/*
* 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.api.java.operator;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import org.apache.flink.api.common.InvalidProgramException;
import org.apache.flink.api.common.typeinfo.BasicTypeInfo;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.api.java.operators.UnsortedGrouping;
import org.apache.flink.api.java.tuple.Tuple5;
import org.apache.flink.api.java.typeutils.TupleTypeInfo;
import org.junit.Assert;
import org.junit.Test;
public class MaxByOperatorTest {
// TUPLE DATA
private final List<Tuple5<Integer, Long, String, Long, Integer>> emptyTupleData = new ArrayList<Tuple5<Integer, Long, String, Long, Integer>>();
private final TupleTypeInfo<Tuple5<Integer, Long, String, Long, Integer>> tupleTypeInfo = new TupleTypeInfo<Tuple5<Integer, Long, String, Long, Integer>>(
BasicTypeInfo.INT_TYPE_INFO, BasicTypeInfo.LONG_TYPE_INFO,
BasicTypeInfo.STRING_TYPE_INFO, BasicTypeInfo.LONG_TYPE_INFO,
BasicTypeInfo.INT_TYPE_INFO);
/**
* This test validates that no exceptions is thrown when an empty dataset
* calls maxBy().
*/
@Test
public void testMaxByKeyFieldsDataset() {
final ExecutionEnvironment env = ExecutionEnvironment
.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env
.fromCollection(emptyTupleData, tupleTypeInfo);
// should work
try {
tupleDs.maxBy(4, 0, 1, 2, 3);
} catch (Exception e) {
Assert.fail();
}
}
private final List<CustomType> customTypeData = new ArrayList<CustomType>();
/**
* This test validates that an InvalidProgrammException is thrown when maxBy
* is used on a custom data type.
*/
@Test(expected = InvalidProgramException.class)
public void testCustomKeyFieldsDataset() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
this.customTypeData.add(new CustomType());
DataSet<CustomType> customDs = env.fromCollection(customTypeData);
// should not work: groups on custom type
customDs.maxBy(0);
}
/**
* This test validates that an index which is out of bounds throws an
* IndexOutOfBOundsExcpetion.
*/
@Test(expected = IndexOutOfBoundsException.class)
public void testOutOfTupleBoundsDataset1() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should not work, key out of tuple bounds
tupleDs.maxBy(5);
}
/**
* This test validates that an index which is out of bounds throws an
* IndexOutOfBOundsExcpetion.
*/
@Test(expected = IndexOutOfBoundsException.class)
public void testOutOfTupleBoundsDataset2() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should not work, key out of tuple bounds
tupleDs.maxBy(-1);
}
/**
* This test validates that an index which is out of bounds throws an
* IndexOutOfBOundsExcpetion.
*/
@Test(expected = IndexOutOfBoundsException.class)
public void testOutOfTupleBoundsDataset3() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
DataSet<Tuple5<Integer, Long, String, Long, Integer>> tupleDs = env.fromCollection(emptyTupleData, tupleTypeInfo);
// should not work, key out of tuple bounds
tupleDs.maxBy(1,2,3,4,-1);
}
//---------------------------- GROUPING TESTS BELOW --------------------------------------
/**
* This test validates that no exceptions is thrown when an empty grouping
* calls maxBy().
*/
@Test
public void testMaxByKeyFieldsGrouping() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
UnsortedGrouping<Tuple5<Integer, Long, String, Long, Integer>> groupDs = env.fromCollection(emptyTupleData, tupleTypeInfo).groupBy(0);
// should work
try {
groupDs.maxBy(4, 0, 1, 2, 3);
} catch (Exception e) {
Assert.fail();
}
}
/**
* This test validates that an InvalidProgrammException is thrown when maxBy
* is used on a custom data type.
*/
@Test(expected = InvalidProgramException.class)
public void testCustomKeyFieldsGrouping() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
this.customTypeData.add(new CustomType());
UnsortedGrouping<CustomType> groupDs = env.fromCollection(customTypeData).groupBy(0);
// should not work: groups on custom type
groupDs.maxBy(0);
}
/**
* This test validates that an index which is out of bounds throws an
* IndexOutOfBOundsExcpetion.
*/
@Test(expected = IndexOutOfBoundsException.class)
public void testOutOfTupleBoundsGrouping1() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
UnsortedGrouping<Tuple5<Integer, Long, String, Long, Integer>> groupDs = env.fromCollection(emptyTupleData, tupleTypeInfo).groupBy(0);
// should not work, key out of tuple bounds
groupDs.maxBy(5);
}
/**
* This test validates that an index which is out of bounds throws an
* IndexOutOfBOundsExcpetion.
*/
@Test(expected = IndexOutOfBoundsException.class)
public void testOutOfTupleBoundsGrouping2() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
UnsortedGrouping<Tuple5<Integer, Long, String, Long, Integer>> groupDs = env.fromCollection(emptyTupleData, tupleTypeInfo).groupBy(0);
// should not work, key out of tuple bounds
groupDs.maxBy(-1);
}
/**
* This test validates that an index which is out of bounds throws an
* IndexOutOfBOundsExcpetion.
*/
@Test(expected = IndexOutOfBoundsException.class)
public void testOutOfTupleBoundsGrouping3() {
final ExecutionEnvironment env = ExecutionEnvironment.getExecutionEnvironment();
UnsortedGrouping<Tuple5<Integer, Long, String, Long, Integer>> groupDs = env.fromCollection(emptyTupleData, tupleTypeInfo).groupBy(0);
// should not work, key out of tuple bounds
groupDs.maxBy(1,2,3,4,-1);
}
/**
* Custom data type, for testing purposes.
*/
public static class CustomType implements Serializable {
private static final long serialVersionUID = 1L;
public int myInt;
public long myLong;
public String myString;
public CustomType() {
}
public CustomType(int i, long l, String s) {
myInt = i;
myLong = l;
myString = s;
}
@Override
public String toString() {
return myInt + "," + myLong + "," + myString;
}
}
}