/* * 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.kafka.streams.kstream.internals; import org.apache.kafka.common.serialization.Serde; import org.apache.kafka.common.serialization.Serdes; import org.apache.kafka.streams.kstream.JoinWindows; import org.apache.kafka.streams.kstream.KStream; import org.apache.kafka.streams.kstream.KStreamBuilder; import org.apache.kafka.streams.processor.internals.ProcessorRecordContext; import org.apache.kafka.test.KStreamTestDriver; import org.apache.kafka.test.MockProcessorContext; import org.apache.kafka.test.MockProcessorSupplier; import org.apache.kafka.test.MockValueJoiner; import org.apache.kafka.test.TestUtils; import org.junit.After; import org.junit.Before; import org.junit.Test; import java.io.File; import java.io.IOException; import java.util.Arrays; import java.util.Collection; import java.util.HashSet; import java.util.Set; import static org.junit.Assert.assertEquals; public class KStreamKStreamJoinTest { final private String topic1 = "topic1"; final private String topic2 = "topic2"; final private Serde<Integer> intSerde = Serdes.Integer(); final private Serde<String> stringSerde = Serdes.String(); private KStreamTestDriver driver = null; private File stateDir = null; @After public void tearDown() { if (driver != null) { driver.close(); } driver = null; } @Before public void setUp() throws IOException { stateDir = TestUtils.tempDirectory("kafka-test"); } @Test public void testJoin() throws Exception { KStreamBuilder builder = new KStreamBuilder(); final int[] expectedKeys = new int[]{0, 1, 2, 3}; KStream<Integer, String> stream1; KStream<Integer, String> stream2; KStream<Integer, String> joined; MockProcessorSupplier<Integer, String> processor; processor = new MockProcessorSupplier<>(); stream1 = builder.stream(intSerde, stringSerde, topic1); stream2 = builder.stream(intSerde, stringSerde, topic2); joined = stream1.join(stream2, MockValueJoiner.TOSTRING_JOINER, JoinWindows.of(100), intSerde, stringSerde, stringSerde); joined.process(processor); Collection<Set<String>> copartitionGroups = builder.copartitionGroups(); assertEquals(1, copartitionGroups.size()); assertEquals(new HashSet<>(Arrays.asList(topic1, topic2)), copartitionGroups.iterator().next()); driver = new KStreamTestDriver(builder, stateDir); driver.setTime(0L); // push two items to the primary stream. the other window is empty // w1 = {} // w2 = {} // --> w1 = { 0:X0, 1:X1 } // w2 = {} for (int i = 0; i < 2; i++) { driver.process(topic1, expectedKeys[i], "X" + expectedKeys[i]); } processor.checkAndClearProcessResult(); // push two items to the other stream. this should produce two items. // w1 = { 0:X0, 1:X1 } // w2 = {} // --> w1 = { 0:X0, 1:X1 } // w2 = { 0:Y0, 1:Y1 } for (int i = 0; i < 2; i++) { driver.process(topic2, expectedKeys[i], "Y" + expectedKeys[i]); } processor.checkAndClearProcessResult("0:X0+Y0", "1:X1+Y1"); // push all four items to the primary stream. this should produce two items. // w1 = { 0:X0, 1:X1 } // w2 = { 0:Y0, 1:Y1 } // --> w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3 } // w2 = { 0:Y0, 1:Y1 } for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "X" + expectedKey); } processor.checkAndClearProcessResult("0:X0+Y0", "1:X1+Y1"); // push all items to the other stream. this should produce six items. // w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3 } // w2 = { 0:Y0, 1:Y1 } // --> w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3 } // w2 = { 0:Y0, 1:Y1, 0:YY0, 1:YY1, 2:YY2, 3:YY3 } for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "0:X0+YY0", "1:X1+YY1", "1:X1+YY1", "2:X2+YY2", "3:X3+YY3"); // push all four items to the primary stream. this should produce six items. // w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3 } // w2 = { 0:Y0, 1:Y1, 0:YY0, 0:YY0, 1:YY1, 2:YY2, 3:YY3 // --> w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3, 0:XX0, 1:XX1, 2:XX2, 3:XX3 } // w2 = { 0:Y0, 1:Y1, 0:YY0, 1:YY1, 2:YY2, 3:YY3 } for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "XX" + expectedKey); } processor.checkAndClearProcessResult("0:XX0+Y0", "0:XX0+YY0", "1:XX1+Y1", "1:XX1+YY1", "2:XX2+YY2", "3:XX3+YY3"); // push two items to the