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 * to you under the Apache License, Version 2.0 (the            *
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package org.apache.james.transport.mailets.delivery;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;

import java.time.Duration;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;

import org.apache.james.core.Username;
import org.apache.james.core.builder.MimeMessageBuilder;
import org.apache.james.mailbox.MailboxManager;
import org.apache.james.mailbox.MailboxSession;
import org.apache.james.mailbox.inmemory.manager.InMemoryIntegrationResources;
import org.apache.james.mailbox.model.FetchGroup;
import org.apache.james.mailbox.model.MailboxPath;
import org.apache.james.mailbox.model.MessageRange;
import org.apache.james.mailbox.model.MessageResultIterator;
import org.apache.james.util.concurrency.ConcurrentTestRunner;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.RepeatedTest;
import org.junit.jupiter.api.Test;

public class MailboxAppenderTest {

    public static final Username USER = Username.of("user");
    public static final String FOLDER = "folder";
    public static final String EMPTY_FOLDER = "";

    private MailboxAppender testee;
    private MailboxManager mailboxManager;
    private MimeMessage mimeMessage;
    private MailboxSession session;

    @BeforeEach
    void setUp() throws Exception {
        mimeMessage = MimeMessageBuilder.mimeMessageBuilder()
            .setMultipartWithBodyParts(
                MimeMessageBuilder.bodyPartBuilder()
                    .data("toto"))
            .build();

        mailboxManager = InMemoryIntegrationResources.defaultResources().getMailboxManager();
        testee = new MailboxAppender(mailboxManager);

        session = mailboxManager.createSystemSession(USER);
    }

    @Test
    void appendShouldAddMessageToDesiredMailbox() throws Exception {
        testee.append(mimeMessage, USER, FOLDER);

        MessageResultIterator messages = mailboxManager.getMailbox(MailboxPath.forUser(USER, FOLDER), session)
            .getMessages(MessageRange.all(), FetchGroup.FULL_CONTENT, session);

        assertThat(messages).toIterable()
            .hasSize(1);
    }

    @Test
    void appendShouldAddMessageToDesiredMailboxWhenMailboxExists() throws Exception {
        MailboxPath mailboxPath = MailboxPath.forUser(USER, FOLDER);
        mailboxManager.createMailbox(mailboxPath, session);

        testee.append(mimeMessage, USER, FOLDER);

        MessageResultIterator messages = mailboxManager.getMailbox(mailboxPath, session)
            .getMessages(MessageRange.all(), FetchGroup.FULL_CONTENT, session);

        assertThat(messages).toIterable()
            .hasSize(1);
    }

    @Test
    void appendShouldNotAppendToEmptyFolder() {
        assertThatThrownBy(() -> testee.append(mimeMessage, USER, EMPTY_FOLDER))
            .isInstanceOf(MessagingException.class);
    }

    @Test
    void appendShouldRemovePathSeparatorAsFirstChar() throws Exception {
        testee.append(mimeMessage, USER, "." + FOLDER);

        MessageResultIterator messages = mailboxManager.getMailbox(MailboxPath.forUser(USER, FOLDER), session)
            .getMessages(MessageRange.all(), FetchGroup.FULL_CONTENT, session);

        assertThat(messages).toIterable()
            .hasSize(1);
    }

    @Test
    void appendShouldReplaceSlashBySeparator() throws Exception {
        testee.append(mimeMessage, USER, FOLDER + "/any");

        MessageResultIterator messages = mailboxManager.getMailbox(MailboxPath.forUser(USER, FOLDER + ".any"), session)
            .getMessages(MessageRange.all(), FetchGroup.FULL_CONTENT, session);

        assertThat(messages).toIterable()
            .hasSize(1);
    }

    @RepeatedTest(20)
    void appendShouldNotFailInConcurrentEnvironment() throws Exception {
        ConcurrentTestRunner.builder()
            .operation((a, b) -> testee.append(mimeMessage, USER, FOLDER + "/any"))
            .threadCount(100)
            .runSuccessfullyWithin(Duration.ofMinutes(1));
    }
}
