| /* |
| * 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.transforms.windowing; |
| |
| import static org.apache.beam.sdk.testing.WindowFnTestUtils.runWindowFn; |
| import static org.apache.beam.sdk.testing.WindowFnTestUtils.set; |
| import static org.apache.beam.sdk.transforms.display.DisplayDataMatchers.hasDisplayItem; |
| import static org.hamcrest.Matchers.allOf; |
| import static org.hamcrest.Matchers.containsString; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertThat; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import org.apache.beam.sdk.testing.WindowFnTestUtils; |
| import org.apache.beam.sdk.transforms.display.DisplayData; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.collect.ImmutableList; |
| import org.joda.time.Duration; |
| import org.joda.time.Instant; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.ExpectedException; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests for Sessions WindowFn. */ |
| @RunWith(JUnit4.class) |
| public class SessionsTest { |
| @Rule public ExpectedException thrown = ExpectedException.none(); |
| |
| @Test |
| public void testSimple() throws Exception { |
| Map<IntervalWindow, Set<String>> expected = new HashMap<>(); |
| expected.put(new IntervalWindow(new Instant(0), new Instant(10)), set(0)); |
| expected.put(new IntervalWindow(new Instant(10), new Instant(20)), set(10)); |
| expected.put(new IntervalWindow(new Instant(101), new Instant(111)), set(101)); |
| assertEquals( |
| expected, |
| runWindowFn(Sessions.withGapDuration(new Duration(10)), Arrays.asList(0L, 10L, 101L))); |
| } |
| |
| @Test |
| public void testConsecutive() throws Exception { |
| Map<IntervalWindow, Set<String>> expected = new HashMap<>(); |
| expected.put(new IntervalWindow(new Instant(1), new Instant(19)), set(1, 2, 5, 9)); |
| expected.put(new IntervalWindow(new Instant(100), new Instant(111)), set(100, 101)); |
| assertEquals( |
| expected, |
| runWindowFn( |
| Sessions.withGapDuration(new Duration(10)), Arrays.asList(1L, 2L, 5L, 9L, 100L, 101L))); |
| } |
| |
| @Test |
| public void testMerging() throws Exception { |
| Map<IntervalWindow, Set<String>> expected = new HashMap<>(); |
| expected.put(new IntervalWindow(new Instant(1), new Instant(40)), set(1, 10, 15, 22, 30)); |
| expected.put(new IntervalWindow(new Instant(95), new Instant(111)), set(95, 100, 101)); |
| assertEquals( |
| expected, |
| runWindowFn( |
| Sessions.withGapDuration(new Duration(10)), |
| Arrays.asList(1L, 15L, 30L, 100L, 101L, 95L, 22L, 10L))); |
| } |
| |
| @Test |
| public void testTimeUnit() throws Exception { |
| Map<IntervalWindow, Set<String>> expected = new HashMap<>(); |
| expected.put(new IntervalWindow(new Instant(1), new Instant(2000)), set(1, 2, 1000)); |
| expected.put(new IntervalWindow(new Instant(5000), new Instant(6001)), set(5000, 5001)); |
| expected.put(new IntervalWindow(new Instant(10000), new Instant(11000)), set(10000)); |
| assertEquals( |
| expected, |
| runWindowFn( |
| Sessions.withGapDuration(Duration.standardSeconds(1)), |
| Arrays.asList(1L, 2L, 1000L, 5000L, 5001L, 10000L))); |
| } |
| |
| @Test |
| public void testEquality() { |
| assertTrue( |
| Sessions.withGapDuration(new Duration(10)) |
| .isCompatible(Sessions.withGapDuration(new Duration(10)))); |
| assertTrue( |
| Sessions.withGapDuration(new Duration(10)) |
| .isCompatible(Sessions.withGapDuration(new Duration(20)))); |
| } |
| |
| @Test |
| public void testVerifyCompatibility() throws IncompatibleWindowException { |
| Sessions.withGapDuration(new Duration(10)) |
| .verifyCompatibility(Sessions.withGapDuration(new Duration(10))); |
| |
| thrown.expect(IncompatibleWindowException.class); |
| Sessions.withGapDuration(new Duration(10)) |
| .verifyCompatibility(FixedWindows.of(new Duration(10))); |
| } |
| |
| /** Validates that the output timestamp for aggregate data falls within the acceptable range. */ |
| @Test |
| public void testValidOutputTimes() throws Exception { |
| for (long timestamp : Arrays.asList(200, 800, 700)) { |
| WindowFnTestUtils.validateGetOutputTimestamp( |
| Sessions.withGapDuration(Duration.millis(500)), timestamp); |
| } |
| } |
| |
| /** |
| * Test to confirm that {@link Sessions} with the default {@link TimestampCombiner} holds up the |
| * watermark potentially indefinitely. |
| */ |
| @Test |
| public void testInvalidOutputAtEarliest() throws Exception { |
| try { |
| WindowFnTestUtils.validateGetOutputTimestamps( |
| Sessions.withGapDuration(Duration.millis(10)), |
| TimestampCombiner.EARLIEST, |
| ImmutableList.of( |
| (List<Long>) ImmutableList.of(1L, 3L), |
| (List<Long>) ImmutableList.of(0L, 5L, 10L, 15L, 20L))); |
| } catch (AssertionError exc) { |
| assertThat( |
| exc.getMessage(), |
| // These are the non-volatile pieces of the error message that a timestamp |
| // was not greater than what it should be. |
| allOf(containsString("a value greater than"), containsString("was less than"))); |
| } |
| } |
| |
| /** |
| * When a user explicitly requests per-key aggregate values have their derived timestamp to be the |
| * end of the window (instead of the earliest possible), the session here should not hold each |
| * other up, even though they overlap. |
| */ |
| @Test |
| public void testValidOutputAtEndTimes() throws Exception { |
| WindowFnTestUtils.validateGetOutputTimestamps( |
| Sessions.withGapDuration(Duration.millis(10)), |
| TimestampCombiner.END_OF_WINDOW, |
| ImmutableList.of( |
| (List<Long>) ImmutableList.of(1L, 3L), |
| (List<Long>) ImmutableList.of(0L, 5L, 10L, 15L, 20L))); |
| } |
| |
| @Test |
| public void testDisplayData() { |
| Duration gapDuration = Duration.standardMinutes(234); |
| Sessions session = Sessions.withGapDuration(gapDuration); |
| assertThat(DisplayData.from(session), hasDisplayItem("gapDuration", gapDuration)); |
| } |
| } |