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From dhalp...@apache.org
Subject [27/50] [abbrv] incubator-beam git commit: Put classes in runners-core package into runners.core namespace
Date Tue, 13 Sep 2016 00:40:58 GMT
http://git-wip-us.apache.org/repos/asf/incubator-beam/blob/4bf3a3b3/runners/core-java/src/test/java/org/apache/beam/sdk/util/PushbackSideInputDoFnRunnerTest.java
----------------------------------------------------------------------
diff --git a/runners/core-java/src/test/java/org/apache/beam/sdk/util/PushbackSideInputDoFnRunnerTest.java b/runners/core-java/src/test/java/org/apache/beam/sdk/util/PushbackSideInputDoFnRunnerTest.java
deleted file mode 100644
index f8ad291..0000000
--- a/runners/core-java/src/test/java/org/apache/beam/sdk/util/PushbackSideInputDoFnRunnerTest.java
+++ /dev/null
@@ -1,231 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.beam.sdk.util;
-
-import static org.hamcrest.Matchers.containsInAnyOrder;
-import static org.hamcrest.Matchers.emptyIterable;
-import static org.hamcrest.Matchers.equalTo;
-import static org.hamcrest.Matchers.is;
-import static org.junit.Assert.assertThat;
-import static org.mockito.Mockito.when;
-
-import com.google.common.collect.ImmutableList;
-import java.util.ArrayList;
-import java.util.List;
-import org.apache.beam.sdk.testing.TestPipeline;
-import org.apache.beam.sdk.transforms.Create;
-import org.apache.beam.sdk.transforms.Sum;
-import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
-import org.apache.beam.sdk.transforms.windowing.GlobalWindow;
-import org.apache.beam.sdk.transforms.windowing.IntervalWindow;
-import org.apache.beam.sdk.transforms.windowing.PaneInfo;
-import org.apache.beam.sdk.transforms.windowing.Window;
-import org.apache.beam.sdk.values.PCollection;
-import org.apache.beam.sdk.values.PCollectionView;
-import org.hamcrest.Matchers;
-import org.joda.time.Instant;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.junit.runners.JUnit4;
-import org.mockito.Mock;
-import org.mockito.Mockito;
-import org.mockito.MockitoAnnotations;
-
-/**
- * Tests for {@link PushbackSideInputDoFnRunner}.
- */
-@RunWith(JUnit4.class)
-public class PushbackSideInputDoFnRunnerTest {
-  @Mock private ReadyCheckingSideInputReader reader;
-  private TestDoFnRunner<Integer, Integer> underlying;
-  private PCollectionView<Integer> singletonView;
-
-  @Before
-  public void setup() {
-    MockitoAnnotations.initMocks(this);
-    TestPipeline p = TestPipeline.create();
-    PCollection<Integer> created = p.apply(Create.of(1, 2, 3));
-    singletonView =
-        created
-            .apply(Window.into(new IdentitySideInputWindowFn()))
-            .apply(Sum.integersGlobally().asSingletonView());
-
-    underlying = new TestDoFnRunner<>();
-  }
-
-  private PushbackSideInputDoFnRunner<Integer, Integer> createRunner(
-      ImmutableList<PCollectionView<?>> views) {
-    PushbackSideInputDoFnRunner<Integer, Integer> runner =
-        PushbackSideInputDoFnRunner.create(underlying, views, reader);
-    runner.startBundle();
-    return runner;
-  }
-
-  @Test
-  public void startFinishBundleDelegates() {
-    PushbackSideInputDoFnRunner runner =
-        createRunner(ImmutableList.<PCollectionView<?>>of(singletonView));
-
-    assertThat(underlying.started, is(true));
-    assertThat(underlying.finished, is(false));
-    runner.finishBundle();
-    assertThat(underlying.finished, is(true));
-  }
-
-  @Test
-  public void processElementSideInputNotReady() {
-    when(reader.isReady(Mockito.eq(singletonView), Mockito.any(BoundedWindow.class)))
-        .thenReturn(false);
-
-    PushbackSideInputDoFnRunner<Integer, Integer> runner =
-        createRunner(ImmutableList.<PCollectionView<?>>of(singletonView));
-
-    WindowedValue<Integer> oneWindow =
-        WindowedValue.of(
-            2,
-            new Instant(-2),
-            new IntervalWindow(new Instant(-500L), new Instant(0L)),
-            PaneInfo.ON_TIME_AND_ONLY_FIRING);
-    Iterable<WindowedValue<Integer>> oneWindowPushback =
-        runner.processElementInReadyWindows(oneWindow);
-    assertThat(oneWindowPushback, containsInAnyOrder(oneWindow));
-    assertThat(underlying.inputElems, Matchers.<WindowedValue<Integer>>emptyIterable());
-  }
-
-  @Test
-  public void processElementSideInputNotReadyMultipleWindows() {
-    when(reader.isReady(Mockito.eq(singletonView), Mockito.any(BoundedWindow.class)))
-        .thenReturn(false);
-
-    PushbackSideInputDoFnRunner<Integer, Integer> runner =
-        createRunner(ImmutableList.<PCollectionView<?>>of(singletonView));
-
-    WindowedValue<Integer> multiWindow =
-        WindowedValue.of(
-            2,
-            new Instant(-2),
-            ImmutableList.of(
-                new IntervalWindow(new Instant(-500L), new Instant(0L)),
-                new IntervalWindow(BoundedWindow.TIMESTAMP_MIN_VALUE, new Instant(250L)),
-                GlobalWindow.INSTANCE),
-            PaneInfo.ON_TIME_AND_ONLY_FIRING);
-    Iterable<WindowedValue<Integer>> multiWindowPushback =
-        runner.processElementInReadyWindows(multiWindow);
-    assertThat(multiWindowPushback, equalTo(multiWindow.explodeWindows()));
-    assertThat(underlying.inputElems, Matchers.<WindowedValue<Integer>>emptyIterable());
-  }
-
-  @Test
-  public void processElementSideInputNotReadySomeWindows() {
-    when(reader.isReady(Mockito.eq(singletonView), Mockito.eq(GlobalWindow.INSTANCE)))
-        .thenReturn(false);
-    when(
-            reader.isReady(
-                Mockito.eq(singletonView),
-                org.mockito.AdditionalMatchers.not(Mockito.eq(GlobalWindow.INSTANCE))))
-        .thenReturn(true);
-
-    PushbackSideInputDoFnRunner<Integer, Integer> runner =
-        createRunner(ImmutableList.<PCollectionView<?>>of(singletonView));
-
-    IntervalWindow littleWindow = new IntervalWindow(new Instant(-500L), new Instant(0L));
-    IntervalWindow bigWindow =
-        new IntervalWindow(BoundedWindow.TIMESTAMP_MIN_VALUE, new Instant(250L));
-    WindowedValue<Integer> multiWindow =
-        WindowedValue.of(
-            2,
-            new Instant(-2),
-            ImmutableList.of(littleWindow, bigWindow, GlobalWindow.INSTANCE),
-            PaneInfo.NO_FIRING);
-    Iterable<WindowedValue<Integer>> multiWindowPushback =
-        runner.processElementInReadyWindows(multiWindow);
-    assertThat(
-        multiWindowPushback,
-        containsInAnyOrder(WindowedValue.timestampedValueInGlobalWindow(2, new Instant(-2L))));
-    assertThat(underlying.inputElems,
-        containsInAnyOrder(WindowedValue.of(2, new Instant(-2), littleWindow, PaneInfo.NO_FIRING),
-            WindowedValue.of(2, new Instant(-2), bigWindow, PaneInfo.NO_FIRING)));
-  }
-
-  @Test
-  public void processElementSideInputReadyAllWindows() {
-    when(reader.isReady(Mockito.eq(singletonView), Mockito.any(BoundedWindow.class)))
-        .thenReturn(true);
-
-    ImmutableList<PCollectionView<?>> views = ImmutableList.<PCollectionView<?>>of(singletonView);
-    PushbackSideInputDoFnRunner<Integer, Integer> runner = createRunner(views);
-
-    WindowedValue<Integer> multiWindow =
-        WindowedValue.of(
-            2,
-            new Instant(-2),
-            ImmutableList.of(
-                new IntervalWindow(new Instant(-500L), new Instant(0L)),
-                new IntervalWindow(BoundedWindow.TIMESTAMP_MIN_VALUE, new Instant(250L)),
-                GlobalWindow.INSTANCE),
-            PaneInfo.ON_TIME_AND_ONLY_FIRING);
-    Iterable<WindowedValue<Integer>> multiWindowPushback =
-        runner.processElementInReadyWindows(multiWindow);
-    assertThat(multiWindowPushback, emptyIterable());
-    assertThat(underlying.inputElems,
-        containsInAnyOrder(ImmutableList.copyOf(multiWindow.explodeWindows()).toArray()));
-  }
-
-  @Test
-  public void processElementNoSideInputs() {
-    PushbackSideInputDoFnRunner<Integer, Integer> runner =
-        createRunner(ImmutableList.<PCollectionView<?>>of());
-
-    WindowedValue<Integer> multiWindow =
-        WindowedValue.of(
-            2,
-            new Instant(-2),
