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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * 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).

 *

 * You should have received a copy of the GNU General Public License version

 * 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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 */

import org.testng.annotations.Test;

import java.util.PrimitiveIterator;

import java.util.function.Consumer;

import java.util.function.DoubleConsumer;

import java.util.function.IntConsumer;

import java.util.function.LongConsumer;

import static org.testng.Assert.assertNotNull;

import static org.testng.Assert.assertTrue;

/**

 * @test

 * @run testng PrimitiveIteratorDefaults

 * @summary test default methods on PrimitiveIterator

 */

@Test

public class PrimitiveIteratorDefaults {

    public void testIntForEachRemainingWithNull() {

        PrimitiveIterator.OfInt i = new PrimitiveIterator.OfInt() {

            @Override

            public int nextInt() {

                return 0;

            }

            @Override

            public boolean hasNext() {

                return false;

            }

        };

        executeAndCatch(() -> i.forEachRemaining((IntConsumer) null));

        executeAndCatch(() -> i.forEachRemaining((Consumer<Integer>) null));

    }

    public void testLongForEachRemainingWithNull() {

        PrimitiveIterator.OfLong i = new PrimitiveIterator.OfLong() {

            @Override

            public long nextLong() {

                return 0;

            }

            @Override

            public boolean hasNext() {

                return false;

            }

        };

        executeAndCatch(() -> i.forEachRemaining((LongConsumer) null));

        executeAndCatch(() -> i.forEachRemaining((Consumer<Long>) null));

    }

    public void testDoubleForEachRemainingWithNull() {

        PrimitiveIterator.OfDouble i = new PrimitiveIterator.OfDouble() {

            @Override

            public double nextDouble() {

                return 0;

            }

            @Override

            public boolean hasNext() {

                return false;

            }

        };

        executeAndCatch(() -> i.forEachRemaining((DoubleConsumer) null));

        executeAndCatch(() -> i.forEachRemaining((Consumer<Double>) null));

    }

    private void executeAndCatch(Runnable r) {

        executeAndCatch(NullPointerException.class, r);

    }

    private void executeAndCatch(Class<? extends Exception> expected, Runnable r) {

        Exception caught = null;

        try {

            r.run();

        }

        catch (Exception e) {

            caught = e;

        }

        assertNotNull(caught,

                      String.format("No Exception was thrown, expected an Exception of %s to be thrown",

                                    expected.getName()));

        assertTrue(expected.isInstance(caught),

                   String.format("Exception thrown %s not an instance of %s",

                                 caught.getClass().getName(), expected.getName()));

    }

}