| /* |
| * 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 java.io.FileWriter; |
| import java.io.PrintWriter; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.pig.PigServer; |
| import org.apache.pig.data.Tuple; |
| import org.junit.After; |
| import org.junit.AfterClass; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class TestLimitAdjuster { |
| |
| private static final MiniGenericCluster cluster = MiniGenericCluster.buildCluster(); |
| |
| private PigServer pig; |
| |
| @Before |
| public void setUp() throws Exception { |
| pig = new PigServer(cluster.getExecType(), cluster.getProperties()); |
| } |
| |
| @After |
| public void tearDown() throws Exception { |
| } |
| |
| @AfterClass |
| public static void oneTimeTearDown() throws Exception { |
| cluster.shutDown(); |
| } |
| |
| @Test |
| public void simpleTest() throws Exception { |
| String INPUT_FILE = "input"; |
| |
| PrintWriter w = new PrintWriter(new FileWriter(INPUT_FILE)); |
| w.println("1\torange"); |
| w.println("2\tapple"); |
| w.println("3\tcoconut"); |
| w.println("4\tmango"); |
| w.println("5\tgrape"); |
| w.println("6\tpear"); |
| w.close(); |
| |
| Util.copyFromLocalToCluster(cluster, INPUT_FILE, INPUT_FILE); |
| |
| pig.registerQuery("a = load '" + INPUT_FILE + "' as (x:int, y:chararray);"); |
| pig.registerQuery("b = order a by x parallel 2;"); |
| pig.registerQuery("c = limit b 1;"); |
| pig.registerQuery("d = foreach c generate y;"); |
| |
| List<Tuple> expectedResults = Util.getTuplesFromConstantTupleStrings( |
| new String[] { "('orange')" }); |
| |
| Iterator<Tuple> iter = pig.openIterator("d"); |
| int counter = 0; |
| while (iter.hasNext()) { |
| assertEquals(expectedResults.get(counter++).toString(), iter.next().toString()); |
| } |
| assertEquals(expectedResults.size(), counter); |
| } |
| |
| } |