org.apache.james.jmap.utils.MimeMessageBodyGeneratorTest.java Source code

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Here is the source code for org.apache.james.jmap.utils.MimeMessageBodyGeneratorTest.java

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package org.apache.james.jmap.utils;

import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verifyZeroInteractions;
import static org.mockito.Mockito.when;

import java.util.Optional;
import java.util.Properties;

import javax.mail.Session;
import javax.mail.internet.MimeMessage;

import org.apache.commons.io.IOUtils;
import org.junit.Before;
import org.junit.Test;

public class MimeMessageBodyGeneratorTest {

    private MimeMessageBodyGenerator mimeMessageBodyGenerator;
    private HtmlTextExtractor htmlTextExtractor;
    private MimeMessage original;

    @Before
    public void setUp() {
        original = new MimeMessage(Session.getDefaultInstance(new Properties()));
        htmlTextExtractor = mock(HtmlTextExtractor.class);
        mimeMessageBodyGenerator = new MimeMessageBodyGenerator(htmlTextExtractor);
    }

    @Test
    public void fromShouldNotWriteAMultipartWhenOnlyPlainText() throws Exception {
        assertThat(IOUtils.toString(mimeMessageBodyGenerator
                .from(original, Optional.of("Plain text"), Optional.empty()).getInputStream()))
                        .isEqualTo("Plain text");
        verifyZeroInteractions(htmlTextExtractor);
    }

    @Test
    public void fromShouldPreservePreviouslySetHeaders() throws Exception {
        String subject = "Important, I should be kept";
        original.setHeader("Subject", subject);

        mimeMessageBodyGenerator.from(original, Optional.of("Plain text"), Optional.empty()).getInputStream();

        assertThat(original.getSubject()).isEqualTo(subject);
        verifyZeroInteractions(htmlTextExtractor);
    }

    @Test
    public void fromShouldProvideAPlainTextVersionWhenOnlyHtml() throws Exception {
        String htmlText = "<p>HTML text</p>";
        String plainText = "Plain text";
        when(htmlTextExtractor.toPlainText(htmlText)).thenReturn(plainText);

        String rowContent = IOUtils.toString(
                mimeMessageBodyGenerator.from(original, Optional.empty(), Optional.of(htmlText)).getInputStream());

        assertThat(rowContent).containsSequence(htmlText);
        assertThat(rowContent).containsSequence(plainText);
    }

    @Test
    public void fromShouldCombinePlainTextAndHtml() throws Exception {
        String htmlText = "<p>HTML text</p>";
        String plainText = "Plain text";

        String rowContent = IOUtils.toString(mimeMessageBodyGenerator
                .from(original, Optional.of(plainText), Optional.of(htmlText)).getInputStream());

        assertThat(rowContent).containsSequence(htmlText);
        assertThat(rowContent).containsSequence(plainText);
        verifyZeroInteractions(htmlTextExtractor);
    }

    @Test
    public void fromShouldUseEmptyTextWhenNoPlainTextNorHtmlBody() throws Exception {
        String rowContent = IOUtils.toString(
                mimeMessageBodyGenerator.from(original, Optional.empty(), Optional.empty()).getInputStream());

        assertThat(rowContent).isEmpty();
    }

    @Test
    public void fromShouldThrowOnNullPlainText() throws Exception {
        assertThatThrownBy(() -> mimeMessageBodyGenerator.from(original, null, Optional.empty()))
                .isInstanceOf(NullPointerException.class);
    }

    @Test
    public void fromShouldThrowOnNullHtml() throws Exception {
        assertThatThrownBy(() -> mimeMessageBodyGenerator.from(original, Optional.empty(), null))
                .isInstanceOf(NullPointerException.class);
    }

    @Test
    public void fromShouldThrowOnNullMimeMessageToDecorate() throws Exception {
        assertThatThrownBy(() -> mimeMessageBodyGenerator.from(null, Optional.empty(), Optional.empty()))
                .isInstanceOf(NullPointerException.class);
    }

}