other stream. this should produce six item. // w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3, 0:XX0, 1:XX1, 2:XX2, 3:XX3 } // w2 = { 0:Y0, 1:Y1, 0:YY0, 0:YY0, 1:YY1, 2:YY2, 3:YY3 // --> w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3, 0:XX0, 1:XX1, 2:XX2, 3:XX3 } // w2 = { 0:Y0, 1:Y1, 0:YY0, 1:YY1, 2:YY2, 3:YY3, 0:YYY0, 1:YYY1 } for (int i = 0; i < 2; i++) { driver.process(topic2, expectedKeys[i], "YYY" + expectedKeys[i]); } processor.checkAndClearProcessResult("0:X0+YYY0", "0:X0+YYY0", "0:XX0+YYY0", "1:X1+YYY1", "1:X1+YYY1", "1:XX1+YYY1"); } @Test public void testOuterJoin() throws Exception { KStreamBuilder builder = new KStreamBuilder(); final int[] expectedKeys = new int[]{0, 1, 2, 3}; KStream<Integer, String> stream1; KStream<Integer, String> stream2; KStream<Integer, String> joined; MockProcessorSupplier<Integer, String> processor; processor = new MockProcessorSupplier<>(); stream1 = builder.stream(intSerde, stringSerde, topic1); stream2 = builder.stream(intSerde, stringSerde, topic2); joined = stream1.outerJoin(stream2, MockValueJoiner.TOSTRING_JOINER, JoinWindows.of(100), intSerde, stringSerde, stringSerde); joined.process(processor); Collection<Set<String>> copartitionGroups = builder.copartitionGroups(); assertEquals(1, copartitionGroups.size()); assertEquals(new HashSet<>(Arrays.asList(topic1, topic2)), copartitionGroups.iterator().next()); driver = new KStreamTestDriver(builder, stateDir); driver.setTime(0L); // push two items to the primary stream. the other window is empty.this should produce two items // w1 = {} // w2 = {} // --> w1 = { 0:X0, 1:X1 } // w2 = {} for (int i = 0; i < 2; i++) { driver.process(topic1, expectedKeys[i], "X" + expectedKeys[i]); } processor.checkAndClearProcessResult("0:X0+null", "1:X1+null"); // push two items to the other stream. this should produce two items. // w1 = { 0:X0, 1:X1 } // w2 = {} // --> w1 = { 0:X0, 1:X1 } // w2 = { 0:Y0, 1:Y1 } for (int i = 0; i < 2; i++) { driver.process(topic2, expectedKeys[i], "Y" + expectedKeys[i]); } processor.checkAndClearProcessResult("0:X0+Y0", "1:X1+Y1"); // push all four items to the primary stream. this should produce four items. // w1 = { 0:X0, 1:X1 } // w2 = { 0:Y0, 1:Y1 } // --> w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3 } // w2 = { 0:Y0, 1:Y1 } for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "X" + expectedKey); } processor.checkAndClearProcessResult("0:X0+Y0", "1:X1+Y1", "2:X2+null", "3:X3+null"); // push all items to the other stream. this should produce six items. // w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3 } // w2 = { 0:Y0, 1:Y1 } // --> w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3 } // w2 = { 0:Y0, 1:Y1, 0:YY0, 0:YY0, 1:YY1, 2:YY2, 3:YY3 } for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "0:X0+YY0", "1:X1+YY1", "1:X1+YY1", "2:X2+YY2", "3:X3+YY3"); // push all four items to the primary stream. this should produce six items. // w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3 } // w2 = { 0:Y0, 1:Y1, 0:YY0, 0:YY0, 1:YY1, 2:YY2, 3:YY3 // --> w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3, 0:XX0, 1:XX1, 2:XX2, 3:XX3 } // w2 = { 0:Y0, 1:Y1, 0:YY0, 0:YY0, 1:YY1, 2:YY2, 3:YY3 } for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "XX" + expectedKey); } processor.checkAndClearProcessResult("0:XX0+Y0", "0:XX0+YY0", "1:XX1+Y1", "1:XX1+YY1", "2:XX2+YY2", "3:XX3+YY3"); // push two items to the other stream. this should produce six item. // w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3, 0:XX0, 1:XX1, 2:XX2, 3:XX3 } // w2 = { 0:Y0, 1:Y1, 0:YY0, 0:YY0, 1:YY1, 2:YY2, 3:YY3 // --> w1 = { 0:X0, 1:X1, 0:X0, 1:X1, 2:X2, 3:X3, 0:XX0, 1:XX1, 2:XX2, 3:XX3 } // w2 = { 0:Y0, 1:Y1, 0:YY0, 0:YY0, 1:YY1, 2:YY2, 3:YY3, 0:YYY0, 1:YYY1 } for (int i = 0; i < 2; i++) { driver.process(topic2, expectedKeys[i], "YYY" + expectedKeys[i]); } processor.checkAndClearProcessResult("0:X0+YYY0", "0:X0+YYY0", "0:XX0+YYY0", "1:X1+YYY1", "1:X1+YYY1", "1:XX1+YYY1"); } @Test public void testWindowing() throws Exception { long time = 0L; KStreamBuilder builder = new KStreamBuilder(); final int[] expectedKeys = new int[]{0, 1, 2, 