afedulov commented on code in PR #20757: URL: https://github.com/apache/flink/pull/20757#discussion_r975590103
########## flink-core/src/test/java/org/apache/flink/api/connector/source/lib/DataGeneratorSourceTest.java: ########## @@ -0,0 +1,250 @@ +/* + * 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.flink.api.connector.source.lib; + +import org.apache.flink.api.common.eventtime.Watermark; +import org.apache.flink.api.common.typeinfo.Types; +import org.apache.flink.api.connector.source.ReaderOutput; +import org.apache.flink.api.connector.source.SourceEvent; +import org.apache.flink.api.connector.source.SourceOutput; +import org.apache.flink.api.connector.source.SourceReader; +import org.apache.flink.api.connector.source.SourceReaderContext; +import org.apache.flink.api.connector.source.SplitEnumerator; +import org.apache.flink.api.connector.source.datagen.DataGeneratorSource; +import org.apache.flink.api.connector.source.datagen.GeneratorFunction; +import org.apache.flink.api.connector.source.mocks.MockSplitEnumeratorContext; +import org.apache.flink.configuration.Configuration; +import org.apache.flink.core.io.InputStatus; +import org.apache.flink.metrics.groups.SourceReaderMetricGroup; +import org.apache.flink.metrics.groups.UnregisteredMetricsGroup; +import org.apache.flink.mock.Whitebox; +import org.apache.flink.util.SimpleUserCodeClassLoader; +import org.apache.flink.util.UserCodeClassLoader; + +import org.junit.jupiter.api.Assertions; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.api.Test; + +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collection; +import java.util.List; +import java.util.Queue; + +import static org.assertj.core.api.Assertions.assertThat; + +/** Tests for the {@link DataGeneratorSource}. */ +public class DataGeneratorSourceTest { + + @Test + @DisplayName("Correctly restores SplitEnumerator from a snapshot.") + public void testRestoreEnumerator() throws Exception { + final GeneratorFunction<Long, Long> generatorFunctionStateless = index -> index; + final DataGeneratorSource<Long> dataGeneratorSource = + new DataGeneratorSource<>(generatorFunctionStateless, 100, Types.LONG); + + final int parallelism = 2; + final MockSplitEnumeratorContext<NumberSequenceSource.NumberSequenceSplit> context = + new MockSplitEnumeratorContext<>(parallelism); + + SplitEnumerator< + NumberSequenceSource.NumberSequenceSplit, + Collection<NumberSequenceSource.NumberSequenceSplit>> + enumerator = dataGeneratorSource.createEnumerator(context); + + // start() is not strictly necessary in the current implementation, but should logically be + // executed in this order (protect against any breaking changes in the start() method). + enumerator.start(); + + Collection<NumberSequenceSource.NumberSequenceSplit> enumeratorState = + enumerator.snapshotState(0); + + @SuppressWarnings("unchecked") + final Queue<NumberSequenceSource.NumberSequenceSplit> splits = + (Queue<NumberSequenceSource.NumberSequenceSplit>) + Whitebox.getInternalState(enumerator, "remainingSplits"); + + assertThat(splits).hasSize(parallelism); Review Comment: Good idea, I modified the test accordingly: https://github.com/apache/flink/pull/20757/commits/e8a11fe0afe73ae22d9ef7911b0302846cfbfd61 -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
