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 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
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package org.apache.james.queue.memory;

import static org.apache.james.queue.api.Mails.defaultMail;
import static org.assertj.core.api.Assertions.assertThat;

import org.apache.james.queue.api.DelayedManageableMailQueueContract;
import org.apache.james.queue.api.MailQueue;
import org.apache.james.queue.api.ManageableMailQueue;
import org.apache.james.queue.api.RawMailQueueItemDecoratorFactory;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

public class MemoryMailQueueTest implements DelayedManageableMailQueueContract {

    private MemoryMailQueueFactory.MemoryMailQueue mailQueue;

    @BeforeEach
    public void setUp() {
        mailQueue = new MemoryMailQueueFactory.MemoryMailQueue("test", new RawMailQueueItemDecoratorFactory());
    }

    @Override
    public MailQueue getMailQueue() {
        return mailQueue;
    }

    @Test
    public void getLastMailShouldReturnNullWhenNoMail() throws Exception {
        assertThat(mailQueue.getLastMail())
            .isNull();
    }

    @Test
    public void getLastMailShouldReturnSingleMail() throws Exception {
        mailQueue.enQueue(defaultMail()
            .name("name")
            .build());

        assertThat(mailQueue.getLastMail().getName())
            .isEqualTo("name");
    }

    @Test
    public void getLastMailShouldReturnLastEnqueuedMail() throws Exception {
        mailQueue.enQueue(defaultMail()
            .name("name1")
            .build());
        mailQueue.enQueue(defaultMail()
            .name("name2")
            .build());

        assertThat(mailQueue.getLastMail().getName())
            .isEqualTo("name2");
    }

    @Test
    public void getLastMailShouldNotAlterMailQueueState() throws Exception {
        mailQueue.enQueue(defaultMail()
            .name("name1")
            .build());
        mailQueue.enQueue(defaultMail()
            .name("name2")
            .build());

        mailQueue.getLastMail();
        assertThat(mailQueue.getLastMail().getName())
            .isEqualTo("name2");
    }

    @Override
    public ManageableMailQueue getManageableMailQueue() {
        return mailQueue;
    }
}
