| /* |
| * 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.wayang.tests; |
| |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.apache.wayang.basic.WayangBasics; |
| import org.apache.wayang.basic.data.Record; |
| import org.apache.wayang.basic.data.Tuple2; |
| import org.apache.wayang.basic.operators.CollectionSource; |
| import org.apache.wayang.basic.operators.LocalCallbackSink; |
| import org.apache.wayang.basic.operators.MapOperator; |
| import org.apache.wayang.basic.operators.MaterializedGroupByOperator; |
| import org.apache.wayang.core.api.Configuration; |
| import org.apache.wayang.core.api.WayangContext; |
| import org.apache.wayang.core.api.exception.WayangException; |
| import org.apache.wayang.core.function.TransformationDescriptor; |
| import org.apache.wayang.core.plan.wayangplan.Operator; |
| import org.apache.wayang.core.plan.wayangplan.WayangPlan; |
| import org.apache.wayang.core.types.DataSetType; |
| import org.apache.wayang.core.types.DataUnitType; |
| import org.apache.wayang.core.util.WayangArrays; |
| import org.apache.wayang.core.util.WayangCollections; |
| import org.apache.wayang.flink.Flink; |
| import org.apache.wayang.java.Java; |
| import org.apache.wayang.spark.Spark; |
| import org.apache.wayang.sqlite3.Sqlite3; |
| import org.apache.wayang.tests.platform.MyMadeUpPlatform; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.URISyntaxException; |
| import java.nio.file.Files; |
| import java.nio.file.Paths; |
| import java.sql.SQLException; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| import java.util.stream.StreamSupport; |
| |
| /** |
| * Test the Java integration with Wayang. |
| */ |
| public class FullIntegrationIT { |
| |
| private Configuration configuration; |
| |
| @Before |
| public void setUp() throws SQLException, IOException { |
| this.configuration = new Configuration(); |
| File sqlite3dbFile = File.createTempFile("wayang-sqlite3", "db"); |
| sqlite3dbFile.deleteOnExit(); |
| this.configuration.setProperty( |
| "wayang.sqlite3.jdbc.url", |
| "jdbc:sqlite:" + sqlite3dbFile.getAbsolutePath() |
| ); |
| WayangPlans.prepareSqlite3Scenarios(this.configuration); |
| } |
| |
| @Test |
| public void testReadAndWrite() throws URISyntaxException, IOException { |
| // Build a Wayang plan. |
| List<String> collector = new LinkedList<>(); |
| WayangPlan wayangPlan = WayangPlans.readWrite(WayangPlans.FILE_SOME_LINES_TXT, collector); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()) |
| .with(Flink.basicPlugin()); |
| |
| // Have Wayang execute the plan. |
| wayangContext.execute(wayangPlan); |
| |
| // Verify the plan result. |
| final List<String> lines = Files.lines(Paths.get(WayangPlans.FILE_SOME_LINES_TXT)).collect(Collectors.toList()); |
| Assert.assertEquals(lines, collector); |
| } |
| |
| @Test |
| public void testReadAndWriteCrossPlatform() throws URISyntaxException, IOException { |
| // Build a Wayang plan. |
| List<String> collector = new LinkedList<>(); |
| WayangPlan wayangPlan = WayangPlans.readWrite(WayangPlans.FILE_SOME_LINES_TXT, collector); |
| final Operator sink = wayangPlan.getSinks().stream().findFirst().get(); |
| sink.addTargetPlatform(Spark.platform()); |
| final Operator source = sink.getEffectiveOccupant(0).getOwner(); |
| source.addTargetPlatform(Java.platform()); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| // Have Wayang execute the plan. |
| wayangContext.execute(wayangPlan); |
| |
| // Verify the plan result. |
| final List<String> lines = Files.lines(Paths.get(WayangPlans.FILE_SOME_LINES_TXT)).collect(Collectors.toList()); |
| Assert.assertEquals(lines, collector); |
| } |
| |
| @Test |
