@Test
public void test_embedded_file_extraction_level_4() throws Exception {

    TikaDocumentSource textContent = new EmbeddedDocumentMemoryExtractor(new UpdatableDigester("prj", "SHA-256")).
            extract(tikaDocument, "c6eb226439d6a1a38ad23d69a98b2f321024eeb9ba32cd0238cc39a3d44b5130");
    assertThat(textContent).isNotNull();
    assertThat(new String(textContent.content)).isEqualTo("embed_4");
}