/*
* Copyright 1999-2015 dangdang.com.
* <p>
* Licensed 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.
* </p>
*/
package com.dangdang.ddframe.rdb.sharding.merger.pipeline.coupling.aggregation;
import org.junit.Test;
import java.math.BigDecimal;
import java.util.Arrays;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;
public final class AverageAggregationUnitTest {
@Test
public void assertAvgAggregation() {
AverageAggregationUnit avgAggregationUnit = new AverageAggregationUnit();
avgAggregationUnit.merge(null);
avgAggregationUnit.merge(Arrays.<Comparable<?>>asList(null, null));
avgAggregationUnit.merge(Arrays.<Comparable<?>>asList(1, null));
avgAggregationUnit.merge(Arrays.<Comparable<?>>asList(10, 50));
avgAggregationUnit.merge(Arrays.<Comparable<?>>asList(10, 20));
avgAggregationUnit.merge(Arrays.<Comparable<?>>asList(5, 40));
assertThat((BigDecimal) avgAggregationUnit.getResult(), is(new BigDecimal("4.4000")));
}
@Test
public void assertDivideZero() {
AverageAggregationUnit avgAggregationUnit = new AverageAggregationUnit();
avgAggregationUnit.merge(Arrays.<Comparable<?>>asList(0, 50));
avgAggregationUnit.merge(Arrays.<Comparable<?>>asList(0, 20));
avgAggregationUnit.merge(Arrays.<Comparable<?>>asList(0, 40));
assertThat((BigDecimal) avgAggregationUnit.getResult(), is(new BigDecimal(0)));
}
}