| public void testReadAndTransformAndWrite() throws URISyntaxException { |
| // Build a Wayang plan. |
| final WayangPlan wayangPlan = WayangPlans.readTransformWrite(WayangPlans.FILE_SOME_LINES_TXT); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| // Have Wayang execute the plan. |
| wayangContext.execute(wayangPlan); |
| } |
| |
| @Test(expected = WayangException.class) |
| public void testReadAndTransformAndWriteWithIllegalConfiguration1() throws URISyntaxException { |
| // Build a Wayang plan. |
| final WayangPlan wayangPlan = WayangPlans.readTransformWrite(WayangPlans.FILE_SOME_LINES_TXT); |
| // ILLEGAL: This platform is not registered, so this operator will find no implementation. |
| wayangPlan.getSinks().forEach(sink -> sink.addTargetPlatform(MyMadeUpPlatform.getInstance())); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| // Have Wayang execute the plan. |
| wayangContext.execute(wayangPlan); |
| |
| } |
| |
| @Test |
| public void testMultiSourceAndMultiSink() throws URISyntaxException { |
| // Define some input data. |
| final List<String> collection1 = Arrays.<String>asList("This is source 1.", "This is source 1, too."); |
| final List<String> collection2 = Arrays.<String>asList("This is source 2.", "This is source 2, too."); |
| List<String> collector1 = new LinkedList<>(); |
| List<String> collector2 = new LinkedList<>(); |
| final WayangPlan wayangPlan = WayangPlans.multiSourceMultiSink(collection1, collection2, collector1, collector2); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| // Have Wayang execute the plan. |
| wayangContext.execute(wayangPlan); |
| |
| // Check the results in both sinks. |
| List<String> expectedOutcome1 = Stream.concat(collection1.stream(), collection2.stream()) |
| .map(String::toUpperCase) |
| .collect(Collectors.toList()); |
| List<String> expectedOutcome2 = Stream.concat(collection1.stream(), collection2.stream()) |
| .collect(Collectors.toList()); |
| Collections.sort(expectedOutcome1); |
| Collections.sort(expectedOutcome2); |
| Collections.sort(collector1); |
| Collections.sort(collector2); |
| Assert.assertEquals(expectedOutcome1, collector1); |
| Assert.assertEquals(expectedOutcome2, collector2); |
| } |
| |
| @Test |
| public void testMultiSourceAndHoleAndMultiSink() throws URISyntaxException { |
| // Define some input data. |
| final List<String> collection1 = Arrays.<String>asList("This is source 1.", "This is source 1, too."); |
| final List<String> collection2 = Arrays.<String>asList("This is source 2.", "This is source 2, too."); |
| List<String> collector1 = new LinkedList<>(); |
| List<String> collector2 = new LinkedList<>(); |
| final WayangPlan wayangPlan = WayangPlans.multiSourceHoleMultiSink(collection1, collection2, collector1, collector2); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| // Have Wayang execute the plan. |
| wayangContext.execute(wayangPlan); |
| |
| // Check the results in both sinks. |
| List<String> expectedOutcome = Stream.concat(collection1.stream(), collection2.stream()) |
| .flatMap(string -> Arrays.asList(string.toLowerCase(), string.toUpperCase()).stream()) |
| .collect(Collectors.toList()); |
| Collections.sort(expectedOutcome); |
| Collections.sort(collector1); |
| Collections.sort(collector2); |
| Assert.assertEquals(expectedOutcome, collector1); |
| Assert.assertEquals(expectedOutcome, collector2); |
| } |
| |
| @Test |
| public void testGlobalMaterializedGroup() throws URISyntaxException { |
| // Build the WayangPlan. |
| List<Iterable<Integer>> collector = new LinkedList<>(); |
| WayangPlan wayangPlan = WayangPlans.globalMaterializedGroup(collector, 1, 2, 3); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| wayangContext.execute(wayangPlan); |
