pvary commented on code in PR #8553: URL: https://github.com/apache/iceberg/pull/8553#discussion_r1396766098
########## flink/v1.17/flink/src/test/java/org/apache/iceberg/flink/source/reader/TestColumnStatsWatermarkExtractor.java: ########## @@ -0,0 +1,215 @@ +/* + * 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.iceberg.flink.source.reader; + +import static org.apache.iceberg.types.Types.NestedField.required; + +import java.io.IOException; +import java.time.LocalDateTime; +import java.time.OffsetDateTime; +import java.time.ZoneOffset; +import java.util.Arrays; +import java.util.Collection; +import java.util.List; +import java.util.concurrent.TimeUnit; +import java.util.stream.Collectors; +import org.apache.iceberg.BaseCombinedScanTask; +import org.apache.iceberg.DataFile; +import org.apache.iceberg.FileFormat; +import org.apache.iceberg.FileScanTask; +import org.apache.iceberg.MockFileScanTask; +import org.apache.iceberg.Schema; +import org.apache.iceberg.data.GenericAppenderHelper; +import org.apache.iceberg.data.RandomGenericData; +import org.apache.iceberg.data.Record; +import org.apache.iceberg.flink.HadoopTableResource; +import org.apache.iceberg.flink.TestFixtures; +import org.apache.iceberg.flink.source.split.IcebergSourceSplit; +import org.apache.iceberg.types.Types; +import org.assertj.core.api.Assertions; +import org.junit.Assert; +import org.junit.Before; +import org.junit.ClassRule; +import org.junit.Rule; +import org.junit.Test; +import org.junit.rules.TemporaryFolder; + +public class TestColumnStatsWatermarkExtractor { + public static final Schema SCHEMA = + new Schema( + required(1, "ts", Types.TimestampType.withoutZone()), + required(2, "tstz", Types.TimestampType.withZone()), + required(3, "l", Types.LongType.get()), + required(4, "s", Types.StringType.get())); + + @ClassRule public static final TemporaryFolder TEMPORARY_FOLDER = new TemporaryFolder(); + + @Rule + public final HadoopTableResource sourceTableResource = + new HadoopTableResource(TEMPORARY_FOLDER, TestFixtures.DATABASE, TestFixtures.TABLE, SCHEMA); + + private GenericAppenderHelper dataAppender; + private long minTs = Long.MAX_VALUE; + private long minTsTz = Long.MAX_VALUE; + private long minL = Long.MAX_VALUE; + + @Before + public void initTable() throws IOException { + dataAppender = + new GenericAppenderHelper( + sourceTableResource.table(), FileFormat.PARQUET, TEMPORARY_FOLDER); + + List<Record> batch = RandomGenericData.generate(SCHEMA, 3, 2L); + dataAppender.appendToTable(batch); + + for (Record r : batch) { + LocalDateTime localDateTime = (LocalDateTime) r.get(0); + minTs = Math.min(minTs, localDateTime.toInstant(ZoneOffset.UTC).toEpochMilli()); + + OffsetDateTime offsetDateTime = (OffsetDateTime) r.get(1); + minTsTz = Math.min(minTsTz, offsetDateTime.toInstant().toEpochMilli()); + + minL = Math.min(minL, (Long) r.get(2)); + } + } + + @Test + public void testTimestamp() { + DataFile dataFile = + sourceTableResource + .table() + .currentSnapshot() + .addedDataFiles(sourceTableResource.table().io()) + .iterator() + .next(); + ColumnStatsWatermarkExtractor tsExtractor = + new ColumnStatsWatermarkExtractor(SCHEMA, "ts", null); + + Assert.assertEquals( + minTs, + tsExtractor.extractWatermark( + IcebergSourceSplit.fromCombinedScanTask(new DummyTask(dataFile)))); + } + + @Test + public void testTimestampWithTz() { + DataFile dataFile = + sourceTableResource + .table() + .currentSnapshot() + .addedDataFiles(sourceTableResource.table().io()) + .iterator() + .next(); + ColumnStatsWatermarkExtractor tsTzExtractor = + new ColumnStatsWatermarkExtractor(SCHEMA, "tstz", null); + + Assert.assertEquals( + minTsTz, + tsTzExtractor.extractWatermark( + IcebergSourceSplit.fromCombinedScanTask(new DummyTask(dataFile)))); + } + + @Test + public void testLong() { + DataFile dataFile = + sourceTableResource + .table() + .currentSnapshot() + .addedDataFiles(sourceTableResource.table().io()) + .iterator() + .next(); + ColumnStatsWatermarkExtractor longExtractorMilliSeconds = + new ColumnStatsWatermarkExtractor(SCHEMA, "l", TimeUnit.MILLISECONDS); + ColumnStatsWatermarkExtractor longExtractorMicroSeconds = + new ColumnStatsWatermarkExtractor(SCHEMA, "l", TimeUnit.MICROSECONDS); + + Assert.assertEquals( + minL, + longExtractorMilliSeconds.extractWatermark( + IcebergSourceSplit.fromCombinedScanTask(new DummyTask(dataFile)))); + Assert.assertEquals( + minL / 1000L, + longExtractorMicroSeconds.extractWatermark( + IcebergSourceSplit.fromCombinedScanTask(new DummyTask(dataFile)))); + } + + @Test + public void testMultipleFiles() throws IOException { Review Comment: Ryan always presses that we test every feature in its own method. -- This is an automated message from the Apache Git Service. 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