-            ImmutableList.of(
-                new IntervalWindow(new Instant(-500L), new Instant(0L)),
-                new IntervalWindow(BoundedWindow.TIMESTAMP_MIN_VALUE, new Instant(250L)),
-                GlobalWindow.INSTANCE),
-            PaneInfo.ON_TIME_AND_ONLY_FIRING);
-    Iterable<WindowedValue<Integer>> multiWindowPushback =
-        runner.processElementInReadyWindows(multiWindow);
-    assertThat(multiWindowPushback, emptyIterable());
-    assertThat(underlying.inputElems, containsInAnyOrder(multiWindow));
-  }
-
-  private static class TestDoFnRunner<InputT, OutputT> implements DoFnRunner<InputT, OutputT> {
-    List<WindowedValue<InputT>> inputElems;
-    private boolean started = false;
-    private boolean finished = false;
-
-    @Override
-    public void startBundle() {
-      started = true;
-      inputElems = new ArrayList<>();
-    }
-
-    @Override
-    public void processElement(WindowedValue<InputT> elem) {
-      inputElems.add(elem);
-    }
-
-    @Override
-    public void finishBundle() {
-      finished = true;
-    }
-  }
-}

http://git-wip-us.apache.org/repos/asf/incubator-beam/blob/4bf3a3b3/runners/core-java/src/test/java/org/apache/beam/sdk/util/ReduceFnRunnerTest.java
----------------------------------------------------------------------
diff --git a/runners/core-java/src/test/java/org/apache/beam/sdk/util/ReduceFnRunnerTest.java b/runners/core-java/src/test/java/org/apache/beam/sdk/util/ReduceFnRunnerTest.java
deleted file mode 100644
index 647495c..0000000
--- a/runners/core-java/src/test/java/org/apache/beam/sdk/util/ReduceFnRunnerTest.java
+++ /dev/null
@@ -1,1442 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.beam.sdk.util;
-
-import static com.google.common.base.Preconditions.checkArgument;
-import static org.apache.beam.sdk.WindowMatchers.isSingleWindowedValue;
-import static org.apache.beam.sdk.WindowMatchers.isWindowedValue;
-import static org.hamcrest.Matchers.contains;
-import static org.hamcrest.Matchers.containsInAnyOrder;
-import static org.hamcrest.Matchers.emptyIterable;
-import static org.hamcrest.Matchers.equalTo;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertThat;
-import static org.junit.Assert.assertTrue;
-import static org.mockito.Matchers.any;
-import static org.mockito.Mockito.doAnswer;
-import static org.mockito.Mockito.doNothing;
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.when;
-import static org.mockito.Mockito.withSettings;
-
-import com.google.common.collect.Iterables;
-import java.util.Iterator;
-import java.util.List;
-import org.apache.beam.sdk.WindowMatchers;
-import org.apache.beam.sdk.coders.VarIntCoder;
-import org.apache.beam.sdk.options.PipelineOptions;
-import org.apache.beam.sdk.options.PipelineOptionsFactory;
-import org.apache.beam.sdk.transforms.CombineWithContext.CombineFnWithContext;
-import org.apache.beam.sdk.transforms.CombineWithContext.Context;
-import org.apache.beam.sdk.transforms.Sum;
-import org.apache.beam.sdk.transforms.windowing.AfterEach;
-import org.apache.beam.sdk.transforms.windowing.AfterFirst;
-import org.apache.beam.sdk.transforms.windowing.AfterPane;
-import org.apache.beam.sdk.transforms.windowing.AfterProcessingTime;
-import org.apache.beam.sdk.transforms.windowing.AfterWatermark;
-import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
-import org.apache.beam.sdk.transforms.windowing.FixedWindows;
-import org.apache.beam.sdk.transforms.windowing.GlobalWindow;
-import org.apache.beam.sdk.transforms.windowing.GlobalWindows;
-import org.apache.beam.sdk.transforms.windowing.IntervalWindow;
-import org.apache.beam.sdk.transforms.windowing.Never;
-import org.apache.beam.sdk.transforms.windowing.OutputTimeFns;
-import org.apache.beam.sdk.transforms.windowing.PaneInfo;
-import org.apache.beam.sdk.transforms.windowing.PaneInfo.Timing;
-import org.apache.beam.sdk.transforms.windowing.Repeatedly;
-import org.apache.beam.sdk.transforms.windowing.Sessions;
-import org.apache.beam.sdk.transforms.windowing.SlidingWindows;
-import org.apache.beam.sdk.transforms.windowing.Trigger;
-import org.apache.beam.sdk.transforms.windowing.Window.ClosingBehavior;
-import org.apache.beam.sdk.transforms.windowing.WindowFn;
-import org.apache.beam.sdk.util.WindowingStrategy.AccumulationMode;
-import org.apache.beam.sdk.values.PCollectionView;
-import org.apache.beam.sdk.values.TimestampedValue;
-import org.joda.time.Duration;
-import org.joda.time.Instant;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.junit.runners.JUnit4;
-import org.mockito.Matchers;
-import org.mockito.Mock;
-import org.mockito.Mockito;
-import org.mockito.MockitoAnnotations;
-import org.mockito.invocation.InvocationOnMock;
-import org.mockito.stubbing.Answer;
-
-/**
- * Tests for {@link ReduceFnRunner}. These tests instantiate a full "stack" of
- * {@link ReduceFnRunner} with enclosed {@link ReduceFn}, down to the installed {@link Trigger}
- * (sometimes mocked). They proceed by injecting elements and advancing watermark and
- * processing time, then verifying produced panes and counters.
- */
-@RunWith(JUnit4.class)
-public class ReduceFnRunnerTest {
-  @Mock private SideInputReader mockSideInputReader;
-  private Trigger mockTrigger;
-  private PCollectionView<Integer> mockView;
-
-  private IntervalWindow firstWindow;
-
-  private static Trigger.TriggerContext anyTriggerContext() {
-    return Mockito.<Trigger.TriggerContext>any();
-  }
-  private static Trigger.OnElementContext anyElementContext() {
-    return Mockito.<Trigger.OnElementContext>any();
-  }
-
-  @Before
-  public void setUp() {
-    MockitoAnnotations.initMocks(this);
-
-    mockTrigger = mock(Trigger.class, withSettings().serializable());
-
-    @SuppressWarnings("unchecked")
-    PCollectionView<Integer> mockViewUnchecked =
-        mock(PCollectionView.class, withSettings().serializable());
-    mockView = mockViewUnchecked;
-    firstWindow = new IntervalWindow(new Instant(0), new Instant(10));
-  }
-
-  private void injectElement(ReduceFnTester<Integer, ?, IntervalWindow> tester, int element)
-      throws Exception {
-    doNothing().when(mockTrigger).onElement(anyElementContext());
-    tester.injectElements(TimestampedValue.of(element, new Instant(element)));
-  }
-
-  private void triggerShouldFinish(Trigger mockTrigger) throws Exception {
-    doAnswer(new Answer<Void>() {
-      @Override
-      public Void answer(InvocationOnMock invocation) throws Exception {
-        @SuppressWarnings("unchecked")
-        Trigger.TriggerContext context =
-            (Trigger.TriggerContext) invocation.getArguments()[0];
-        context.trigger().setFinished(true);
-        return null;
-      }
-    })
-    .when(mockTrigger).onFire(anyTriggerContext());
- }
-
-  @Test
-  public void testOnElementBufferingDiscarding() throws Exception {
-    // Test basic execution of a trigger using a non-combining window set and discarding mode.
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(FixedWindows.of(Duration.millis(10)), mockTrigger,
-            AccumulationMode.DISCARDING_FIRED_PANES, Duration.millis(100),
-            ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    // Pane of {1, 2}
-    injectElement(tester, 1);
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    injectElement(tester, 2);
-    assertThat(tester.extractOutput(),
-        contains(isSingleWindowedValue(containsInAnyOrder(1, 2), 1, 0, 10)));
-
-    // Pane of just 3, and finish
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    injectElement(tester, 3);
-    assertThat(tester.extractOutput(),
-            contains(isSingleWindowedValue(containsInAnyOrder(3), 3, 0, 10)));
-    assertTrue(tester.isMarkedFinished(firstWindow));
-    tester.assertHasOnlyGlobalAndFinishedSetsFor(firstWindow);
-
-    // This element shouldn't be seen, because the trigger has finished
-    injectElement(tester, 4);
-
-    assertEquals(1, tester.getElementsDroppedDueToClosedWindow());
-  }
-
-  @Test
-  public void testOnElementBufferingAccumulating() throws Exception {
-    // Test basic execution of a trigger using a non-combining window set and accumulating mode.
