TestSlides.java

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   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
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       http://www.apache.org/licenses/LICENSE-2.0

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   distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.poi.hslf.model;

import static org.apache.poi.hslf.HSLFTestDataSamples.getSlideShow;
import static org.apache.poi.hslf.HSLFTestDataSamples.writeOutAndReadBack;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;

import org.apache.poi.hslf.usermodel.HSLFSlide;
import org.apache.poi.hslf.usermodel.HSLFSlideShow;
import org.junit.jupiter.api.Test;

/**
 * Test adding new slides to a ppt.
 *
 * Note - uses the same empty PPT file as the core "new Slideshow" stuff does
 */
public final class TestSlides {

    /**
     * Add 1 slide to an empty ppt.
     */
    @Test
    void testAddSlides1() throws Exception {
        try (HSLFSlideShow ppt1 = new HSLFSlideShow()) {
            assertTrue(ppt1.getSlides().isEmpty());

            HSLFSlide s1 = ppt1.createSlide();
            assertEquals(1, ppt1.getSlides().size());
            assertEquals(3, s1._getSheetRefId());
            assertEquals(256, s1._getSheetNumber());
            assertEquals(1, s1.getSlideNumber());

            //serialize and read again
            try (HSLFSlideShow ppt2 = writeOutAndReadBack(ppt1)){
                assertEquals(1, ppt2.getSlides().size());
            }
        }
    }

    /**
     * Add 2 slides to an empty ppt
     */
    @Test
    void testAddSlides2() throws Exception {
        try (HSLFSlideShow ppt1 = new HSLFSlideShow()) {
            assertTrue(ppt1.getSlides().isEmpty());

            HSLFSlide s1 = ppt1.createSlide();
            assertEquals(1, ppt1.getSlides().size());
            assertEquals(3, s1._getSheetRefId());
            assertEquals(256, s1._getSheetNumber());
            assertEquals(1, s1.getSlideNumber());

            HSLFSlide s2 = ppt1.createSlide();
            assertEquals(2, ppt1.getSlides().size());
            assertEquals(4, s2._getSheetRefId());
            assertEquals(257, s2._getSheetNumber());
            assertEquals(2, s2.getSlideNumber());

            //serialize and read again
            try (HSLFSlideShow ppt2 = writeOutAndReadBack(ppt1)) {
                assertEquals(2, ppt2.getSlides().size());
            }
        }
    }

    /**
     * Add 3 slides to an empty ppt
     */
    @Test
    void testAddSlides3() throws Exception {
        try (HSLFSlideShow ppt1 = new HSLFSlideShow()) {
            assertTrue(ppt1.getSlides().isEmpty());

            HSLFSlide s1 = ppt1.createSlide();
            assertEquals(1, ppt1.getSlides().size());
            assertEquals(3, s1._getSheetRefId());
            assertEquals(256, s1._getSheetNumber());
            assertEquals(1, s1.getSlideNumber());

            HSLFSlide s2 = ppt1.createSlide();
            assertEquals(2, ppt1.getSlides().size());
            assertEquals(4, s2._getSheetRefId());
            assertEquals(257, s2._getSheetNumber());
            assertEquals(2, s2.getSlideNumber());

            HSLFSlide s3 = ppt1.createSlide();
            assertEquals(3, ppt1.getSlides().size());
            assertEquals(5, s3._getSheetRefId());
            assertEquals(258, s3._getSheetNumber());
            assertEquals(3, s3.getSlideNumber());


            //serialize and read again
            try (HSLFSlideShow ppt2 = writeOutAndReadBack(ppt1)) {
                assertEquals(3, ppt2.getSlides().size());

                // Check IDs are still right
                s1 = ppt2.getSlides().get(0);
                assertEquals(256, s1._getSheetNumber());
                assertEquals(3, s1._getSheetRefId());
                s2 = ppt2.getSlides().get(1);
                assertEquals(257, s2._getSheetNumber());
                assertEquals(4, s2._getSheetRefId());
                s3 = ppt2.getSlides().get(2);
                assertEquals(3, ppt2.getSlides().size());
                assertEquals(258, s3._getSheetNumber());
                assertEquals(5, s3._getSheetRefId());
            }
        }
    }

    /**
     * Add slides to ppt which already has two slides
     */
    @Test
    void testAddSlides2to3() throws Exception {
        try (HSLFSlideShow ppt1 = getSlideShow("basic_test_ppt_file.ppt")) {

            assertEquals(2, ppt1.getSlides().size());

            // First slide is 256 / 4
            HSLFSlide s1 = ppt1.getSlides().get(0);
            assertEquals(256, s1._getSheetNumber());
            assertEquals(4, s1._getSheetRefId());

            // Last slide is 257 / 6
            HSLFSlide s2 = ppt1.getSlides().get(1);
            assertEquals(257, s2._getSheetNumber());
            assertEquals(6, s2._getSheetRefId());

            // Add another slide, goes in at the end
            HSLFSlide s3 = ppt1.createSlide();
            assertEquals(3, ppt1.getSlides().size());
            assertEquals(258, s3._getSheetNumber());
            assertEquals(8, s3._getSheetRefId());

            // Serialize and read again
            try (HSLFSlideShow ppt2 = writeOutAndReadBack(ppt1)) {
                assertEquals(3, ppt2.getSlides().size());

                // Check IDs are still right
                s1 = ppt2.getSlides().get(0);
                assertEquals(256, s1._getSheetNumber());
                assertEquals(4, s1._getSheetRefId());
                s2 = ppt2.getSlides().get(1);
                assertEquals(257, s2._getSheetNumber());
                assertEquals(6, s2._getSheetRefId());
                s3 = ppt2.getSlides().get(2);
                assertEquals(3, ppt2.getSlides().size());
                assertEquals(258, s3._getSheetNumber());
                assertEquals(8, s3._getSheetRefId());
            }
        }
    }
}