public void TestRuns()
{
XWPFDocument doc = new XWPFDocument();
XWPFParagraph p = doc.CreateParagraph();
CT_R run = new CT_R();
XWPFRun r = new XWPFRun(run, doc.CreateParagraph());
p.AddRun(r);
p.AddRun(r);
Assert.IsNotNull(p.GetRun(run));
Assert.IsNull(p.GetRun(null));
}