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(FixedWindows.of(Duration.millis(10)), mockTrigger,
-            AccumulationMode.ACCUMULATING_FIRED_PANES, Duration.millis(100),
-            ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    injectElement(tester, 1);
-
-    // Fires {1, 2}
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    injectElement(tester, 2);
-
-    // Fires {1, 2, 3} because we are in accumulating mode
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    injectElement(tester, 3);
-
-    // This element shouldn't be seen, because the trigger has finished
-    injectElement(tester, 4);
-
-    assertThat(
-        tester.extractOutput(),
-        contains(
-            isSingleWindowedValue(containsInAnyOrder(1, 2), 1, 0, 10),
-            isSingleWindowedValue(containsInAnyOrder(1, 2, 3), 3, 0, 10)));
-    assertTrue(tester.isMarkedFinished(firstWindow));
-    tester.assertHasOnlyGlobalAndFinishedSetsFor(firstWindow);
-  }
-
-  @Test
-  public void testOnElementCombiningDiscarding() throws Exception {
-    // Test basic execution of a trigger using a non-combining window set and discarding mode.
-    ReduceFnTester<Integer, Integer, IntervalWindow> tester = ReduceFnTester.combining(
-        FixedWindows.of(Duration.millis(10)), mockTrigger, AccumulationMode.DISCARDING_FIRED_PANES,
-        new Sum.SumIntegerFn().<String>asKeyedFn(), VarIntCoder.of(), Duration.millis(100));
-
-    injectElement(tester, 2);
-
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    injectElement(tester, 3);
-
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    injectElement(tester, 4);
-
-    // This element shouldn't be seen, because the trigger has finished
-    injectElement(tester, 6);
-
-    assertThat(
-        tester.extractOutput(),
-        contains(
-            isSingleWindowedValue(equalTo(5), 2, 0, 10),
-            isSingleWindowedValue(equalTo(4), 4, 0, 10)));
-    assertTrue(tester.isMarkedFinished(firstWindow));
-    tester.assertHasOnlyGlobalAndFinishedSetsFor(firstWindow);
-  }
-
-  /**
-   * Tests that the garbage collection time for a fixed window does not overflow the end of time.
-   */
-  @Test
-  public void testFixedWindowEndOfTimeGarbageCollection() throws Exception {
-
-    Duration allowedLateness = Duration.standardDays(365);
-    Duration windowSize = Duration.millis(10);
-    WindowFn<Object, IntervalWindow> windowFn = FixedWindows.of(windowSize);
-
-    // This timestamp falls into a window where the end of the window is before the end of the
-    // global window - the "end of time" - yet its expiration time is after.
-    final Instant elementTimestamp =
-        GlobalWindow.INSTANCE.maxTimestamp().minus(allowedLateness).plus(1);
-
-    IntervalWindow window = Iterables.getOnlyElement(
-        windowFn.assignWindows(
-            windowFn.new AssignContext() {
-              @Override
-              public Object element() {
-                throw new UnsupportedOperationException();
-              }
-              @Override
-              public Instant timestamp() {
-                return elementTimestamp;
-              }
-
-              @Override
-              public BoundedWindow window() {
-                throw new UnsupportedOperationException();
-              }
-            }));
-
-    assertTrue(
-        window.maxTimestamp().isBefore(GlobalWindow.INSTANCE.maxTimestamp()));
-    assertTrue(
-        window.maxTimestamp().plus(allowedLateness).isAfter(GlobalWindow.INSTANCE.maxTimestamp()));
-
-    // Test basic execution of a trigger using a non-combining window set and accumulating mode.
-    ReduceFnTester<Integer, Integer, IntervalWindow> tester =
-        ReduceFnTester.combining(
-            windowFn,
-            AfterWatermark.pastEndOfWindow().withLateFirings(Never.ever()),
-            AccumulationMode.DISCARDING_FIRED_PANES,
-            new Sum.SumIntegerFn().<String>asKeyedFn(),
-            VarIntCoder.of(),
-            allowedLateness);
-
-    tester.injectElements(TimestampedValue.of(13, elementTimestamp));
-
-    // Should fire ON_TIME pane and there will be a checkState that the cleanup time
-    // is prior to timestamp max value
-    tester.advanceInputWatermark(window.maxTimestamp());
-
-    // Nothing in the ON_TIME pane (not governed by triggers, but by ReduceFnRunner)
-    assertThat(tester.extractOutput(), emptyIterable());
-
-    tester.injectElements(TimestampedValue.of(42, elementTimestamp));
-
-    // Now the final pane should fire, demonstrating that the GC time was truncated
-    tester.advanceInputWatermark(GlobalWindow.INSTANCE.maxTimestamp());
-    assertThat(tester.extractOutput(), contains(isWindowedValue(equalTo(55))));
-  }
-
-  @Test
-  public void testOnElementCombiningAccumulating() throws Exception {
-    // Test basic execution of a trigger using a non-combining window set and accumulating mode.
-    ReduceFnTester<Integer, Integer, IntervalWindow> tester =
-        ReduceFnTester.combining(FixedWindows.of(Duration.millis(10)), mockTrigger,
-            AccumulationMode.ACCUMULATING_FIRED_PANES, new Sum.SumIntegerFn().<String>asKeyedFn(),
-            VarIntCoder.of(), Duration.millis(100));
-
-    injectElement(tester, 1);
-
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    injectElement(tester, 2);
-
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    injectElement(tester, 3);
-
-    // This element shouldn't be seen, because the trigger has finished
-    injectElement(tester, 4);
-
-    assertThat(
-        tester.extractOutput(),
-        contains(
-            isSingleWindowedValue(equalTo(3), 1, 0, 10),
-            isSingleWindowedValue(equalTo(6), 3, 0, 10)));
-    assertTrue(tester.isMarkedFinished(firstWindow));
-    tester.assertHasOnlyGlobalAndFinishedSetsFor(firstWindow);
-  }
-
-  @Test
-  public void testOnElementCombiningWithContext() throws Exception {
-    Integer expectedValue = 5;
-    WindowingStrategy<?, IntervalWindow> windowingStrategy = WindowingStrategy
-        .of(FixedWindows.of(Duration.millis(10)))
-        .withTrigger(mockTrigger)
-        .withMode(AccumulationMode.DISCARDING_FIRED_PANES)
-        .withOutputTimeFn(OutputTimeFns.outputAtEarliestInputTimestamp())
-        .withAllowedLateness(Duration.millis(100));
-
-    TestOptions options = PipelineOptionsFactory.as(TestOptions.class);
-    options.setValue(5);
-
-    when(mockSideInputReader.contains(Matchers.<PCollectionView<Integer>>any())).thenReturn(true);
-    when(mockSideInputReader.get(
-        Matchers.<PCollectionView<Integer>>any(), any(BoundedWindow.class))).thenReturn(5);
-
-    @SuppressWarnings({"rawtypes", "unchecked", "unused"})
-    Object suppressWarningsVar = when(mockView.getWindowingStrategyInternal())
-        .thenReturn((WindowingStrategy) windowingStrategy);
-
-    SumAndVerifyContextFn combineFn = new SumAndVerifyContextFn(mockView, expectedValue);
-    // Test basic execution of a trigger using a non-combining window set and discarding mode.
-    ReduceFnTester<Integer, Integer, IntervalWindow> tester = ReduceFnTester.combining(
-        windowingStrategy, combineFn.<String>asKeyedFn(),
-        VarIntCoder.of(), options, mockSideInputReader);
-
-    injectElement(tester, 2);
-
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    injectElement(tester, 3);
-
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    injectElement(tester, 4);
-
-    // This element shouldn't be seen, because the trigger has finished
-    injectElement(tester, 6);
-
-    assertThat(
-        tester.extractOutput(),
-        contains(
-            isSingleWindowedValue(equalTo(5), 2, 0, 10),
-            isSingleWindowedValue(equalTo(4), 4, 0, 10)));
-    assertTrue(tester.isMarkedFinished(firstWindow));
-    tester.assertHasOnlyGlobalAndFinishedSetsFor(firstWindow);
-  }
-
-  @Test
-  public void testWatermarkHoldAndLateData() throws Exception {
-    // Test handling of late data. Specifically, ensure the watermark hold is correct.
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(FixedWindows.of(Duration.millis(10)), mockTrigger,
-            AccumulationMode.ACCUMULATING_FIRED_PANES, Duration.millis(10),
-            ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    // Input watermark -> null
-    assertEquals(null, tester.getWatermarkHold());
-    assertEquals(null, tester.getOutputWatermark());
-
-    // All on time data, verify watermark hold.
