/*
 * Copyright 2021 Paul Schaub.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package sop.util;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNull;

import java.util.Date;

import org.junit.jupiter.api.Test;

/**
 * Test parsing some date examples from the stateless OpenPGP CLI spec.
 *
 * @see <a href="https://datatracker.ietf.org/doc/html/draft-dkg-openpgp-stateless-cli-01#section-4.1">OpenPGP Stateless CLI §4.1. Date</a>
 */
public class UTCUtilTest {

    @Test
    public void parseExample1() {
        String timestamp = "2019-10-29T12:11:04+00:00";
        Date date = UTCUtil.parseUTCDate(timestamp);
        assertEquals("2019-10-29T12:11:04Z", UTCUtil.formatUTCDate(date));
    }

    @Test
    public void parseExample2() {
        String timestamp = "2019-10-24T23:48:29Z";
        Date date = UTCUtil.parseUTCDate(timestamp);
        assertEquals("2019-10-24T23:48:29Z", UTCUtil.formatUTCDate(date));
    }

    @Test
    public void parseExample3() {
        String timestamp = "20191029T121104Z";
        Date date = UTCUtil.parseUTCDate(timestamp);
        assertEquals("2019-10-29T12:11:04Z", UTCUtil.formatUTCDate(date));
    }

    @Test
    public void invalidDateReturnsNull() {
        String invalidTimestamp = "foobar";
        Date expectNull = UTCUtil.parseUTCDate(invalidTimestamp);
        assertNull(expectNull);
    }
}