3}; KStream<Integer, String> stream1; KStream<Integer, String> stream2; KStream<Integer, String> joined; MockProcessorSupplier<Integer, String> processor; processor = new MockProcessorSupplier<>(); stream1 = builder.stream(intSerde, stringSerde, topic1); stream2 = builder.stream(intSerde, stringSerde, topic2); joined = stream1.join(stream2, MockValueJoiner.TOSTRING_JOINER, JoinWindows.of(100), intSerde, stringSerde, stringSerde); joined.process(processor); Collection<Set<String>> copartitionGroups = builder.copartitionGroups(); assertEquals(1, copartitionGroups.size()); assertEquals(new HashSet<>(Arrays.asList(topic1, topic2)), copartitionGroups.iterator().next()); driver = new KStreamTestDriver(builder, stateDir); // push two items to the primary stream. the other window is empty. this should produce no items. // w1 = {} // w2 = {} // --> w1 = { 0:X0, 1:X1 } // w2 = {} setRecordContext(time, topic1); for (int i = 0; i < 2; i++) { driver.process(topic1, expectedKeys[i], "X" + expectedKeys[i]); } processor.checkAndClearProcessResult(); // push two items to the other stream. this should produce two items. // w1 = { 0:X0, 1:X1 } // w2 = {} // --> w1 = { 0:X0, 1:X1 } // w2 = { 0:Y0, 1:Y1 } setRecordContext(time, topic2); for (int i = 0; i < 2; i++) { driver.process(topic2, expectedKeys[i], "Y" + expectedKeys[i]); } processor.checkAndClearProcessResult("0:X0+Y0", "1:X1+Y1"); // clear logically time = 1000L; setRecordContext(time, topic1); for (int i = 0; i < expectedKeys.length; i++) { setRecordContext(time + i, topic1); driver.process(topic1, expectedKeys[i], "X" + expectedKeys[i]); } processor.checkAndClearProcessResult(); // gradually expires items in w1 // w1 = { 0:X0, 1:X1, 2:X2, 3:X3 } time = 1000 + 100L; setRecordContext(time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1", "2:X2+YY2", "3:X3+YY3"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("1:X1+YY1", "2:X2+YY2", "3:X3+YY3"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("2:X2+YY2", "3:X3+YY3"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("3:X3+YY3"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult(); // go back to the time before expiration time = 1000L - 100L - 1L; setRecordContext(time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult(); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1", "2:X2+YY2"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1", "2:X2+YY2", "3:X3+YY3"); // clear (logically) time = 2000L; for (int i = 0; i < expectedKeys.length; i++) { setRecordContext(time + i, topic2); driver.process(topic2, expectedKeys[i], "Y" + expectedKeys[i]); } processor.checkAndClearProcessResult(); // gradually expires items in w2 // w2 = { 0:Y0, 1:Y1, 2:Y2, 3:Y3 } time = 2000L + 100L; setRecordContext(time, topic1); for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "XX" + expectedKey); } processor.checkAndClearProcessResult("0:XX0+Y0", "1:XX1+Y1", "2:XX2+Y2", "3:XX3+Y3"); setRecordContext(++time, topic1); for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "XX" + expectedKey); } processor.checkAndClearProcessResult("1:XX1+Y1", "2:XX2+Y2", "3:XX3+Y3"); setRecordContext(++time, topic1); for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "XX" + expectedKey); } processor.checkAndClearProcessResult("2:XX2+Y2", "3:XX3+Y3"); setRecordContext(++time, topic1); for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "XX" + expectedKey); } processor.checkAndClearProcessResult("3:XX3+Y3"); setRecordContext(++time, topic1); for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "XX" + expectedKey); } processor.checkAndClearProcessResult(); // go back to the time before expiration time = 2000L - 100L - 1L; setRecordContext(time, topic1); for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "XX" + expectedKey); } processor.checkAndClearProcessResult(); setRecordContext(++time, topic1); for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "XX" + expectedKey); } processor.checkAndClearProcessResult("0:XX0+Y0"); setRecordContext(++time, topic1); for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "XX" + expectedKey); } processor.checkAndClearProcessResult("0:XX0+Y0", "1:XX1+Y1"); setRecordContext(++time, topic1); for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "XX" + expectedKey); } processor.checkAndClearProcessResult("0:XX0+Y0", "1:XX1+Y1", "2:XX2+Y2"); setRecordContext(++time, topic1); for (int expectedKey : expectedKeys) { driver.process(topic1, expectedKey, "XX" + expectedKey); } processor.checkAndClearProcessResult("0:XX0+Y0", "1:XX1+Y1", "2:XX2+Y2", "3:XX3+Y3"); } @Test public void testAsymetricWindowingAfter() throws Exception { long time = 1000L; KStreamBuilder builder = new KStreamBuilder(); final int[] expectedKeys = new int[]{0, 1, 2, 3}; KStream<Integer, String> stream1; KStream<Integer, String> stream2; KStream<Integer, String> joined; MockProcessorSupplier<Integer, String> processor; processor = new MockProcessorSupplier<>(); stream1 = builder.stream(intSerde, stringSerde, topic1); stream2 = builder.stream(intSerde, stringSerde, topic2); joined = stream1.join(stream2, MockValueJoiner.TOSTRING_JOINER, JoinWindows.of(0).after(100), intSerde, stringSerde, stringSerde); joined.process(processor); Collection<Set<String>> copartitionGroups = builder.copartitionGroups(); assertEquals(1, copartitionGroups.size()); assertEquals(new HashSet<>(Arrays.asList(topic1, topic2)), copartitionGroups.iterator().next()); driver = new KStreamTestDriver(builder, stateDir); for (int i = 0; i < expectedKeys.length; i++) { setRecordContext(time + i, topic1); driver.process(topic1, expectedKeys[i], "X" + expectedKeys[i]); } processor.checkAndClearProcessResult(); time = 1000L - 1L; setRecordContext(time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult(); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1", "2:X2+YY2"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1", "2:X2+YY2", "3:X3+YY3"); time = 1000 + 100L; setRecordContext(time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1", "2:X2+YY2", "3:X3+YY3"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("1:X1+YY1", "2:X2+YY2", "3:X3+YY3"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("2:X2+YY2", "3:X3+YY3"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("3:X3+YY3"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult(); } @Test public void testAsymetricWindowingBefore() throws Exception { long time = 1000L; KStreamBuilder builder = new KStreamBuilder(); final int[] expectedKeys = new int[]{0, 1, 2, 3}; KStream<Integer, String> stream1; KStream<Integer, String> stream2; KStream<Integer, String> joined; MockProcessorSupplier<Integer, String> processor; processor = new MockProcessorSupplier<>(); stream1 = builder.stream(intSerde, stringSerde, topic1); stream2 = builder.stream(intSerde, stringSerde, topic2); joined = stream1.join(stream2, MockValueJoiner.TOSTRING_JOINER, JoinWindows.of(0).before(100), intSerde, stringSerde, stringSerde); joined.process(processor); Collection<Set<String>> copartitionGroups = builder.copartitionGroups(); assertEquals(1, copartitionGroups.size()); assertEquals(new HashSet<>(Arrays.asList(topic1, topic2)), copartitionGroups.iterator().next()); driver = new KStreamTestDriver(builder, stateDir); for (int i = 0; i < expectedKeys.length; i++) { setRecordContext(time + i, topic1); driver.process(topic1, expectedKeys[i], "X" + expectedKeys[i]); } processor.checkAndClearProcessResult(); time = 1000L - 100L - 1L; setRecordContext(time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult(); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1", "2:X2+YY2"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1", "2:X2+YY2", "3:X3+YY3"); time = 1000L; setRecordContext(time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("0:X0+YY0", "1:X1+YY1", "2:X2+YY2", "3:X3+YY3"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("1:X1+YY1", "2:X2+YY2", "3:X3+YY3"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("2:X2+YY2", "3:X3+YY3"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult("3:X3+YY3"); setRecordContext(++time, topic2); for (int expectedKey : expectedKeys) { driver.process(topic2, expectedKey, "YY" + expectedKey); } processor.checkAndClearProcessResult(); } private void setRecordContext(final long time, final String topic) { ((MockProcessorContext) driver.context()).setRecordContext(new ProcessorRecordContext(time, 0, 0, topic)); } }