-    injectElement(tester, 1);
-    injectElement(tester, 3);
-    assertEquals(new Instant(1), tester.getWatermarkHold());
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    injectElement(tester, 2);
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertThat(output, contains(
-        isSingleWindowedValue(containsInAnyOrder(1, 2, 3),
-            1, // timestamp
-            0, // window start
-            10))); // window end
-    assertThat(output.get(0).getPane(),
-        equalTo(PaneInfo.createPane(true, false, Timing.EARLY, 0, -1)));
-
-    // Holding for the end-of-window transition.
-    assertEquals(new Instant(9), tester.getWatermarkHold());
-    // Nothing dropped.
-    assertEquals(0, tester.getElementsDroppedDueToClosedWindow());
-
-    // Input watermark -> 4, output watermark should advance that far as well
-    tester.advanceInputWatermark(new Instant(4));
-    assertEquals(new Instant(4), tester.getOutputWatermark());
-
-    // Some late, some on time. Verify that we only hold to the minimum of on-time.
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(false);
-    tester.advanceInputWatermark(new Instant(4));
-    injectElement(tester, 2);
-    injectElement(tester, 3);
-    assertEquals(new Instant(9), tester.getWatermarkHold());
-    injectElement(tester, 5);
-    assertEquals(new Instant(5), tester.getWatermarkHold());
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    injectElement(tester, 4);
-    output = tester.extractOutput();
-    assertThat(output,
-        contains(
-            isSingleWindowedValue(containsInAnyOrder(
-                1, 2, 3, // earlier firing
-                2, 3, 4, 5), // new elements
-            4, // timestamp
-            0, // window start
-            10))); // window end
-    assertThat(output.get(0).getPane(),
-        equalTo(PaneInfo.createPane(false, false, Timing.EARLY, 1, -1)));
-
-    // All late -- output at end of window timestamp.
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(false);
-    tester.advanceInputWatermark(new Instant(8));
-    injectElement(tester, 6);
-    injectElement(tester, 5);
-    assertEquals(new Instant(9), tester.getWatermarkHold());
-    injectElement(tester, 4);
-
-    // Fire the ON_TIME pane
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    tester.advanceInputWatermark(new Instant(10));
-
-    // Output time is end of the window, because all the new data was late, but the pane
-    // is the ON_TIME pane.
-    output = tester.extractOutput();
-    assertThat(output,
-        contains(isSingleWindowedValue(
-            containsInAnyOrder(1, 2, 3, // earlier firing
-                2, 3, 4, 5, // earlier firing
-                4, 5, 6), // new elements
-            9, // timestamp
-            0, // window start
-            10))); // window end
-    assertThat(output.get(0).getPane(),
-        equalTo(PaneInfo.createPane(false, false, Timing.ON_TIME, 2, 0)));
-
-    // This is "pending" at the time the watermark makes it way-late.
-    // Because we're about to expire the window, we output it.
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(false);
-    injectElement(tester, 8);
-    assertEquals(0, tester.getElementsDroppedDueToClosedWindow());
-
-    // Exceed the GC limit, triggering the last pane to be fired
-    tester.advanceInputWatermark(new Instant(50));
-    output = tester.extractOutput();
-    // Output time is still end of the window, because the new data (8) was behind
-    // the output watermark.
-    assertThat(output,
-        contains(isSingleWindowedValue(
-            containsInAnyOrder(1, 2, 3, // earlier firing
-                2, 3, 4, 5, // earlier firing
-                4, 5, 6, // earlier firing
-                8), // new element prior to window becoming expired
-            9, // timestamp
-            0, // window start
-            10))); // window end
-    assertThat(
-        output.get(0).getPane(),
-        equalTo(PaneInfo.createPane(false, true, Timing.LATE, 3, 1)));
-    assertEquals(new Instant(50), tester.getOutputWatermark());
-    assertEquals(null, tester.getWatermarkHold());
-
-    // Late timers are ignored
-    tester.fireTimer(new IntervalWindow(new Instant(0), new Instant(10)), new Instant(12),
-        TimeDomain.EVENT_TIME);
-
-    // And because we're past the end of window + allowed lateness, everything should be cleaned up.
-    assertFalse(tester.isMarkedFinished(firstWindow));
-    tester.assertHasOnlyGlobalAndFinishedSetsFor();
-  }
-
-  @Test
-  public void dontSetHoldIfTooLateForEndOfWindowTimer() throws Exception {
-    // Make sure holds are only set if they are accompanied by an end-of-window timer.
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(FixedWindows.of(Duration.millis(10)), mockTrigger,
-            AccumulationMode.ACCUMULATING_FIRED_PANES, Duration.millis(10),
-            ClosingBehavior.FIRE_ALWAYS);
-    tester.setAutoAdvanceOutputWatermark(false);
-
-    // Case: Unobservably late
-    tester.advanceInputWatermark(new Instant(15));
-    tester.advanceOutputWatermark(new Instant(11));
-    injectElement(tester, 14);
-    // Hold was applied, waiting for end-of-window timer.
-    assertEquals(new Instant(14), tester.getWatermarkHold());
-    assertEquals(new Instant(19), tester.getNextTimer(TimeDomain.EVENT_TIME));
-
-    // Trigger the end-of-window timer.
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    tester.advanceInputWatermark(new Instant(20));
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(false);
-    // Hold has been replaced with garbage collection hold. Waiting for garbage collection.
-    assertEquals(new Instant(29), tester.getWatermarkHold());
-    assertEquals(new Instant(29), tester.getNextTimer(TimeDomain.EVENT_TIME));
-
-    // Case: Maybe late 1
-    injectElement(tester, 13);
-    // No change to hold or timers.
-    assertEquals(new Instant(29), tester.getWatermarkHold());
-    assertEquals(new Instant(29), tester.getNextTimer(TimeDomain.EVENT_TIME));
-
-    // Trigger the garbage collection timer.
-    tester.advanceInputWatermark(new Instant(30));
-
-    // Everything should be cleaned up.
-    assertFalse(tester.isMarkedFinished(new IntervalWindow(new Instant(10), new Instant(20))));
-    tester.assertHasOnlyGlobalAndFinishedSetsFor();
-  }
-
-  @Test
-  public void testPaneInfoAllStates() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(FixedWindows.of(Duration.millis(10)), mockTrigger,
-            AccumulationMode.DISCARDING_FIRED_PANES, Duration.millis(100),
-            ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    tester.advanceInputWatermark(new Instant(0));
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    injectElement(tester, 1);
-    assertThat(tester.extractOutput(), contains(
-        WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(true, false, Timing.EARLY))));
-
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    injectElement(tester, 2);
-    assertThat(tester.extractOutput(), contains(
-        WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(false, false, Timing.EARLY, 1, -1))));
-
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(false);
-    tester.advanceInputWatermark(new Instant(15));
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    injectElement(tester, 3);
-    assertThat(tester.extractOutput(), contains(
-        WindowMatchers.valueWithPaneInfo(
-            PaneInfo.createPane(false, false, Timing.ON_TIME, 2, 0))));
-
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    injectElement(tester, 4);
-    assertThat(tester.extractOutput(), contains(
-        WindowMatchers.valueWithPaneInfo(
-            PaneInfo.createPane(false, false, Timing.LATE, 3, 1))));
-
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    injectElement(tester, 5);
-    assertThat(tester.extractOutput(), contains(
-        WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(false, true, Timing.LATE, 4, 2))));
-  }
-
-  @Test
-  public void testPaneInfoAllStatesAfterWatermark() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester = ReduceFnTester.nonCombining(
-        WindowingStrategy.of(FixedWindows.of(Duration.millis(10)))
-            .withTrigger(Repeatedly.forever(AfterFirst.of(
-                AfterPane.elementCountAtLeast(2),
-                AfterWatermark.pastEndOfWindow())))
-            .withMode(AccumulationMode.DISCARDING_FIRED_PANES)
-            .withAllowedLateness(Duration.millis(100))
-            .withOutputTimeFn(OutputTimeFns.outputAtEarliestInputTimestamp())
-            .withClosingBehavior(ClosingBehavior.FIRE_ALWAYS));
-
-    tester.advanceInputWatermark(new Instant(0));
-    tester.injectElements(
-        TimestampedValue.of(1, new Instant(1)), TimestampedValue.of(2, new Instant(2)));
-
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertThat(
-        output,
-        contains(WindowMatchers.valueWithPaneInfo(
-            PaneInfo.createPane(true, false, Timing.EARLY, 0, -1))));
-    assertThat(
-        output,
-        contains(
-            WindowMatchers.isSingleWindowedValue(containsInAnyOrder(1, 2), 1, 0, 10)));
-
-    tester.advanceInputWatermark(new Instant(50));
-
-    // We should get the ON_TIME pane even though it is empty,
-    // because we have an AfterWatermark.pastEndOfWindow() trigger.
