nsivabalan commented on code in PR #10858: URL: https://github.com/apache/hudi/pull/10858#discussion_r1541495937
########## hudi-utilities/src/test/java/org/apache/hudi/utilities/streamer/TestStreamSyncUnitTests.java: ########## @@ -0,0 +1,188 @@ +/* + * 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. + */ + +/* + * 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.hudi.utilities.streamer; + +import org.apache.hudi.DataSourceWriteOptions; +import org.apache.hudi.client.common.HoodieSparkEngineContext; +import org.apache.hudi.common.config.TypedProperties; +import org.apache.hudi.common.table.HoodieTableMetaClient; +import org.apache.hudi.common.util.Option; +import org.apache.hudi.config.HoodieErrorTableConfig; +import org.apache.hudi.utilities.schema.SchemaProvider; +import org.apache.hudi.utilities.sources.InputBatch; +import org.apache.hudi.utilities.transform.Transformer; + +import org.apache.avro.Schema; +import org.apache.avro.generic.GenericRecord; +import org.apache.hadoop.conf.Configuration; +import org.apache.hadoop.fs.FileSystem; +import org.apache.spark.api.java.JavaRDD; +import org.apache.spark.sql.Dataset; +import org.apache.spark.sql.Row; +import org.apache.spark.sql.SparkSession; +import org.junit.jupiter.params.ParameterizedTest; +import org.junit.jupiter.params.provider.Arguments; +import org.junit.jupiter.params.provider.MethodSource; + +import java.util.stream.Stream; + +import static org.apache.hudi.config.HoodieErrorTableConfig.ERROR_ENABLE_VALIDATE_TARGET_SCHEMA; +import static org.mockito.ArgumentMatchers.any; +import static org.mockito.ArgumentMatchers.anyLong; +import static org.mockito.Mockito.doReturn; +import static org.mockito.Mockito.mock; +import static org.mockito.Mockito.never; +import static org.mockito.Mockito.spy; +import static org.mockito.Mockito.times; +import static org.mockito.Mockito.verify; +import static org.mockito.Mockito.when; + +public class TestStreamSyncUnitTests { + + @ParameterizedTest + @MethodSource("testCasesFetchNextBatchFromSource") + void testFetchNextBatchFromSource(Boolean useRowWriter, Boolean hasTransformer, Boolean hasSchemaProvider, + Boolean isNullTargetSchema, Boolean hasErrorTable, Boolean shouldTryWriteToErrorTable) { + //basic deltastreamer inputs + HoodieSparkEngineContext hoodieSparkEngineContext = mock(HoodieSparkEngineContext.class); + FileSystem fs = mock(FileSystem.class); + SparkSession sparkSession = mock(SparkSession.class); + Configuration configuration = mock(Configuration.class); + HoodieStreamer.Config cfg = new HoodieStreamer.Config(); + cfg.targetTableName = "testTableName"; + cfg.targetBasePath = "/fake/table/name"; + cfg.tableType = "MERGE_ON_READ"; + + //Source format adapter + SourceFormatAdapter sourceFormatAdapter = mock(SourceFormatAdapter.class); + SchemaProvider inputBatchSchemaProvider = getSchemaProvider("InputBatch", false); + Option<Dataset<Row>> fakeDataFrame = Option.of(mock(Dataset.class)); + InputBatch<Dataset<Row>> fakeRowInputBatch = new InputBatch<>(fakeDataFrame, "chkpt", inputBatchSchemaProvider); + when(sourceFormatAdapter.fetchNewDataInRowFormat(any(), anyLong())).thenReturn(fakeRowInputBatch); + //batch is empty because we don't want getBatch().map() to do anything because it calls static method we can't mock + InputBatch<JavaRDD<GenericRecord>> fakeAvroInputBatch = new InputBatch<>(Option.empty(), "chkpt", inputBatchSchemaProvider); + when(sourceFormatAdapter.fetchNewDataInAvroFormat(any(),anyLong())).thenReturn(fakeAvroInputBatch); + + //transformer + //return empty because we don't want .map() to do anything because it calls static method we can't mock + when(sourceFormatAdapter.processErrorEvents(any(), any())).thenReturn(Option.empty()); + Option<Transformer> transformerOption = Option.empty(); + if (hasTransformer) { + transformerOption = Option.of(mock(Transformer.class)); + } + + //user provided schema provider + SchemaProvider schemaProvider = null; + if (hasSchemaProvider) { + schemaProvider = getSchemaProvider("UserProvided", isNullTargetSchema); + } + + //error table + TypedProperties props = new TypedProperties(); + props.put(DataSourceWriteOptions.RECONCILE_SCHEMA().key(), false); + Option<BaseErrorTableWriter> errorTableWriterOption = Option.empty(); + if (hasErrorTable) { + errorTableWriterOption = Option.of(mock(BaseErrorTableWriter.class)); + props.put(ERROR_ENABLE_VALIDATE_TARGET_SCHEMA.key(), true); + } + TypedProperties propsSpy = spy(props); + + + //Actually create the deltastreamer + StreamSync streamSync = new StreamSync(cfg, sparkSession, propsSpy, hoodieSparkEngineContext, + fs, configuration, client -> true, schemaProvider, errorTableWriterOption, sourceFormatAdapter, transformerOption, useRowWriter, false); + StreamSync spy = spy(streamSync); + SchemaProvider deducedSchemaProvider; + deducedSchemaProvider = getSchemaProvider("deduced", false); + doReturn(deducedSchemaProvider).when(spy).getDeducedSchemaProvider(any(), any(), any()); + + //run the method we are unit testing: + spy.fetchNextBatchFromSource(Option.empty(), mock(HoodieTableMetaClient.class)); + + //make sure getDeducedSchemaProvider is always called once + verify(spy, times(1)).getDeducedSchemaProvider(any(), any(), any()); + + //make sure we use error table when we should + verify(propsSpy, shouldTryWriteToErrorTable ? times(1) : never()) + .getBoolean(HoodieErrorTableConfig.ERROR_ENABLE_VALIDATE_TARGET_SCHEMA.key(), + HoodieErrorTableConfig.ERROR_ENABLE_VALIDATE_TARGET_SCHEMA.defaultValue()); Review Comment: can we assert the schema returned from fetchNextBatchFromSource as well. thats the key here right. that we evolve the schema correctly under any of these branching -- This is an automated message from the Apache Git Service. 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