server/mailet/mailets/src/test/java/org/apache/james/transport/util/ReplyToUtilsTest.java

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package org.apache.james.transport.util;

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

import java.util.Optional;

import org.apache.james.core.MailAddress;
import org.apache.james.transport.mailets.redirect.SpecialAddress;
import org.apache.mailet.base.test.FakeMail;
import org.junit.jupiter.api.Test;

class ReplyToUtilsTest {
    @Test
    void getReplyToShouldReturnAbsentWhenReplyToIsNull() throws Exception {
        ReplyToUtils testee = ReplyToUtils.from((MailAddress) null);

        FakeMail fakeMail = FakeMail.defaultFakeMail();

        Optional<MailAddress> replyTo = testee.getReplyTo(fakeMail);

        assertThat(replyTo).isEmpty();
    }

    @Test
    void getReplyToShouldReturnNullWhenReplyToEqualsToUnaltered() throws Exception {
        ReplyToUtils testee = ReplyToUtils.from(SpecialAddress.UNALTERED);

        FakeMail fakeMail = FakeMail.defaultFakeMail();

        Optional<MailAddress> replyTo = testee.getReplyTo(fakeMail);

        assertThat(replyTo).isEmpty();
    }

    @Test
    void getReplyToShouldReturnSenderWhenReplyToIsCommon() throws Exception {
        MailAddress mailAddress = new MailAddress("test", "james.org");
        ReplyToUtils testee = ReplyToUtils.from(mailAddress);

        MailAddress expectedMailAddress = new MailAddress("sender", "james.org");
        FakeMail fakeMail = FakeMail.builder()
                .name("name")
                .sender(expectedMailAddress)
                .build();

        Optional<MailAddress> replyTo = testee.getReplyTo(fakeMail);

        assertThat(replyTo).contains(expectedMailAddress);
    }
}