-    output = tester.extractOutput();
-    assertThat(
-        output,
-        contains(WindowMatchers.valueWithPaneInfo(
-            PaneInfo.createPane(false, false, Timing.ON_TIME, 1, 0))));
-    assertThat(
-        output,
-        contains(
-            WindowMatchers.isSingleWindowedValue(emptyIterable(), 9, 0, 10)));
-
-    // We should get the final pane even though it is empty.
-    tester.advanceInputWatermark(new Instant(150));
-    output = tester.extractOutput();
-    assertThat(
-        output,
-        contains(
-            WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(false, true, Timing.LATE, 2, 1))));
-    assertThat(
-        output,
-        contains(
-            WindowMatchers.isSingleWindowedValue(emptyIterable(), 9, 0, 10)));
-  }
-
-  @Test
-  public void noEmptyPanesFinalIfNonEmpty() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester = ReduceFnTester.nonCombining(
-        WindowingStrategy.of(FixedWindows.of(Duration.millis(10)))
-            .withTrigger(Repeatedly.<IntervalWindow>forever(AfterFirst.<IntervalWindow>of(
-                AfterPane.elementCountAtLeast(2),
-                AfterWatermark.pastEndOfWindow())))
-            .withMode(AccumulationMode.ACCUMULATING_FIRED_PANES)
-            .withAllowedLateness(Duration.millis(100))
-            .withOutputTimeFn(OutputTimeFns.outputAtEarliestInputTimestamp())
-            .withClosingBehavior(ClosingBehavior.FIRE_IF_NON_EMPTY));
-
-    tester.advanceInputWatermark(new Instant(0));
-    tester.injectElements(
-        TimestampedValue.of(1, new Instant(1)),
-        TimestampedValue.of(2, new Instant(2)));
-    tester.advanceInputWatermark(new Instant(20));
-    tester.advanceInputWatermark(new Instant(250));
-
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertThat(output, contains(
-        // Trigger with 2 elements
-        WindowMatchers.isSingleWindowedValue(containsInAnyOrder(1, 2), 1, 0, 10),
-        // Trigger for the empty on time pane
-        WindowMatchers.isSingleWindowedValue(containsInAnyOrder(1, 2), 9, 0, 10)));
-  }
-
-  @Test
-  public void noEmptyPanesFinalAlways() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester = ReduceFnTester.nonCombining(
-        WindowingStrategy.of(FixedWindows.of(Duration.millis(10)))
-            .withTrigger(Repeatedly.<IntervalWindow>forever(AfterFirst.<IntervalWindow>of(
-                AfterPane.elementCountAtLeast(2),
-                AfterWatermark.pastEndOfWindow())))
-            .withMode(AccumulationMode.ACCUMULATING_FIRED_PANES)
-            .withAllowedLateness(Duration.millis(100))
-            .withOutputTimeFn(OutputTimeFns.outputAtEarliestInputTimestamp())
-            .withClosingBehavior(ClosingBehavior.FIRE_ALWAYS));
-
-    tester.advanceInputWatermark(new Instant(0));
-    tester.injectElements(
-        TimestampedValue.of(1, new Instant(1)),
-        TimestampedValue.of(2, new Instant(2)));
-    tester.advanceInputWatermark(new Instant(20));
-    tester.advanceInputWatermark(new Instant(250));
-
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertThat(output, contains(
-        // Trigger with 2 elements
-        WindowMatchers.isSingleWindowedValue(containsInAnyOrder(1, 2), 1, 0, 10),
-        // Trigger for the empty on time pane
-        WindowMatchers.isSingleWindowedValue(containsInAnyOrder(1, 2), 9, 0, 10),
-        // Trigger for the final pane
-        WindowMatchers.isSingleWindowedValue(containsInAnyOrder(1, 2), 9, 0, 10)));
-  }
-
-  @Test
-  public void testPaneInfoAllStatesAfterWatermarkAccumulating() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester = ReduceFnTester.nonCombining(
-        WindowingStrategy.of(FixedWindows.of(Duration.millis(10)))
-            .withTrigger(Repeatedly.forever(AfterFirst.of(
-                AfterPane.elementCountAtLeast(2),
-                AfterWatermark.pastEndOfWindow())))
-            .withMode(AccumulationMode.ACCUMULATING_FIRED_PANES)
-            .withAllowedLateness(Duration.millis(100))
-            .withOutputTimeFn(OutputTimeFns.outputAtEarliestInputTimestamp())
-            .withClosingBehavior(ClosingBehavior.FIRE_ALWAYS));
-
-    tester.advanceInputWatermark(new Instant(0));
-    tester.injectElements(
-        TimestampedValue.of(1, new Instant(1)), TimestampedValue.of(2, new Instant(2)));
-
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertThat(
-        output,
-        contains(WindowMatchers.valueWithPaneInfo(
-            PaneInfo.createPane(true, false, Timing.EARLY, 0, -1))));
-    assertThat(
-        output,
-        contains(
-            WindowMatchers.isSingleWindowedValue(containsInAnyOrder(1, 2), 1, 0, 10)));
-
-    tester.advanceInputWatermark(new Instant(50));
-
-    // We should get the ON_TIME pane even though it is empty,
-    // because we have an AfterWatermark.pastEndOfWindow() trigger.
-    output = tester.extractOutput();
-    assertThat(
-        output,
-        contains(WindowMatchers.valueWithPaneInfo(
-            PaneInfo.createPane(false, false, Timing.ON_TIME, 1, 0))));
-    assertThat(
-        output,
-        contains(
-            WindowMatchers.isSingleWindowedValue(containsInAnyOrder(1, 2), 9, 0, 10)));
-
-    // We should get the final pane even though it is empty.
-    tester.advanceInputWatermark(new Instant(150));
-    output = tester.extractOutput();
-    assertThat(
-        output,
-        contains(
-            WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(false, true, Timing.LATE, 2, 1))));
-    assertThat(
-        output,
-        contains(
-            WindowMatchers.isSingleWindowedValue(containsInAnyOrder(1, 2), 9, 0, 10)));
-  }
-
-  @Test
-  public void testPaneInfoFinalAndOnTime() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester = ReduceFnTester.nonCombining(
-        WindowingStrategy.of(FixedWindows.of(Duration.millis(10)))
-            .withTrigger(
-                Repeatedly.forever(AfterPane.elementCountAtLeast(2))
-                    .orFinally(AfterWatermark.pastEndOfWindow()))
-            .withMode(AccumulationMode.DISCARDING_FIRED_PANES)
-            .withAllowedLateness(Duration.millis(100))
-            .withClosingBehavior(ClosingBehavior.FIRE_ALWAYS));
-
-    tester.advanceInputWatermark(new Instant(0));
-
-    // Should trigger due to element count
-    tester.injectElements(
-        TimestampedValue.of(1, new Instant(1)), TimestampedValue.of(2, new Instant(2)));
-
-    assertThat(
-        tester.extractOutput(),
-        contains(WindowMatchers.valueWithPaneInfo(
-            PaneInfo.createPane(true, false, Timing.EARLY, 0, -1))));
-
-    tester.advanceInputWatermark(new Instant(150));
-    assertThat(tester.extractOutput(), contains(
-        WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(false, true, Timing.ON_TIME, 1, 0))));
-  }
-
-  @Test
-  public void testPaneInfoSkipToFinish() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(FixedWindows.of(Duration.millis(10)), mockTrigger,
-            AccumulationMode.DISCARDING_FIRED_PANES, Duration.millis(100),
-            ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    tester.advanceInputWatermark(new Instant(0));
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    injectElement(tester, 1);
-    assertThat(tester.extractOutput(), contains(
-        WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(true, true, Timing.EARLY))));
-  }
-
-  @Test
-  public void testPaneInfoSkipToNonSpeculativeAndFinish() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(FixedWindows.of(Duration.millis(10)), mockTrigger,
-            AccumulationMode.DISCARDING_FIRED_PANES, Duration.millis(100),
-            ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    tester.advanceInputWatermark(new Instant(15));
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    injectElement(tester, 1);
-    assertThat(tester.extractOutput(), contains(
-        WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(true, true, Timing.LATE))));
-  }
-
-  @Test
-  public void testMergeBeforeFinalizing() throws Exception {
-    // Verify that we merge windows before producing output so users don't see undesired
-    // unmerged windows.
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(Sessions.withGapDuration(Duration.millis(10)), mockTrigger,
-            AccumulationMode.DISCARDING_FIRED_PANES, Duration.millis(0),
-            ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    // All on time data, verify watermark hold.
