| /* |
| * 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.test.api.java.operators.lambdas; |
| |
| import org.apache.flink.api.java.DataSet; |
| import org.apache.flink.api.java.ExecutionEnvironment; |
| import org.apache.flink.test.util.JavaProgramTestBase; |
| |
| /** |
| * IT cases for lambda map functions. |
| */ |
| public class MapITCase extends JavaProgramTestBase { |
| |
| private static class Trade { |
| |
| public String v; |
| |
| public Trade(String v) { |
| this.v = v; |
| } |
| |
| @Override |
| public String toString() { |
| return v; |
| } |
| } |
| |
| private static final String EXPECTED_RESULT = "22\n" + |
| "22\n" + |
| "23\n" + |
| "24\n"; |
| |
| private String resultPath; |
| |
| @Override |
| protected void preSubmit() throws Exception { |
| resultPath = getTempDirPath("result"); |
| } |
| |
| @Override |
| protected void testProgram() throws Exception { |
| final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment(); |
| |
| DataSet<Integer> stringDs = env.fromElements(11, 12, 13, 14); |
| DataSet<String> mappedDs = stringDs |
| .map(Object::toString) |
| .map (s -> s.replace("1", "2")) |
| .map(Trade::new) |
| .map(Trade::toString); |
| mappedDs.writeAsText(resultPath); |
| env.execute(); |
| } |
| |
| @Override |
| protected void postSubmit() throws Exception { |
| compareResultsByLinesInMemory(EXPECTED_RESULT, resultPath); |
| } |
| } |