();
    WatchedCreatorLoader loader = new WatchedCreatorLoader();
    LoadingCache<String, Integer> cache = CacheBuilder.newBuilder()
        .expireAfterWrite(EXPIRING_TIME, MILLISECONDS)
        .removalListener(removalListener)

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Examples of com.google.common.testing.FakeTicker

        .build(loader);
    checkExpiration(cache, loader, ticker, removalListener);
  }


  public void testExpiration_expireAfterAccess() {
    FakeTicker ticker = new FakeTicker();
    CountingRemovalListener<String, Integer> removalListener = countingRemovalListener();
    WatchedCreatorLoader loader = new WatchedCreatorLoader();
    LoadingCache<String, Integer> cache = CacheBuilder.newBuilder()
        .expireAfterAccess(EXPIRING_TIME, MILLISECONDS)
        .removalListener(removalListener)

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Examples of com.google.common.testing.FakeTicker

    assertEquals("Eviction notifications must be received", 10,
        removalListener.getCount());
  }


  public void testExpiringGet_expireAfterWrite() {
    FakeTicker ticker = new FakeTicker();
    CountingRemovalListener<String, Integer> removalListener = countingRemovalListener();
    WatchedCreatorLoader loader = new WatchedCreatorLoader();
    LoadingCache<String, Integer> cache = CacheBuilder.newBuilder()
        .expireAfterWrite(EXPIRING_TIME, MILLISECONDS)
        .removalListener(removalListener)

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Examples of com.google.common.testing.FakeTicker

        .build(loader);
    runExpirationTest(cache, loader, ticker, removalListener);
  }


  public void testExpiringGet_expireAfterAccess() {
    FakeTicker ticker = new FakeTicker();
    CountingRemovalListener<String, Integer> removalListener = countingRemovalListener();
    WatchedCreatorLoader loader = new WatchedCreatorLoader();
    LoadingCache<String, Integer> cache = CacheBuilder.newBuilder()
        .expireAfterAccess(EXPIRING_TIME, MILLISECONDS)
        .removalListener(removalListener)

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Examples of com.google.common.testing.FakeTicker

    assertEquals("Eviction notifications must be received", 21,
        removalListener.getCount());
  }


  public void testRemovalListener_expireAfterWrite() {
    FakeTicker ticker = new FakeTicker();
    final AtomicInteger evictionCount = new AtomicInteger();
    final AtomicInteger applyCount = new AtomicInteger();
    final AtomicInteger totalSum = new AtomicInteger();


    RemovalListener<Integer, AtomicInteger> removalListener =
        new RemovalListener<Integer, AtomicInteger>() {
          @Override
          public void onRemoval(RemovalNotification<Integer, AtomicInteger> notification) {
            if (notification.wasEvicted()) {
              evictionCount.incrementAndGet();
              totalSum.addAndGet(notification.getValue().get());
            }
          }
        };


    CacheLoader<Integer, AtomicInteger> loader = new CacheLoader<Integer, AtomicInteger>() {
      @Override public AtomicInteger load(Integer key) {
        applyCount.incrementAndGet();
        return new AtomicInteger();
      }
    };


    LoadingCache<Integer, AtomicInteger> cache = CacheBuilder.newBuilder()
        .removalListener(removalListener)
        .expireAfterWrite(10, MILLISECONDS)
        .ticker(ticker)
        .build(loader);


    // Increment 100 times
    for (int i = 0; i < 100; ++i) {
      cache.getUnchecked(10).incrementAndGet();
      ticker.advance(1, MILLISECONDS);
    }


    assertEquals(evictionCount.get() + 1, applyCount.get());
    int remaining = cache.getUnchecked(10).get();
    assertEquals(100, totalSum.get() + remaining);

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