| |
| Assert.assertEquals(1, collector.size()); |
| Assert.assertEquals(WayangCollections.asSet(1, 2, 3), WayangCollections.asCollection(collector.get(0), HashSet::new)); |
| } |
| |
| @Test |
| public void testIntersect() throws URISyntaxException { |
| // Build the WayangPlan. |
| List<Integer> collector = new LinkedList<>(); |
| WayangPlan wayangPlan = WayangPlans.intersectSquares(collector, 0, 1, 2, 3, 3, -1, -1, -2, -3, -3, -4); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| wayangContext.execute(wayangPlan); |
| |
| Assert.assertEquals(WayangCollections.asSet(1, 4, 9), WayangCollections.asSet(collector)); |
| } |
| |
| @Test |
| public void testRepeat() { |
| // Build the WayangPlan. |
| List<Integer> collector = new LinkedList<>(); |
| WayangPlan wayangPlan = WayangPlans.repeat(collector, 5, 0, 10, 20, 30, 45); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| wayangContext.execute(wayangPlan); |
| |
| Assert.assertEquals(5, collector.size()); |
| Assert.assertEquals(WayangCollections.asSet(5, 15, 25, 35, 50), WayangCollections.asSet(collector)); |
| } |
| |
| @Test |
| public void testPageRankWithGraphBasic() { |
| // Build the WayangPlan. |
| List<Tuple2<Long, Long>> edges = Arrays.asList( |
| new Tuple2<>(0L, 1L), |
| new Tuple2<>(0L, 2L), |
| new Tuple2<>(0L, 3L), |
| new Tuple2<>(1L, 2L), |
| new Tuple2<>(1L, 3L), |
| new Tuple2<>(2L, 3L), |
| new Tuple2<>(3L, 0L) |
| ); |
| List<Tuple2<Long, Float>> pageRanks = new LinkedList<>(); |
| WayangPlan wayangPlan = WayangPlans.pageRank(edges, pageRanks); |
| |
| // Execute the plan with a certain backend. |
| WayangContext wayangContext = new WayangContext() |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()) |
| .with(WayangBasics.graphPlugin()); |
| wayangContext.execute(wayangPlan); |
| |
| // Check the results. |
| pageRanks.sort((r1, r2) -> Float.compare(r2.getField1(), r1.getField1())); |
| final List<Long> vertexOrder = pageRanks.stream().map(Tuple2::getField0).collect(Collectors.toList()); |
| Assert.assertEquals( |
| Arrays.asList(3L, 0L, 2L, 1L), |
| vertexOrder |
| ); |
| } |
| |
| @Test |
| public void testMapPartitions() throws URISyntaxException { |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext().with(Java.basicPlugin()).with(Spark.basicPlugin()); |
| |
| // Execute the Wayang plan. |
| final Collection<Tuple2<String, Integer>> result = WayangPlans.mapPartitions(wayangContext, 0, 1, 1, 3, 3, 4, 4, 5, 5, 6); |
| |
| Assert.assertEquals( |
| WayangCollections.asSet(new Tuple2<>("even", 4), new Tuple2<>("odd", 6)), |
| WayangCollections.asSet(result) |
| ); |
| } |
| |
| @Test |
| public void testZipWithId() throws URISyntaxException { |
| // Build the WayangPlan. |
| List<Long> collector = new LinkedList<>(); |
| WayangPlan wayangPlan = WayangPlans.zipWithId(collector, 0, 10, 20, 30, 30); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| wayangContext.execute(wayangPlan); |
| |
| Assert.assertEquals(1, collector.size()); |
| Assert.assertEquals(Long.valueOf(5L), collector.get(0)); |
| } |
| |
| @Test |
| public void testDiverseScenario1() throws URISyntaxException { |
| // Build the WayangPlan. |
| WayangPlan wayangPlan = WayangPlans.diverseScenario1(WayangPlans.FILE_SOME_LINES_TXT); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| wayangContext.execute(wayangPlan); |
| } |
| |
| @Test |
| public void testDiverseScenario2() throws URISyntaxException { |
| // Build the WayangPlan. |
| WayangPlan wayangPlan = WayangPlans.diverseScenario2(WayangPlans.FILE_SOME_LINES_TXT, WayangPlans.FILE_OTHER_LINES_TXT); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| wayangContext.execute(wayangPlan); |
