ojluni/src/test/java/util/stream/test/org/openjdk/tests/java/util/stream/CountLargeTest.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * 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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/**
 * @test
 * @summary Tests counting of streams containing Integer.MAX_VALUE + 1 elements
 * @bug 8031187
 */

package org.openjdk.tests.java.util.stream;

import java.util.stream.LongStream;

import org.testng.annotations.Test;

import static org.testng.Assert.*;

@Test
public class CountLargeTest {

    static final long EXPECTED_LARGE_COUNT = 1L + Integer.MAX_VALUE;

    public void testRefLarge() {
        long count = LongStream.range(0, EXPECTED_LARGE_COUNT)
                .mapToObj(e -> null).count();

        assertEquals(count, EXPECTED_LARGE_COUNT);
    }

    public void testIntLarge() {
        long count = LongStream.range(0, EXPECTED_LARGE_COUNT)
                .mapToInt(e -> 0).count();

        assertEquals(count, EXPECTED_LARGE_COUNT);
    }

    public void testLongLarge() {
        long count = LongStream.range(0, EXPECTED_LARGE_COUNT)
                .count();

        assertEquals(count, EXPECTED_LARGE_COUNT);
    }

    public void testDoubleLarge() {
        long count = LongStream.range(0, EXPECTED_LARGE_COUNT)
                .mapToDouble(e -> 0.0).count();

        assertEquals(count, EXPECTED_LARGE_COUNT);
    }
}