-    // These two windows should pre-merge immediately to [1, 20)
-    tester.injectElements(
-        TimestampedValue.of(1, new Instant(1)), // in [1, 11)
-        TimestampedValue.of(10, new Instant(10))); // in [10, 20)
-
-    // And this should fire the end-of-window timer
-    tester.advanceInputWatermark(new Instant(100));
-
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertThat(output.size(), equalTo(1));
-    assertThat(output.get(0),
-        isSingleWindowedValue(containsInAnyOrder(1, 10),
-            1, // timestamp
-            1, // window start
-            20)); // window end
-    assertThat(
-        output.get(0).getPane(),
-        equalTo(PaneInfo.createPane(true, true, Timing.ON_TIME, 0, 0)));
-  }
-
-  /**
-   * It is possible for a session window's trigger to be closed at the point at which
-   * the (merged) session window is garbage collected. Make sure we don't accidentally
-   * assume the window is still active.
-   */
-  @Test
-  public void testMergingWithCloseBeforeGC() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(Sessions.withGapDuration(Duration.millis(10)), mockTrigger,
-            AccumulationMode.DISCARDING_FIRED_PANES, Duration.millis(50),
-            ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    // Two elements in two overlapping session windows.
-    tester.injectElements(
-        TimestampedValue.of(1, new Instant(1)), // in [1, 11)
-        TimestampedValue.of(10, new Instant(10))); // in [10, 20)
-
-    // Close the trigger, but the gargbage collection timer is still pending.
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    tester.advanceInputWatermark(new Instant(30));
-
-    // Now the garbage collection timer will fire, finding the trigger already closed.
-    tester.advanceInputWatermark(new Instant(100));
-
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertThat(output.size(), equalTo(1));
-    assertThat(output.get(0),
-        isSingleWindowedValue(containsInAnyOrder(1, 10),
-            1, // timestamp
-            1, // window start
-            20)); // window end
-    assertThat(
-        output.get(0).getPane(),
-        equalTo(PaneInfo.createPane(true, true, Timing.ON_TIME, 0, 0)));
-  }
-
-  /**
-   * Ensure a closed trigger has its state recorded in the merge result window.
-   */
-  @Test
-  public void testMergingWithCloseTrigger() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(Sessions.withGapDuration(Duration.millis(10)), mockTrigger,
-                                    AccumulationMode.DISCARDING_FIRED_PANES, Duration.millis(50),
-                                    ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    // Create a new merged session window.
-    tester.injectElements(TimestampedValue.of(1, new Instant(1)),
-                          TimestampedValue.of(2, new Instant(2)));
-
-    // Force the trigger to be closed for the merged window.
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    tester.advanceInputWatermark(new Instant(13));
-
-    // Trigger is now closed.
-    assertTrue(tester.isMarkedFinished(new IntervalWindow(new Instant(1), new Instant(12))));
-
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(false);
-
-    // Revisit the same session window.
-    tester.injectElements(TimestampedValue.of(1, new Instant(1)),
-                          TimestampedValue.of(2, new Instant(2)));
-
-    // Trigger is still closed.
-    assertTrue(tester.isMarkedFinished(new IntervalWindow(new Instant(1), new Instant(12))));
-  }
-
-  /**
-   * If a later event tries to reuse an earlier session window which has been closed, we
-   * should reject that element and not fail due to the window no longer being active.
-   */
-  @Test
-  public void testMergingWithReusedWindow() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(Sessions.withGapDuration(Duration.millis(10)), mockTrigger,
-                                    AccumulationMode.DISCARDING_FIRED_PANES, Duration.millis(50),
-                                    ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    // One elements in one session window.
-    tester.injectElements(TimestampedValue.of(1, new Instant(1))); // in [1, 11), gc at 21.
-
-    // Close the trigger, but the gargbage collection timer is still pending.
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    tester.advanceInputWatermark(new Instant(15));
-
-    // Another element in the same session window.
-    // Should be discarded with 'window closed'.
-    tester.injectElements(TimestampedValue.of(1, new Instant(1))); // in [1, 11), gc at 21.
-
-    // And nothing should be left in the active window state.
-    assertTrue(tester.hasNoActiveWindows());
-
-    // Now the garbage collection timer will fire, finding the trigger already closed.
-    tester.advanceInputWatermark(new Instant(100));
-
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertThat(output.size(), equalTo(1));
-    assertThat(output.get(0),
-               isSingleWindowedValue(containsInAnyOrder(1),
-                                     1, // timestamp
-                                     1, // window start
-                                     11)); // window end
-    assertThat(
-        output.get(0).getPane(),
-        equalTo(PaneInfo.createPane(true, true, Timing.ON_TIME, 0, 0)));
-  }
-
-  /**
-   * When a merged window's trigger is closed we record that state using the merged window rather
-   * than the original windows.
-   */
-  @Test
-  public void testMergingWithClosedRepresentative() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(Sessions.withGapDuration(Duration.millis(10)), mockTrigger,
-                                    AccumulationMode.DISCARDING_FIRED_PANES, Duration.millis(50),
-                                    ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    // 2 elements into merged session window.
-    // Close the trigger, but the garbage collection timer is still pending.
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    tester.injectElements(TimestampedValue.of(1, new Instant(1)),       // in [1, 11), gc at 21.
-                          TimestampedValue.of(8, new Instant(8)));      // in [8, 18), gc at 28.
-
-    // More elements into the same merged session window.
-    // It has not yet been gced.
-    // Should be discarded with 'window closed'.
-    tester.injectElements(TimestampedValue.of(1, new Instant(1)),      // in [1, 11), gc at 21.
-                          TimestampedValue.of(2, new Instant(2)),      // in [2, 12), gc at 22.
-                          TimestampedValue.of(8, new Instant(8)));     // in [8, 18), gc at 28.
-
-    // Now the garbage collection timer will fire, finding the trigger already closed.
-    tester.advanceInputWatermark(new Instant(100));
-
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-
-    assertThat(output.size(), equalTo(1));
-    assertThat(output.get(0),
-               isSingleWindowedValue(containsInAnyOrder(1, 8),
-                                     1, // timestamp
-                                     1, // window start
-                                     18)); // window end
-    assertThat(
-        output.get(0).getPane(),
-        equalTo(PaneInfo.createPane(true, true, Timing.EARLY, 0, 0)));
-  }
-
-  /**
-   * If an element for a closed session window ends up being merged into other still-open
-   * session windows, the resulting session window is not 'poisoned'.
-   */
-  @Test
-  public void testMergingWithClosedDoesNotPoison() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(Sessions.withGapDuration(Duration.millis(10)), mockTrigger,
-            AccumulationMode.DISCARDING_FIRED_PANES, Duration.millis(50),
-            ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    // 1 element, force its trigger to close.
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    tester.injectElements(TimestampedValue.of(2, new Instant(2)));
-
-    // 3 elements, one already closed.
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(false);
-    tester.injectElements(TimestampedValue.of(1, new Instant(1)),
-        TimestampedValue.of(2, new Instant(2)),
-        TimestampedValue.of(3, new Instant(3)));
-
-    tester.advanceInputWatermark(new Instant(100));
-
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertThat(output.size(), equalTo(2));
-    assertThat(output.get(0),
-        isSingleWindowedValue(containsInAnyOrder(2),
-            2, // timestamp
-            2, // window start
-            12)); // window end
-    assertThat(
-        output.get(0).getPane(),
-        equalTo(PaneInfo.createPane(true, true, Timing.EARLY, 0, 0)));
-    assertThat(output.get(1),
-        isSingleWindowedValue(containsInAnyOrder(1, 2, 3),
-            1, // timestamp
-            1, // window start
-            13)); // window end
-    assertThat(
-        output.get(1).getPane(),
-        equalTo(PaneInfo.createPane(true, true, Timing.ON_TIME, 0, 0)));
-  }
-
-  /**
-   * Tests that when data is assigned to multiple windows but some of those windows have
-   * had their triggers finish, then the data is dropped and counted accurately.
-   */
-  @Test
-  public void testDropDataMultipleWindowsFinishedTrigger() throws Exception {
-    ReduceFnTester<Integer, Integer, IntervalWindow> tester = ReduceFnTester.combining(
-        WindowingStrategy.of(
-            SlidingWindows.of(Duration.millis(100)).every(Duration.millis(30)))
-        .withTrigger(AfterWatermark.pastEndOfWindow())
-        .withAllowedLateness(Duration.millis(1000)),
-        new Sum.SumIntegerFn().<String>asKeyedFn(), VarIntCoder.of());
-
-    tester.injectElements(
-        // assigned to [-60, 40), [-30, 70), [0, 100)
-        TimestampedValue.of(10, new Instant(23)),
-        // assigned to [-30, 70), [0, 100), [30, 130)
-        TimestampedValue.of(12, new Instant(40)));
-
-    assertEquals(0, tester.getElementsDroppedDueToClosedWindow());
-
-    tester.advanceInputWatermark(new Instant(70));
-    tester.injectElements(
-        // assigned to [-30, 70), [0, 100), [30, 130)
-        // but [-30, 70) is closed by the trigger
-        TimestampedValue.of(14, new Instant(60)));
-
-    assertEquals(1, tester.getElementsDroppedDueToClosedWindow());
-
-    tester.advanceInputWatermark(new Instant(130));
-    // assigned to [-30, 70), [0, 100), [30, 130)
-    // but they are all closed
-    tester.injectElements(TimestampedValue.of(16, new Instant(40)));
-
-    assertEquals(4, tester.getElementsDroppedDueToClosedWindow());
-  }
-
-  @Test
-  public void testIdempotentEmptyPanesDiscarding() throws Exception {
-    // Test uninteresting (empty) panes don't increment the index or otherwise
-    // modify PaneInfo.