| } |
| |
| @Test |
| public void testDiverseScenario3() throws URISyntaxException { |
| // Build the WayangPlan. |
| WayangPlan wayangPlan = WayangPlans.diverseScenario2(WayangPlans.FILE_SOME_LINES_TXT, WayangPlans.FILE_OTHER_LINES_TXT); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| wayangContext.execute(wayangPlan); |
| } |
| |
| @Test |
| public void testDiverseScenario4() throws URISyntaxException { |
| // Build the WayangPlan. |
| WayangPlan wayangPlan = WayangPlans.diverseScenario4(WayangPlans.FILE_SOME_LINES_TXT, WayangPlans.FILE_OTHER_LINES_TXT); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| wayangContext.execute(wayangPlan); |
| } |
| |
| @Test |
| public void testSimpleSingleStageLoop() throws URISyntaxException { |
| // Build the WayangPlan. |
| final Set<Integer> collector = new HashSet<>(); |
| WayangPlan wayangPlan = WayangPlans.simpleLoop(3, collector, 0, 1, 2); |
| |
| wayangPlan.collectTopLevelOperatorByName("source").addTargetPlatform(Spark.platform()); |
| wayangPlan.collectTopLevelOperatorByName("convergenceSource").addTargetPlatform(Spark.platform()); |
| wayangPlan.collectTopLevelOperatorByName("loop").addTargetPlatform(Java.platform()); |
| wayangPlan.collectTopLevelOperatorByName("step").addTargetPlatform(Java.platform()); |
| wayangPlan.collectTopLevelOperatorByName("counter").addTargetPlatform(Java.platform()); |
| wayangPlan.collectTopLevelOperatorByName("sink").addTargetPlatform(Spark.platform()); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| wayangContext.execute(wayangPlan); |
| |
| final HashSet<Integer> expected = new HashSet<>(WayangArrays.asList(WayangArrays.range(0, 24))); |
| Assert.assertEquals(expected, collector); |
| } |
| |
| @Test |
| public void testSimpleMultiStageLoop() throws URISyntaxException { |
| // Build the WayangPlan. |
| final List<Integer> collector = new LinkedList<>(); |
| WayangPlan wayangPlan = WayangPlans.simpleLoop(3, collector, 0, 1, 2); |
| |
| wayangPlan.collectTopLevelOperatorByName("source").addTargetPlatform(Spark.platform()); |
| wayangPlan.collectTopLevelOperatorByName("convergenceSource").addTargetPlatform(Spark.platform()); |
| wayangPlan.collectTopLevelOperatorByName("loop").addTargetPlatform(Java.platform()); |
| wayangPlan.collectTopLevelOperatorByName("step").addTargetPlatform(Spark.platform()); |
| wayangPlan.collectTopLevelOperatorByName("counter").addTargetPlatform(Java.platform()); |
| wayangPlan.collectTopLevelOperatorByName("sink").addTargetPlatform(Spark.platform()); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| wayangContext.execute(wayangPlan); |
| |
| final HashSet<Integer> expected = new HashSet<>(WayangArrays.asList(WayangArrays.range(0, 24))); |
| Assert.assertEquals(expected, WayangCollections.asSet(collector)); |
| } |
| |
| @Test |
| public void testSimpleSample() throws URISyntaxException { |
| // Build the WayangPlan. |
| final List<Integer> collector = new LinkedList<>(); |
| WayangPlan wayangPlan = WayangPlans.simpleSample(3, collector, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9); |
| |
| // Instantiate Wayang and activate the Java backend. |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()); |
| |
| wayangContext.execute(wayangPlan); |
| System.out.println(collector); |
| } |
| |
| @Test |
| public void testCurrentIterationNumber() { |
| WayangContext wayangContext = new WayangContext().with(Java.basicPlugin()).with(Spark.basicPlugin()); |
| final Collection<Integer> result = WayangPlans.loopWithIterationNumber(wayangContext, 15, 5, -1, 1, 5); |
