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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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package org.openjdk.tests.java.util.stream;
import java.util.ArrayList;
import java.util.DoubleSummaryStatistics;
import java.util.IntSummaryStatistics;
import java.util.List;
import java.util.LongSummaryStatistics;
import java.util.stream.Collectors;
import java.util.stream.OpTestCase;
import org.testng.annotations.Test;
import static java.util.stream.LambdaTestHelpers.countTo;
/**
* TestSummaryStatistics
*
* @author Brian Goetz
*/
@Test
public class SummaryStatisticsTest extends OpTestCase {
public void testIntStatistics() {
List<IntSummaryStatistics> instances = new ArrayList<>();
instances.add(countTo(1000).stream().collect(Collectors.summarizingInt(i -> i)));
instances.add(countTo(1000).stream().mapToInt(i -> i).summaryStatistics());
instances.add(countTo(1000).parallelStream().collect(Collectors.summarizingInt(i -> i)));
instances.add(countTo(1000).parallelStream().mapToInt(i -> i).summaryStatistics());
for (IntSummaryStatistics stats : instances) {
assertEquals(stats.getCount(), 1000);
assertEquals(stats.getSum(), countTo(1000).stream().mapToInt(i -> i).sum());
assertEquals(stats.getMax(), 1000);
assertEquals(stats.getMin(), 1);
}
}
public void testLongStatistics() {
List<LongSummaryStatistics> instances = new ArrayList<>();
instances.add(countTo(1000).stream().collect(Collectors.summarizingLong(i -> i)));
instances.add(countTo(1000).stream().mapToLong(i -> i).summaryStatistics());
instances.add(countTo(1000).parallelStream().collect(Collectors.summarizingLong(i -> i)));
instances.add(countTo(1000).parallelStream().mapToLong(i -> i).summaryStatistics());
for (LongSummaryStatistics stats : instances) {
assertEquals(stats.getCount(), 1000);
assertEquals(stats.getSum(), (long) countTo(1000).stream().mapToInt(i -> i).sum());
assertEquals(stats.getMax(), 1000L);
assertEquals(stats.getMin(), 1L);
}
}
public void testDoubleStatistics() {
List<DoubleSummaryStatistics> instances = new ArrayList<>();
instances.add(countTo(1000).stream().collect(Collectors.summarizingDouble(i -> i)));
instances.add(countTo(1000).stream().mapToDouble(i -> i).summaryStatistics());
instances.add(countTo(1000).parallelStream().collect(Collectors.summarizingDouble(i -> i)));
instances.add(countTo(1000).parallelStream().mapToDouble(i -> i).summaryStatistics());
for (DoubleSummaryStatistics stats : instances) {
assertEquals(stats.getCount(), 1000);
assertEquals(stats.getSum(), (double) countTo(1000).stream().mapToInt(i -> i).sum());
assertEquals(stats.getMax(), 1000.0);
assertEquals(stats.getMin(), 1.0);
}
}
}