public void testGetParagraphByIndex() {
try {
TextDocument doc = TextDocument.newTextDocument();
Paragraph paragraph1 = doc.addParagraph("paragraph1");
Paragraph paragraphE = doc.addParagraph(null);
Paragraph paragraph2 = doc.addParagraph("p2");
Paragraph t1 = doc.getParagraphByIndex(1, false);
Assert.assertEquals(t1, paragraph1);
t1 = doc.getParagraphByIndex(3, false);
Assert.assertEquals(t1, paragraph2);