/*

 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

 * 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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 */

/**

 * @test

 * @bug 8155600

 * @summary Tests for Arrays.asList()

 * @run testng AsList

 */

import java.util.Arrays;

import java.util.Iterator;

import java.util.NoSuchElementException;

import java.util.stream.IntStream;

import org.testng.annotations.Test;

import org.testng.annotations.DataProvider;

import static org.testng.Assert.assertSame;

import static org.testng.Assert.assertTrue;

import static org.testng.Assert.assertFalse;

import static org.testng.Assert.fail;

public class AsList {

    /*

     * Iterator contract test

     */

    @Test(dataProvider = "Arrays")

    public void testIterator(Object[] array) {

        Iterator<Object> itr = Arrays.asList(array).iterator();

        for (int i = 0; i < array.length; i++) {

            assertTrue(itr.hasNext());

            assertTrue(itr.hasNext()); // must be idempotent

            assertSame(array[i], itr.next());

            try {

                itr.remove();

                fail("Remove must throw");

            } catch (UnsupportedOperationException ex) {

                // expected

            }

        }

        assertFalse(itr.hasNext());

        for (int i = 0; i < 3; i++) {

            assertFalse(itr.hasNext());

            try {

                itr.next();

                fail("Next succeed when there's no data left");

            } catch (NoSuchElementException ex) {

                // expected

            }

        }

    }

    @DataProvider(name = "Arrays")

    public static Object[][] arrays() {

        Object[][] arrays = {

            { new Object[] { } },

            { new Object[] { 1 } },

            { new Object[] { null } },

            { new Object[] { null, 1 } },

            { new Object[] { 1, null } },

            { new Object[] { null, null } },

            { new Object[] { null, 1, 2 } },

            { new Object[] { 1, null, 2 } },

            { new Object[] { 1, 2, null } },

            { new Object[] { null, null, null } },

            { new Object[] { 1, 2, 3, null, 4 } },

            { new Object[] { "a", "a", "a", "a" } },

            { IntStream.range(0, 100).boxed().toArray() }

        };

        return arrays;

    }

}