Unable to Find com.adobe.aemfd.docmanager.source.DocumentSourceHandler and How to Work Out java.lang.NoClassDefFoundError

import com.adobe.aemfd.docmanager.Document;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.w3c.dom.Element;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;

import static org.junit.jupiter.api.Assertions.*;

class TableOfContentTest {

    private Document pdfDoc;
    private ProcessInputXML processInputXML;
    private TableOfContent tableOfContent;

    @BeforeEach
    void setUp() throws Exception {
        // Load valid PDF content from a file or resource
        InputStream pdfInputStream = getClass().getResourceAsStream("/logo.pdf"); // Ensure this file exists in resources
        pdfDoc = new Document(pdfInputStream);

        // Initialize the ProcessInputXML object
        org.w3c.dom.Document inputXML = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
        processInputXML = new ProcessInputXML(inputXML);

        // Create the TableOfContent instance
        tableOfContent = new TableOfContent(pdfDoc, processInputXML);
    }
    @Test
    void shouldThrowAnExceptionOrHandleErrorsForANullTocMap()  {

        // Use the initialized tableOfContent instance
        assertNotNull(tableOfContent);
    }
}

InputStream pdfInputStream = getClass().getResourceAsStream("/logo.pdf");

pdfDoc = new Document(pdfInputStream);