@Test
public void notIndirectSigDictionaryTest() throws IOException {

    String inPdf = sourceFolder + "notIndirectSigDictionaryTest.pdf";
    PdfReader reader = new PdfReader(inPdf);
    AcroFields acroFields = reader.getAcroFields();
    Assert.assertTrue(acroFields.signatureCoversWholeDocument("Signature1"));
}