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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

 * 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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/* @test

 * @summary Basic functional test of OptionalInt

 * @author Mike Duigou

 * @run testng BasicInt

 */

import java.util.NoSuchElementException;

import java.util.OptionalInt;

import static org.testng.Assert.*;

import org.testng.annotations.Test;

public class BasicInt {

    @Test(groups = "unit")

    public void testEmpty() {

        OptionalInt empty = OptionalInt.empty();

        OptionalInt present = OptionalInt.of(1);

        // empty

        assertTrue(empty.equals(empty));

        assertTrue(empty.equals(OptionalInt.empty()));

        assertTrue(!empty.equals(present));

        assertTrue(0 == empty.hashCode());

        assertTrue(!empty.toString().isEmpty());

        assertTrue(!empty.isPresent());

        empty.ifPresent(v -> { fail(); });

        assertEquals(2, empty.orElse(2));

        assertEquals(2, empty.orElseGet(()-> 2));

    }

        @Test(expectedExceptions=NoSuchElementException.class)

        public void testEmptyGet() {

            OptionalInt empty = OptionalInt.empty();

            int got = empty.getAsInt();

        }

        @Test(expectedExceptions=NullPointerException.class)

        public void testEmptyOrElseGetNull() {

            OptionalInt empty = OptionalInt.empty();

            int got = empty.orElseGet(null);

        }

        @Test(expectedExceptions=NullPointerException.class)

        public void testEmptyOrElseThrowNull() throws Throwable {

            OptionalInt empty = OptionalInt.empty();

            int got = empty.orElseThrow(null);

        }

        @Test(expectedExceptions=ObscureException.class)

        public void testEmptyOrElseThrow() throws Exception {

            OptionalInt empty = OptionalInt.empty();

            int got = empty.orElseThrow(ObscureException::new);

        }

        @Test(groups = "unit")

        public void testPresent() {

        OptionalInt empty = OptionalInt.empty();

        OptionalInt present = OptionalInt.of(1);

        // present

        assertTrue(present.equals(present));

        assertFalse(present.equals(OptionalInt.of(0)));

        assertTrue(present.equals(OptionalInt.of(1)));

        assertFalse(present.equals(empty));

        assertTrue(Integer.hashCode(1) == present.hashCode());

        assertFalse(present.toString().isEmpty());

        assertTrue(-1 != present.toString().indexOf(Integer.toString(present.getAsInt()).toString()));

        assertEquals(1, present.getAsInt());

        try {

            present.ifPresent(v -> { throw new ObscureException(); });

            fail();

        } catch(ObscureException expected) {

        }

        assertEquals(1, present.orElse(2));

        assertEquals(1, present.orElseGet(null));

        assertEquals(1, present.orElseGet(()-> 2));

        assertEquals(1, present.orElseGet(()-> 3));

        assertEquals(1, present.<RuntimeException>orElseThrow(null));

        assertEquals(1, present.<RuntimeException>orElseThrow(ObscureException::new));

    }

    private static class ObscureException extends RuntimeException {

    }

}