| /* |
| * 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.basic.operators; |
| |
| import org.junit.Test; |
| import org.apache.wayang.core.function.TransformationDescriptor; |
| import org.apache.wayang.core.types.DataSetType; |
| import org.apache.wayang.core.types.DataUnitType; |
| |
| import java.util.stream.StreamSupport; |
| |
| /** |
| * Tests for the {@link MaterializedGroupByOperator}. |
| */ |
| public class MaterializedGroupByOperatorTest { |
| |
| @Test |
| public void testConnectingToMap() { |
| 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) |
| ); |
| materializedGroupByOperator.connectTo(0, mapOperator, 0); |
| } |
| |
| } |