server/protocols/jmap-rfc-8621/src/test/java/org/apache/james/jmap/model/PreviewDTOTest.java

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package org.apache.james.jmap.model;

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

import java.util.Optional;

import org.apache.james.jmap.api.model.Preview;
import org.junit.jupiter.api.Test;

import nl.jqno.equalsverifier.EqualsVerifier;

class PreviewDTOTest {

    private static final String EMPTY_PREVIEW = "(Empty)";
    private static final String SAMPLE_PREVIEW_VALUE = "hello bob!";

    @Test
    void shouldMatchBeanContract() {
        EqualsVerifier.forClass(PreviewDTO.class)
            .verify();
    }

    @Test
    void fromShouldReturnPreviewWithTheValue() {
        assertThat(PreviewDTO.from(Optional.of(Preview.from(SAMPLE_PREVIEW_VALUE))))
            .isEqualTo(PreviewDTO.of(SAMPLE_PREVIEW_VALUE));
    }

    @Test
    void fromShouldReturnNoBodyWhenNoPreview() {
        assertThat(PreviewDTO.from(Optional.empty()))
            .isEqualTo(PreviewDTO.of(EMPTY_PREVIEW));
    }

    @Test
    void fromShouldReturnNoBodyWhenPreviewOfEmptyString() {
        assertThat(PreviewDTO.from(Optional.of(Preview.from(""))))
            .isEqualTo(PreviewDTO.of(EMPTY_PREVIEW));
    }

    @Test
    void ofShouldReturnPreviewWithTheValue() {
        assertThat(PreviewDTO.of(SAMPLE_PREVIEW_VALUE))
            .isEqualTo(PreviewDTO.of(SAMPLE_PREVIEW_VALUE));
    }

    @Test
    void ofShouldReturnNoBodyWhenPreviewOfEmptyString() {
        assertThat(PreviewDTO.of(""))
            .isEqualTo(PreviewDTO.of(EMPTY_PREVIEW));
    }
}