/*
* 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.runtime.io.network;
import static org.junit.Assert.assertEquals;
import org.apache.flink.runtime.io.network.api.writer.RoundRobinChannelSelector;
import org.apache.flink.types.StringValue;
import org.junit.Test;
/**
* This class checks the functionality of the {@link RoundRobinChannelSelector} class.
*
*/
public class DefaultChannelSelectorTest {
/**
* This test checks the channel selection
*/
@Test
public void channelSelect() {
final StringValue dummyRecord = new StringValue("abc");
final RoundRobinChannelSelector<StringValue> selector = new RoundRobinChannelSelector<StringValue>();
// Test with two channels
final int numberOfOutputChannels = 2;
int[] selectedChannels = selector.selectChannels(dummyRecord, numberOfOutputChannels);
assertEquals(1, selectedChannels.length);
assertEquals(1, selectedChannels[0]);
selectedChannels = selector.selectChannels(dummyRecord, numberOfOutputChannels);
assertEquals(1, selectedChannels.length);
assertEquals(0, selectedChannels[0]);
}
}