/*
 * Copyright (c) 2017 Pantheon Technologies s.r.o. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.yangtools.yang.common;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertThrows;
import static org.junit.Assert.assertTrue;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.time.format.DateTimeParseException;
import java.util.Optional;
import org.junit.Test;

public class RevisionTest {
    @Test
    public void testOf() {
        assertEquals("2017-12-25", Revision.of("2017-12-25").toString());
    }

    @Test
    public void testOfNull() {
        assertThrows(NullPointerException.class, () -> Revision.of(null));
    }

    @Test
    public void testOfEmpty() {
        assertThrows(DateTimeParseException.class, () -> Revision.of(""));
    }

    @Test
    public void testOfInvalid() {
        assertThrows(DateTimeParseException.class, () -> Revision.of("invalid"));
    }

    @Test
    public void testOfInvalidDate1() {
        assertThrows(DateTimeParseException.class, () -> Revision.of("2017-13-01"));
    }

    @Test
    public void testOfInvalidDate2() {
        assertThrows(DateTimeParseException.class, () -> Revision.of("2017-12-00"));
    }

    @Test
    public void testOfInvalidDate3() {
        assertThrows(DateTimeParseException.class, () -> Revision.of("2017-12-32"));
    }

    @Test
    public void testEquals() {
        final Revision rev1 = Revision.of("2017-12-25");
        final Revision rev1dup = Revision.of("2017-12-25");
        final Revision rev2 = Revision.of("2017-12-26");

        assertFalse(rev1.equals(null));
        assertTrue(rev1.equals(rev1));
        assertTrue(rev1.equals(rev1dup));
        assertTrue(rev1dup.equals(rev1));
        assertFalse(rev1.equals(rev2));
        assertFalse(rev2.equals(rev1));
    }

    @Test
    public void testOfNullable() {
        assertEquals(Optional.empty(), Revision.ofNullable(null));

        final Optional<Revision> opt = Revision.ofNullable("2017-12-25");
        assertTrue(opt.isPresent());
        assertEquals("2017-12-25", opt.get().toString());
    }

    @Test
    public void testCompareOptional() {
        assertEquals(0, Revision.compare(Optional.empty(), Optional.empty()));
        assertEquals(0, Revision.compare(Revision.ofNullable("2017-12-25"), Revision.ofNullable("2017-12-25")));
        assertEquals(-1, Revision.compare(Optional.empty(), Revision.ofNullable("2017-12-25")));
        assertEquals(1, Revision.compare(Revision.ofNullable("2017-12-25"), Optional.empty()));
    }

    @Test
    public void testSerialization() throws IOException, ClassNotFoundException {
        final Revision source = Revision.of("2017-12-25");
        final ByteArrayOutputStream bos = new ByteArrayOutputStream();
        try (ObjectOutputStream oos = new ObjectOutputStream(bos)) {
            oos.writeObject(source);
        }

        final Object read;
        try (ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(bos.toByteArray()))) {
            read = ois.readObject();
        }

        assertEquals(source, read);
    }
}