| /* |
| * 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.pig.test; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Random; |
| |
| import org.apache.pig.backend.executionengine.ExecException; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.POStatus; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.Result; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.POProject; |
| import org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach; |
| import org.apache.pig.data.DataBag; |
| import org.apache.pig.data.DataType; |
| import org.apache.pig.data.DefaultTuple; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.test.utils.GenPhyOp; |
| import org.apache.pig.test.utils.GenRandomData; |
| import org.apache.pig.test.utils.TestHelper; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| /** |
| * Tests foreach db generate $0 |
| * Constructs a bag that projects the input |
| * bag onto the the column $0 and checks if |
| * the tuples generated by foreach are the same |
| * as those in the projected bag |
| * |
| */ |
| public class TestForEach { |
| POForEach fe; |
| Tuple t; |
| DataBag db; |
| DataBag projDB; |
| |
| @Before |
| public void setUp() throws Exception { |
| Random r = new Random(); |
| db = GenRandomData.genRandSmallTupDataBagWithNulls(r, 10, 100); |
| projDB = TestHelper.projectBag(db, 0); |
| fe = GenPhyOp.topForEachOPWithPlan(0, db.iterator().next()); |
| POProject proj = GenPhyOp.exprProject(); |
| proj.setColumn(0); |
| proj.setResultType(DataType.TUPLE); |
| proj.setOverloaded(true); |
| Tuple t = new DefaultTuple(); |
| t.append(db); |
| proj.attachInput(t); |
| List<PhysicalOperator> inputs = new ArrayList<PhysicalOperator>(); |
| inputs.add(proj); |
| fe.setInputs(inputs); |
| } |
| |
| @Test |
| public void testGetNextTuple() throws ExecException, IOException { |
| int size = 0; |
| for (Result res = fe.getNextTuple(); res.returnStatus != POStatus.STATUS_EOP; res = fe |
| .getNextTuple()) { |
| Tuple t = (Tuple)res.result; |
| assertTrue(TestHelper.bagContains(projDB, t)); |
| ++size; |
| } |
| assertEquals(size, db.size()); |
| } |
| } |