@Test
public void test_embedded_file_extraction_level_2() throws Exception {

    TikaDocumentSource textContent = new EmbeddedDocumentMemoryExtractor(new UpdatableDigester("prj", "SHA-256")).
            extract(tikaDocument, "13d7b88767d478c03a3f9b01649297f254b3f0845ca1728658d7f7b922d28a32");
    assertThat(textContent).isNotNull();
    assertThat(new String(textContent.content)).isEqualTo("embed_1a");
}