| int expectedOffset = 10; |
| Assert.assertEquals( |
| WayangCollections.asSet(-1 + expectedOffset, 1 + expectedOffset, 5 + expectedOffset), |
| WayangCollections.asSet(result) |
| ); |
| } |
| |
| @Test |
| public void testCurrentIterationNumberWithTooFewExpectedIterations() { |
| WayangContext wayangContext = new WayangContext().with(Java.basicPlugin()).with(Spark.basicPlugin()); |
| final Collection<Integer> result = WayangPlans.loopWithIterationNumber(wayangContext, 15, 2, -1, 1, 5); |
| int expectedOffset = 10; |
| Assert.assertEquals( |
| WayangCollections.asSet(-1 + expectedOffset, 1 + expectedOffset, 5 + expectedOffset), |
| WayangCollections.asSet(result) |
| ); |
| } |
| |
| @Test |
| public void testGroupByOperator() { |
| final CollectionSource<String> source = new CollectionSource<>( |
| Arrays.asList("a", "b", "a", "ab", "aa", "bb"), |
| String.class |
| ); |
| final MaterializedGroupByOperator<String, Integer> materializedGroupByOperator = |
| new MaterializedGroupByOperator<>(String::length, String.class, Integer.class); |
| final MapOperator<Iterable<String>, Integer> mapOperator = new MapOperator<>( |
| new TransformationDescriptor<>( |
| strings -> (int) StreamSupport.stream(strings.spliterator(), false).count(), |
| DataUnitType.createBasicUnchecked(Iterable.class), |
| DataUnitType.createBasic(Integer.class) |
| ), |
| DataSetType.createGrouped(String.class), |
| DataSetType.createDefault(Integer.class) |
| ); |
| final Collection<Integer> collector = new LinkedList<>(); |
| final LocalCallbackSink<Integer> sink = LocalCallbackSink.createCollectingSink(collector, Integer.class); |
| |
| source.connectTo(0, materializedGroupByOperator, 0); |
| materializedGroupByOperator.connectTo(0, mapOperator, 0); |
| mapOperator.connectTo(0, sink, 0); |
| |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Spark.basicPlugin()) |
| .with(Java.basicPlugin()); |
| |
| wayangContext.execute(new WayangPlan(sink)); |
| System.out.println(collector); |
| } |
| |
| @Test |
| public void testSqlite3Scenario1() { |
| Collection<Record> collector = new ArrayList<>(); |
| final WayangPlan wayangPlan = WayangPlans.sqlite3Scenario1(collector); |
| |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()) |
| .with(Sqlite3.plugin()); |
| |
| wayangContext.execute("SQLite3 scenario 1", wayangPlan); |
| |
| Assert.assertEquals(WayangPlans.getSqlite3Customers(), collector); |
| } |
| |
| @Test |
| public void testSqlite3Scenario2() { |
| Collection<Record> collector = new ArrayList<>(); |
| final WayangPlan wayangPlan = WayangPlans.sqlite3Scenario2(collector); |
| |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()) |
| .with(Sqlite3.plugin()); |
| |
| wayangContext.execute("SQLite3 scenario 2", wayangPlan); |
| |
| final List<Record> expected = WayangPlans.getSqlite3Customers().stream() |
| .filter(r -> (Integer) r.getField(1) >= 18) |
| .collect(Collectors.toList()); |
| Assert.assertEquals(expected, collector); |
| } |
| |
| @Test |
| public void testSqlite3Scenario3() { |
| Collection<Record> collector = new ArrayList<>(); |
| final WayangPlan wayangPlan = WayangPlans.sqlite3Scenario3(collector); |
| |
| WayangContext wayangContext = new WayangContext(configuration) |
| .with(Java.basicPlugin()) |
| .with(Spark.basicPlugin()) |
| .with(Sqlite3.plugin()); |
| |
| wayangContext.execute("SQLite3 scenario 3", wayangPlan); |
| |
| final List<Record> expected = WayangPlans.getSqlite3Customers().stream() |
| .filter(r -> (Integer) r.getField(1) >= 18) |
| .map(r -> new Record(new Object[]{r.getField(0)})) |
| .collect(Collectors.toList()); |
| Assert.assertEquals(expected, collector); |
| } |
| } |