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(FixedWindows.of(Duration.millis(10)), mockTrigger,
-            AccumulationMode.DISCARDING_FIRED_PANES, Duration.millis(100),
-            ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    // Inject a couple of on-time elements and fire at the window end.
-    injectElement(tester, 1);
-    injectElement(tester, 2);
-    tester.advanceInputWatermark(new Instant(12));
-
-    // Fire the on-time pane
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    tester.fireTimer(firstWindow, new Instant(9), TimeDomain.EVENT_TIME);
-
-    // Fire another timer (with no data, so it's an uninteresting pane that should not be output).
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    tester.fireTimer(firstWindow, new Instant(9), TimeDomain.EVENT_TIME);
-
-    // Finish it off with another datum.
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    injectElement(tester, 3);
-
-    // The intermediate trigger firing shouldn't result in any output.
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertThat(output.size(), equalTo(2));
-
-    // The on-time pane is as expected.
-    assertThat(output.get(0), isSingleWindowedValue(containsInAnyOrder(1, 2), 1, 0, 10));
-
-    // The late pane has the correct indices.
-    assertThat(output.get(1).getValue(), contains(3));
-    assertThat(
-        output.get(1).getPane(), equalTo(PaneInfo.createPane(false, true, Timing.LATE, 1, 1)));
-
-    assertTrue(tester.isMarkedFinished(firstWindow));
-    tester.assertHasOnlyGlobalAndFinishedSetsFor(firstWindow);
-
-    assertEquals(0, tester.getElementsDroppedDueToClosedWindow());
-  }
-
-  @Test
-  public void testIdempotentEmptyPanesAccumulating() throws Exception {
-    // Test uninteresting (empty) panes don't increment the index or otherwise
-    // modify PaneInfo.
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(FixedWindows.of(Duration.millis(10)), mockTrigger,
-            AccumulationMode.ACCUMULATING_FIRED_PANES, Duration.millis(100),
-            ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    // Inject a couple of on-time elements and fire at the window end.
-    injectElement(tester, 1);
-    injectElement(tester, 2);
-    tester.advanceInputWatermark(new Instant(12));
-
-    // Trigger the on-time pane
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    tester.fireTimer(firstWindow, new Instant(9), TimeDomain.EVENT_TIME);
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertThat(output.size(), equalTo(1));
-    assertThat(output.get(0), isSingleWindowedValue(containsInAnyOrder(1, 2), 1, 0, 10));
-    assertThat(output.get(0).getPane(),
-        equalTo(PaneInfo.createPane(true, false, Timing.ON_TIME, 0, 0)));
-
-    // Fire another timer with no data; the empty pane should not be output even though the
-    // trigger is ready to fire
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    tester.fireTimer(firstWindow, new Instant(9), TimeDomain.EVENT_TIME);
-    assertThat(tester.extractOutput().size(), equalTo(0));
-
-    // Finish it off with another datum, which is late
-    when(mockTrigger.shouldFire(anyTriggerContext())).thenReturn(true);
-    triggerShouldFinish(mockTrigger);
-    injectElement(tester, 3);
-    output = tester.extractOutput();
-    assertThat(output.size(), equalTo(1));
-
-    // The late pane has the correct indices.
-    assertThat(output.get(0).getValue(), containsInAnyOrder(1, 2, 3));
-    assertThat(output.get(0).getPane(),
-        equalTo(PaneInfo.createPane(false, true, Timing.LATE, 1, 1)));
-
-    assertTrue(tester.isMarkedFinished(firstWindow));
-    tester.assertHasOnlyGlobalAndFinishedSetsFor(firstWindow);
-
-    assertEquals(0, tester.getElementsDroppedDueToClosedWindow());
-  }
-
-  /**
-   * Test that we receive an empty on-time pane when an or-finally waiting for the watermark fires.
-   * Specifically, verify the proper triggerings and pane-info of a typical speculative/on-time/late
-   * when the on-time pane is empty.
-   */
-  @Test
-  public void testEmptyOnTimeFromOrFinally() throws Exception {
-    ReduceFnTester<Integer, Integer, IntervalWindow> tester =
-        ReduceFnTester.combining(FixedWindows.of(Duration.millis(10)),
-            AfterEach.<IntervalWindow>inOrder(
-                Repeatedly
-                    .forever(
-                        AfterProcessingTime.pastFirstElementInPane().plusDelayOf(
-                            new Duration(5)))
-                    .orFinally(AfterWatermark.pastEndOfWindow()),
-                Repeatedly.forever(
-                    AfterProcessingTime.pastFirstElementInPane().plusDelayOf(
-                        new Duration(25)))),
-            AccumulationMode.ACCUMULATING_FIRED_PANES, new Sum.SumIntegerFn().<String>asKeyedFn(),
-            VarIntCoder.of(), Duration.millis(100));
-
-    tester.advanceInputWatermark(new Instant(0));
-    tester.advanceProcessingTime(new Instant(0));
-
-    // Processing time timer for 5
-    tester.injectElements(
-        TimestampedValue.of(1, new Instant(1)),
-        TimestampedValue.of(1, new Instant(3)),
-        TimestampedValue.of(1, new Instant(7)),
-        TimestampedValue.of(1, new Instant(5)));
-
-    // Should fire early pane
-    tester.advanceProcessingTime(new Instant(6));
-
-    // Should fire empty on time pane
-    tester.advanceInputWatermark(new Instant(11));
-    List<WindowedValue<Integer>> output = tester.extractOutput();
-    assertEquals(2, output.size());
-
-    assertThat(output.get(0), WindowMatchers.isSingleWindowedValue(4, 1, 0, 10));
-    assertThat(output.get(1), WindowMatchers.isSingleWindowedValue(4, 9, 0, 10));
-
-    assertThat(
-        output.get(0),
-        WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(true, false, Timing.EARLY, 0, -1)));
-    assertThat(
-        output.get(1),
-        WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(false, false, Timing.ON_TIME, 1, 0)));
-  }
-
-  /**
-   * Tests for processing time firings after the watermark passes the end of the window.
-   * Specifically, verify the proper triggerings and pane-info of a typical speculative/on-time/late
-   * when the on-time pane is non-empty.
-   */
-  @Test
-  public void testProcessingTime() throws Exception {
-    ReduceFnTester<Integer, Integer, IntervalWindow> tester =
-        ReduceFnTester.combining(FixedWindows.of(Duration.millis(10)),
-            AfterEach.<IntervalWindow>inOrder(
-                Repeatedly
-                    .forever(
-                        AfterProcessingTime.pastFirstElementInPane().plusDelayOf(
-                            new Duration(5)))
-                    .orFinally(AfterWatermark.pastEndOfWindow()),
-                Repeatedly.forever(
-                    AfterProcessingTime.pastFirstElementInPane().plusDelayOf(
-                        new Duration(25)))),
-            AccumulationMode.ACCUMULATING_FIRED_PANES, new Sum.SumIntegerFn().<String>asKeyedFn(),
-            VarIntCoder.of(), Duration.millis(100));
-
-    tester.advanceInputWatermark(new Instant(0));
-    tester.advanceProcessingTime(new Instant(0));
-
-    tester.injectElements(TimestampedValue.of(1, new Instant(1)),
-        TimestampedValue.of(1, new Instant(3)), TimestampedValue.of(1, new Instant(7)),
-        TimestampedValue.of(1, new Instant(5)));
-    // 4 elements all at processing time 0
-
-    tester.advanceProcessingTime(new Instant(6)); // fire [1,3,7,5] since 6 > 0 + 5
-    tester.injectElements(
-        TimestampedValue.of(1, new Instant(8)),
-        TimestampedValue.of(1, new Instant(4)));
-    // 6 elements
-
-    tester.advanceInputWatermark(new Instant(11)); // fire [1,3,7,5,8,4] since 11 > 9
-    tester.injectElements(
-        TimestampedValue.of(1, new Instant(8)),
-        TimestampedValue.of(1, new Instant(4)),
-        TimestampedValue.of(1, new Instant(5)));
-    // 9 elements
-
-    tester.advanceInputWatermark(new Instant(12));
-    tester.injectElements(
-        TimestampedValue.of(1, new Instant(3)));
-    // 10 elements
-
-    tester.advanceProcessingTime(new Instant(15));
-    tester.injectElements(
-        TimestampedValue.of(1, new Instant(5)));
-    // 11 elements
-    tester.advanceProcessingTime(new Instant(32)); // fire since 32 > 6 + 25
-
-    tester.injectElements(
-        TimestampedValue.of(1, new Instant(3)));
-    // 12 elements
-    // fire [1,3,7,5,8,4,8,4,5,3,5,3] since 125 > 6 + 25
-    tester.advanceInputWatermark(new Instant(125));
-
-    List<WindowedValue<Integer>> output = tester.extractOutput();
-    assertEquals(4, output.size());
-
-    assertThat(output.get(0), WindowMatchers.isSingleWindowedValue(4, 1, 0, 10));
-    assertThat(output.get(1), WindowMatchers.isSingleWindowedValue(6, 4, 0, 10));
-    assertThat(output.get(2), WindowMatchers.isSingleWindowedValue(11, 9, 0, 10));
-    assertThat(output.get(3), WindowMatchers.isSingleWindowedValue(12, 9, 0, 10));
-
-    assertThat(
-        output.get(0),
-        WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(true, false, Timing.EARLY, 0, -1)));
-    assertThat(
-        output.get(1),
-        WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(false, false, Timing.ON_TIME, 1, 0)));
-    assertThat(
-        output.get(2),
-        WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(false, false, Timing.LATE, 2, 1)));
-    assertThat(
-        output.get(3),
-        WindowMatchers.valueWithPaneInfo(PaneInfo.createPane(false, true, Timing.LATE, 3, 2)));
-  }
-
-  /**
-   * We should fire a non-empty ON_TIME pane in the GlobalWindow when the watermark moves to
-   * end-of-time.
