/**
* 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
* <p/>
* http://www.apache.org/licenses/LICENSE-2.0
* <p/>
* 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.bigtop.itest.datafu.stats;
import static org.junit.Assert.*;
import java.util.Iterator;
import org.apache.pig.data.Tuple;
import org.apache.pig.pigunit.PigTest;
import org.junit.Test;
import org.apache.bigtop.itest.datafu.PigTests;
public class MarkovPairTests extends PigTests
{
@Test
public void markovPairDefaultTest() throws Exception
{
PigTest test = createPigTest("datafu/stats/markovPairDefault.pig",
"schema=(data: bag {t: tuple(val:int)})");
writeLinesToFile("input", "{(10),(20),(30),(40),(50),(60)}");
String[] expectedOutput = {
"({((10),(20)),((20),(30)),((30),(40)),((40),(50)),((50),(60))})"
};
test.runScript();
Iterator<Tuple> actualOutput = test.getAlias("data_out");
assertTuplesMatch(expectedOutput, actualOutput);
}
@Test
public void markovPairMultipleInput() throws Exception
{
PigTest test = createPigTest("datafu/stats/markovPairDefault.pig",
"schema=(data: bag {t: tuple(val1:int,val2:int)})");
writeLinesToFile("input", "{(10,100),(20,200),(30,300),(40,400),(50,500),(60,600)}");
String[] expectedOutput = {
"({((10,100),(20,200)),((20,200),(30,300)),((30,300),(40,400)),((40,400),(50,500)),((50,500),(60,600))})"
};
test.runScript();
Iterator<Tuple> actualOutput = test.getAlias("data_out");
assertTuplesMatch(expectedOutput, actualOutput);
}
@Test
public void markovPairLookaheadTest() throws Exception
{
PigTest test = createPigTest("datafu/stats/markovPairLookahead.pig",
"schema=(data: bag {t: tuple(val:int)})",
"lookahead=3");
writeLinesToFile("input", "{(10),(20),(30),(40),(50)}");
String[] expectedOutput = {
"({((10),(20)),((10),(30)),((10),(40)),((20),(30)),((20),(40)),((20),(50)),((30),(40)),((30),(50)),((40),(50))})"
};
test.runScript();
Iterator<Tuple> actualOutput = test.getAlias("data_out");
assertTuplesMatch(expectedOutput, actualOutput);
}
private void assertTuplesMatch(String[] expectedOutput, Iterator<Tuple> actualOutput)
{
Iterator<Tuple> tuples = actualOutput;
for (String outputLine : expectedOutput)
{
assertTrue(tuples.hasNext());
Tuple outputTuple = tuples.next();
System.out.println(String.format("expected: %s", outputLine));
System.out.println(String.format("actual: %s", outputTuple.toString()));
assertEquals(outputLine,outputTuple.toString());
}
}
}