| /* |
| * 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.flink.operators; |
| |
| import org.apache.wayang.core.function.FlatMapDescriptor; |
| import org.apache.wayang.core.platform.ChannelInstance; |
| import org.apache.wayang.core.types.DataSetType; |
| import org.apache.wayang.flink.channels.DataSetChannel; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| |
| /** |
| * Test suite for {@link FlinkFlatMapOperator}. |
| */ |
| public class FlinkFlatMapOperatorTest extends FlinkOperatorTestBase{ |
| @Test |
| public void testExecution() throws Exception { |
| // Prepare test data. |
| DataSetChannel.Instance input = this.createDataSetChannelInstance(Arrays.asList("one phrase", "two sentences", "three lines")); |
| DataSetChannel.Instance output = this.createDataSetChannelInstance(); |
| |
| FlinkFlatMapOperator<String, String> flatMapOperator = new FlinkFlatMapOperator<>( |
| DataSetType.createDefaultUnchecked(String.class), |
| DataSetType.createDefaultUnchecked(String.class), |
| new FlatMapDescriptor<>(phrase -> Arrays.asList(phrase.split(" ")), String.class, String.class) |
| ); |
| |
| // Set up the ChannelInstances. |
| ChannelInstance[] inputs = new ChannelInstance[]{input}; |
| ChannelInstance[] outputs = new ChannelInstance[]{output}; |
| |
| // Execute. |
| this.evaluate(flatMapOperator, inputs, outputs); |
| |
| // Verify the outcome. |
| final List<String> result = output.<String>provideDataSet().collect(); |
| Assert.assertEquals(6, result.size()); |
| Assert.assertEquals(Arrays.asList("one", "phrase", "two", "sentences", "three", "lines"), result); |
| |
| } |
| } |