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package org.apache.james.transport.mailets.remote.delivery;

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

import org.apache.mailet.Attribute;
import org.apache.mailet.AttributeValue;
import org.apache.mailet.base.test.FakeMail;
import org.junit.jupiter.api.Test;

class DeliveryRetryHelperTest {
    private static final Attribute INVALID_ATTRIBUTE = new Attribute(DeliveryRetriesHelper.DELIVERY_RETRY_COUNT, AttributeValue.of("invalid"));

    @Test
    void retrieveRetriesShouldBeZeroByDefault() throws Exception {
        assertThat(DeliveryRetriesHelper.retrieveRetries(FakeMail.defaultFakeMail()))
            .isEqualTo(0);
    }

    @Test
    void retrieveRetriesShouldBeZeroAfterInit() throws Exception {
        FakeMail mail = FakeMail.defaultFakeMail();

        DeliveryRetriesHelper.initRetries(mail);

        assertThat(DeliveryRetriesHelper.retrieveRetries(mail))
            .isEqualTo(0);
    }

    @Test
    void retrieveRetriesShouldBeOneAfterIncrement() throws Exception {
        FakeMail mail = FakeMail.defaultFakeMail();

        DeliveryRetriesHelper.initRetries(mail);
        DeliveryRetriesHelper.incrementRetries(mail);

        assertThat(DeliveryRetriesHelper.retrieveRetries(mail))
            .isEqualTo(1);
    }

    @Test
    void incrementRetriesShouldWorkOnNonInitializedMails() throws Exception {
        FakeMail mail = FakeMail.defaultFakeMail();

        DeliveryRetriesHelper.incrementRetries(mail);

        assertThat(DeliveryRetriesHelper.retrieveRetries(mail))
            .isEqualTo(1);
    }

    @Test
    void retrieveRetriesShouldBeZeroOnInvalidValue() throws Exception {
        FakeMail mail = FakeMail.builder().name("name").attribute(INVALID_ATTRIBUTE).build();

        assertThat(DeliveryRetriesHelper.retrieveRetries(mail))
            .isEqualTo(0);
    }

    @Test
    void incrementRetriesShouldWorkOnInvalidMails() throws Exception {
        FakeMail mail = FakeMail.builder().name("name").attribute(INVALID_ATTRIBUTE).build();

        DeliveryRetriesHelper.incrementRetries(mail);

        assertThat(DeliveryRetriesHelper.retrieveRetries(mail))
            .isEqualTo(1);
    }
}
