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* 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.assertNull;
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.util.Iterator;
import java.util.Random;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.pig.ExecType;
import org.apache.pig.PigServer;
import org.apache.pig.builtin.PigStorage;
import org.apache.pig.data.DataType;
import org.apache.pig.data.Tuple;
import org.junit.Before;
import org.junit.Test;
public class TestInfixArithmetic {
private final Log log = LogFactory.getLog(getClass());
private static int LOOP_COUNT = 1024;
private PigServer pig;
@Before
public void setUp() throws Exception {
pig = new PigServer(ExecType.LOCAL);
}
Boolean[] nullFlags = new Boolean[] { false, true };
@Test
public void testAdd() throws Throwable {
File tmpFile = File.createTempFile("test", "txt");
for (int i = 0; i < nullFlags.length; i++) {
System.err.println("Testing with nulls: " + nullFlags[i]);
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
generateInput(ps, nullFlags[i]);
String query = "A = foreach (load '"
+ Util.generateURI(tmpFile.toString(), pig.getPigContext())
+ "' using " + PigStorage.class.getName()
+ "(':')) generate $0, $0 + $1, $1;";
log.info(query);
pig.registerQuery(query);
Iterator<Tuple> it = pig.openIterator("A");
tmpFile.delete();
while(it.hasNext()) {
Tuple t = it.next();
Double first = (t.get(0) == null ? null :DataType.toDouble(t.get(0)));
Double second = (t.get(1) == null ? null :DataType.toDouble(t.get(1)));
Double third = (t.get(2) == null ? null :DataType.toDouble(t.get(2)));
if(first != null && third != null) {
assertEquals(Double.valueOf(first + first), second);
} else {
assertNull(second);
}
}
}
}
@Test
public void testSubtract() throws Throwable {
File tmpFile = File.createTempFile("test", "txt");
for (int i = 0; i < nullFlags.length; i++) {
System.err.println("Testing with nulls: " + nullFlags[i]);
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
generateInput(ps, nullFlags[i]);
String query = "A = foreach (load '"
+ Util.generateURI(tmpFile.toString(), pig.getPigContext())
+ "' using " + PigStorage.class.getName()
+ "(':')) generate $0, $0 - $1, $1 ;";
log.info(query);
pig.registerQuery(query);
Iterator<Tuple> it = pig.openIterator("A");
tmpFile.delete();
while(it.hasNext()) {
Tuple t = it.next();
Double first = (t.get(0) == null ? null :DataType.toDouble(t.get(0)));
Double second = (t.get(1) == null ? null :DataType.toDouble(t.get(1)));
Double third = (t.get(2) == null ? null :DataType.toDouble(t.get(2)));
if(first != null && third != null) {
assertEquals(Double.valueOf(0.0), second);
} else {
assertNull(second);
}
}
}
}
@Test
public void testMultiply() throws Throwable {
File tmpFile = File.createTempFile("test", "txt");
for (int i = 0; i < nullFlags.length; i++) {
System.err.println("Testing with nulls: " + nullFlags[i]);
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
generateInput(ps, nullFlags[i]);
String query = "A = foreach (load '"
+ Util.generateURI(tmpFile.toString(), pig.getPigContext())
+ "' using " + PigStorage.class.getName()
+ "(':')) generate $0, $0 * $1, $1 ;";
log.info(query);
pig.registerQuery(query);
Iterator<Tuple> it = pig.openIterator("A");
tmpFile.delete();
while(it.hasNext()) {
Tuple t = it.next();
Double first = (t.get(0) == null ? null :DataType.toDouble(t.get(0)));
Double second = (t.get(1) == null ? null :DataType.toDouble(t.get(1)));
Double third = (t.get(2) == null ? null :DataType.toDouble(t.get(2)));
if(first != null && third != null) {
assertEquals(Double.valueOf(first * first), second);
} else {
assertNull(second);
}
}
}
}
@Test
public void testDivide() throws Throwable {
File tmpFile = File.createTempFile("test", "txt");
for (int i = 0; i < nullFlags.length; i++) {
System.err.println("Testing with nulls: " + nullFlags[i]);
PrintStream ps = new PrintStream(new FileOutputStream(tmpFile));
generateInput(ps, nullFlags[i]);
String query = "A = foreach (load '"
+ Util.generateURI(tmpFile.toString(), pig.getPigContext())
+ "' using " + PigStorage.class.getName()
+ "(':')) generate $0, $0 / $1, $1 ;";
log.info(query);
pig.registerQuery(query);
Iterator<Tuple> it = pig.openIterator("A");
tmpFile.delete();
while(it.hasNext()) {
Tuple t = it.next();
Double first = (t.get(0) == null ? null :DataType.toDouble(t.get(0)));
Double second = (t.get(1) == null ? null :DataType.toDouble(t.get(1)));
Double third = (t.get(2) == null ? null :DataType.toDouble(t.get(2)));
if(first != null && third != null) {
assertEquals(Double.valueOf(1.0), second);
} else {
assertNull(second);
}
}
}
}
private void generateInput(PrintStream ps, boolean withNulls) {
if(withNulls) {
// inject nulls randomly
for(int i = 1; i < LOOP_COUNT; i++) {
int rand = new Random().nextInt(LOOP_COUNT);
if(rand <= (0.2 * LOOP_COUNT) ) {
ps.println(":"+i);
} else if (rand > (0.2 * LOOP_COUNT) && rand <= (0.4 * LOOP_COUNT)) {
ps.println(i+":");
} else if (rand > (0.2 * LOOP_COUNT) && rand <= (0.4 * LOOP_COUNT)) {
ps.println(":");
} else {
ps.println(i + ":" + i);
}
}
} else {
for(int i = 1; i < LOOP_COUNT; i++) {
ps.println(i + ":" + i);
}
}
ps.close();
}
}