public List<Chapter> getChapters() {
        return chapters;
    }
@Test
    public void testRealFileUltraschall() throws IOException, ID3ReaderException {
        CountingInputStream inputStream = new CountingInputStream(getClass().getClassLoader()
                .getResource("ultraschall5.mp3").openStream());
        ChapterReader reader = new ChapterReader(inputStream);
        reader.readInputStream();
        List<Chapter> chapters = reader.getChapters();

        assertEquals(3, chapters.size());

        assertEquals(0, chapters.get(0).getStart());
        assertEquals(4004, chapters.get(1).getStart());
        assertEquals(7999, chapters.get(2).getStart());

        assertEquals("Marke 1", chapters.get(0).getTitle());
        assertEquals("Marke 2", chapters.get(1).getTitle());
        assertEquals("Marke 3", chapters.get(2).getTitle());

        assertEquals("https://example.com", chapters.get(0).getLink());
        assertEquals("https://example.com", chapters.get(1).getLink());
        assertEquals("https://example.com", chapters.get(2).getLink());

        assertEquals(EmbeddedChapterImage.makeUrl(16073, 2750569), chapters.get(0).getImageUrl());
        assertEquals(EmbeddedChapterImage.makeUrl(2766765, 15740), chapters.get(1).getImageUrl());
        assertEquals(EmbeddedChapterImage.makeUrl(2782628, 2750569), chapters.get(2).getImageUrl());
    }