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

 *

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 * published by the Free Software Foundation.

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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

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 *

 * 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.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

/*

 * @test

 * @bug 6797535 6889858 6891113

 * @summary Basic tests for methods in java.util.Objects

 * @author  Joseph D. Darcy

 */

import java.util.*;

public class BasicObjectsTest {

    public static void main(String... args) {

        int errors = 0;

        errors += testEquals();

        errors += testDeepEquals();

        errors += testHashCode();

        errors += testHash();

        errors += testToString();

        errors += testToString2();

        errors += testCompare();

        errors += testNonNull();

        if (errors > 0 )

            throw new RuntimeException();

    }

    private static int testEquals() {

        int errors = 0;

        Object[] values = {null, "42", 42};

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

            for(int j = 0; j < values.length; j++) {

                boolean expected = (i == j);

                Object a = values[i];

                Object b = values[j];

                boolean result = Objects.equals(a, b);

                if (result != expected) {

                    errors++;

                    System.err.printf("When equating %s to %s, got %b instead of %b%n.",

                                      a, b, result, expected);

                }

            }

        return errors;

    }

    private static int testDeepEquals() {

        int errors = 0;

        Object[] values = {null,

                           null, // Change to values later

                           new byte[]  {(byte)1},

                           new short[] {(short)1},

                           new int[]   {1},

                           new long[]  {1L},

                           new char[]  {(char)1},

                           new float[] {1.0f},

                           new double[]{1.0d},

                           new String[]{"one"}};

        values[1] = values;

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

            for(int j = 0; j < values.length; j++) {

                boolean expected = (i == j);

                Object a = values[i];

                Object b = values[j];

                boolean result = Objects.deepEquals(a, b);

                if (result != expected) {

                    errors++;

                    System.err.printf("When equating %s to %s, got %b instead of %b%n.",

                                      a, b, result, expected);

                }

            }

        return errors;

    }

    private static int testHashCode() {

        int errors = 0;

        errors += (Objects.hashCode(null) == 0 ) ? 0 : 1;

        String s = "42";

        errors += (Objects.hashCode(s) == s.hashCode() ) ? 0 : 1;

        return errors;

    }

    private static int testHash() {

        int errors = 0;

        Object[] data = new String[]{"perfect", "ham", "THC"};

        errors += ((Objects.hash((Object[])null) == 0) ? 0 : 1);

        errors += (Objects.hash("perfect", "ham", "THC") ==

                   Arrays.hashCode(data)) ? 0 : 1;

        return errors;

    }

    private static int testToString() {

        int errors = 0;

        errors += ("null".equals(Objects.toString(null)) ) ? 0 : 1;

        String s = "Some string";

        errors += (s.equals(Objects.toString(s)) ) ? 0 : 1;

        return errors;

    }

    private static int testToString2() {

        int errors = 0;

        String s = "not the default";

        errors += (s.equals(Objects.toString(null, s)) ) ? 0 : 1;

        errors += (s.equals(Objects.toString(s, "another string")) ) ? 0 : 1;

        return errors;

    }

    private static int testCompare() {

        int errors = 0;

        String[] values = {"e. e. cummings", "zzz"};

        String[] VALUES = {"E. E. Cummings", "ZZZ"};

        errors += compareTest(null, null, 0);

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

            String a = values[i];

            errors += compareTest(a, a, 0);

            for(int j = 0; j < VALUES.length; j++) {

                int expected = Integer.compare(i, j);

                String b = VALUES[j];

                errors += compareTest(a, b, expected);

            }

        }

        return errors;

    }

    private static int compareTest(String a, String b, int expected) {

        int errors = 0;

        int result = Objects.compare(a, b, String.CASE_INSENSITIVE_ORDER);

        if (Integer.signum(result) != Integer.signum(expected)) {

            errors++;

            System.err.printf("When comparing %s to %s, got %d instead of %d%n.",

                              a, b, result, expected);

        }

        return errors;

    }

    private static int testNonNull() {

        int errors = 0;

        String s;

        // Test 1-arg variant

        try {

            s = Objects.requireNonNull("pants");

            if (s != "pants") {

                System.err.printf("1-arg non-null failed to return its arg");

                errors++;

            }

        } catch (NullPointerException e) {

            System.err.printf("1-arg nonNull threw unexpected NPE");

            errors++;

        }

        try {

            s = Objects.requireNonNull(null);

            System.err.printf("1-arg nonNull failed to throw NPE");

            errors++;

        } catch (NullPointerException e) {

            // Expected

        }

        // Test 2-arg variant

        try {

            s = Objects.requireNonNull("pants", "trousers");

            if (s != "pants") {

                System.err.printf("2-arg nonNull failed to return its arg");

                errors++;

            }

        } catch (NullPointerException e) {

            System.err.printf("2-arg nonNull threw unexpected NPE");

            errors++;

        }

        try {

            s = Objects.requireNonNull(null, "pantaloons");

            System.err.printf("2-arg nonNull failed to throw NPE");

            errors++;

        } catch (NullPointerException e) {

            if (e.getMessage() != "pantaloons") {

                System.err.printf("2-arg nonNull threw NPE w/ bad detail msg");

                errors++;

            }

        }

        return errors;

    }

}