flink-java/src/test/java/org/apache/flink/api/java/summarize/aggregation/BooleanSummaryAggregatorTest.java

/*
 * 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.summarize.aggregation;

import org.apache.flink.api.java.summarize.BooleanColumnSummary;

import org.junit.Assert;
import org.junit.Test;

/**
 * Tests for {@link BooleanSummaryAggregator}.
 */
public class BooleanSummaryAggregatorTest {

	@Test
	public void testMixedGroup() {
		BooleanColumnSummary summary = summarize(true, false, null, true, true, true, false, null, true, false, true);
		Assert.assertEquals(11, summary.getTotalCount());
		Assert.assertEquals(2, summary.getNullCount());
		Assert.assertEquals(9, summary.getNonNullCount());
		Assert.assertEquals(6, summary.getTrueCount());
		Assert.assertEquals(3, summary.getFalseCount());
	}

	@Test
	public void testAllNullBooleans() {
		BooleanColumnSummary summary = summarize(null, null, null, null);
		Assert.assertEquals(4, summary.getTotalCount());
		Assert.assertEquals(4, summary.getNullCount());
		Assert.assertEquals(0, summary.getNonNullCount());
		Assert.assertEquals(0, summary.getTrueCount());
		Assert.assertEquals(0, summary.getFalseCount());
	}

	@Test
	public void testAllTrue() {
		BooleanColumnSummary summary = summarize(true, true, true, true, true, true);
		Assert.assertEquals(6, summary.getTotalCount());
		Assert.assertEquals(0, summary.getNullCount());
		Assert.assertEquals(6, summary.getNonNullCount());
		Assert.assertEquals(6, summary.getTrueCount());
		Assert.assertEquals(0, summary.getFalseCount());
	}

	@Test
	public void testAllFalse() {
		BooleanColumnSummary summary = summarize(false, false, false);
		Assert.assertEquals(3, summary.getTotalCount());
		Assert.assertEquals(0, summary.getNullCount());
		Assert.assertEquals(3, summary.getNonNullCount());
		Assert.assertEquals(0, summary.getTrueCount());
		Assert.assertEquals(3, summary.getFalseCount());
	}

	/**
	 * Helper method for summarizing a list of values.
	 *
	 * <p>This method breaks the rule of "testing only one thing" by aggregating and combining
	 * a bunch of different ways.
	 */
	protected BooleanColumnSummary summarize(Boolean... values) {
		return new AggregateCombineHarness<Boolean, BooleanColumnSummary, BooleanSummaryAggregator>() {
			@Override
			protected void compareResults(BooleanColumnSummary result1, BooleanColumnSummary result2) {
				Assert.assertEquals(result1.getNullCount(), result2.getNullCount());
				Assert.assertEquals(result1.getNonNullCount(), result2.getNonNullCount());
				Assert.assertEquals(result1.getTrueCount(), result2.getTrueCount());
				Assert.assertEquals(result1.getFalseCount(), result2.getFalseCount());
			}
		}.summarize(values);
	}

}