-   */
-  @Test
-  public void fireNonEmptyOnDrainInGlobalWindow() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, GlobalWindow> tester =
-        ReduceFnTester.nonCombining(
-            WindowingStrategy.of(new GlobalWindows())
-                             .withTrigger(Repeatedly.<GlobalWindow>forever(
-                                 AfterPane.elementCountAtLeast(3)))
-                             .withMode(AccumulationMode.DISCARDING_FIRED_PANES));
-
-    tester.advanceInputWatermark(new Instant(0));
-
-    final int n = 20;
-    for (int i = 0; i < n; i++) {
-      tester.injectElements(TimestampedValue.of(i, new Instant(i)));
-    }
-
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertEquals(n / 3, output.size());
-    for (int i = 0; i < output.size(); i++) {
-      assertEquals(Timing.EARLY, output.get(i).getPane().getTiming());
-      assertEquals(i, output.get(i).getPane().getIndex());
-      assertEquals(3, Iterables.size(output.get(i).getValue()));
-    }
-
-    tester.advanceInputWatermark(BoundedWindow.TIMESTAMP_MAX_VALUE);
-
-    output = tester.extractOutput();
-    assertEquals(1, output.size());
-    assertEquals(Timing.ON_TIME, output.get(0).getPane().getTiming());
-    assertEquals(n / 3, output.get(0).getPane().getIndex());
-    assertEquals(n - ((n / 3) * 3), Iterables.size(output.get(0).getValue()));
-  }
-
-  /**
-   * We should fire an empty ON_TIME pane in the GlobalWindow when the watermark moves to
-   * end-of-time.
-   */
-  @Test
-  public void fireEmptyOnDrainInGlobalWindowIfRequested() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, GlobalWindow> tester =
-        ReduceFnTester.nonCombining(
-            WindowingStrategy.of(new GlobalWindows())
-                             .withTrigger(Repeatedly.<GlobalWindow>forever(
-                                 AfterProcessingTime.pastFirstElementInPane().plusDelayOf(
-                                     new Duration(3))))
-                             .withMode(AccumulationMode.DISCARDING_FIRED_PANES));
-
-    final int n = 20;
-    for (int i = 0; i < n; i++) {
-      tester.advanceProcessingTime(new Instant(i));
-      tester.injectElements(TimestampedValue.of(i, new Instant(i)));
-    }
-    tester.advanceProcessingTime(new Instant(n + 4));
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertEquals((n + 3) / 4, output.size());
-    for (int i = 0; i < output.size(); i++) {
-      assertEquals(Timing.EARLY, output.get(i).getPane().getTiming());
-      assertEquals(i, output.get(i).getPane().getIndex());
-      assertEquals(4, Iterables.size(output.get(i).getValue()));
-    }
-
-    tester.advanceInputWatermark(BoundedWindow.TIMESTAMP_MAX_VALUE);
-
-    output = tester.extractOutput();
-    assertEquals(1, output.size());
-    assertEquals(Timing.ON_TIME, output.get(0).getPane().getTiming());
-    assertEquals((n + 3) / 4, output.get(0).getPane().getIndex());
-    assertEquals(0, Iterables.size(output.get(0).getValue()));
-  }
-
-  /**
-   * Late elements should still have a garbage collection hold set so that they
-   * can make a late pane rather than be dropped due to lateness.
-   */
-  @Test
-  public void setGarbageCollectionHoldOnLateElements() throws Exception {
-    ReduceFnTester<Integer, Iterable<Integer>, IntervalWindow> tester =
-        ReduceFnTester.nonCombining(
-            FixedWindows.of(Duration.millis(10)),
-            AfterWatermark.pastEndOfWindow().withLateFirings(AfterPane.elementCountAtLeast(2)),
-            AccumulationMode.DISCARDING_FIRED_PANES,
-            Duration.millis(100),
-            ClosingBehavior.FIRE_IF_NON_EMPTY);
-
-    tester.advanceInputWatermark(new Instant(0));
-    tester.advanceOutputWatermark(new Instant(0));
-    tester.injectElements(TimestampedValue.of(1,  new Instant(1)));
-
-    // Fire ON_TIME pane @ 9 with 1
-
-    tester.advanceInputWatermark(new Instant(109));
-    tester.advanceOutputWatermark(new Instant(109));
-    tester.injectElements(TimestampedValue.of(2,  new Instant(2)));
-    // We should have set a garbage collection hold for the final pane.
-    Instant hold = tester.getWatermarkHold();
-    assertEquals(new Instant(109), hold);
-
-    tester.advanceInputWatermark(new Instant(110));
-    tester.advanceOutputWatermark(new Instant(110));
-
-    // Fire final LATE pane @ 9 with 2
-
-    List<WindowedValue<Iterable<Integer>>> output = tester.extractOutput();
-    assertEquals(2, output.size());
-  }
-
-  private static class SumAndVerifyContextFn extends CombineFnWithContext<Integer, int[], Integer> {
-
-    private final PCollectionView<Integer> view;
-    private final int expectedValue;
-
-    private SumAndVerifyContextFn(PCollectionView<Integer> view, int expectedValue) {
-      this.view = view;
-      this.expectedValue = expectedValue;
-    }
-    @Override
-    public int[] createAccumulator(Context c) {
-      checkArgument(
-          c.getPipelineOptions().as(TestOptions.class).getValue() == expectedValue);
-      checkArgument(c.sideInput(view) == expectedValue);
-      return wrap(0);
-    }
-
-    @Override
-    public int[] addInput(int[] accumulator, Integer input, Context c) {
-      checkArgument(
-          c.getPipelineOptions().as(TestOptions.class).getValue() == expectedValue);
-      checkArgument(c.sideInput(view) == expectedValue);
-      accumulator[0] += input.intValue();
-      return accumulator;
-    }
-
-    @Override
-    public int[] mergeAccumulators(Iterable<int[]> accumulators, Context c) {
-      checkArgument(
-          c.getPipelineOptions().as(TestOptions.class).getValue() == expectedValue);
-      checkArgument(c.sideInput(view) == expectedValue);
-      Iterator<int[]> iter = accumulators.iterator();
-      if (!iter.hasNext()) {
-        return createAccumulator(c);
-      } else {
-        int[] running = iter.next();
-        while (iter.hasNext()) {
-          running[0] += iter.next()[0];
-        }
-        return running;
-      }
-    }
-
-    @Override
-    public Integer extractOutput(int[] accumulator, Context c) {
-      checkArgument(
-          c.getPipelineOptions().as(TestOptions.class).getValue() == expectedValue);
-      checkArgument(c.sideInput(view) == expectedValue);
-      return accumulator[0];
-    }
-
-    private int[] wrap(int value) {
-      return new int[] { value };
-    }
-  }
-
-  /**
-   * A {@link PipelineOptions} to test combining with context.
-   */
-  public interface TestOptions extends PipelineOptions {
-    Integer getValue();
-    void setValue(Integer value);
-  }
-}


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