assertEquals(1, ptgs.length);
assertTrue(ptgs[0] instanceof Ref3DPtg);
Ref3DPtg ptg = (Ref3DPtg)ptgs[0];
HSSFEvaluationWorkbook book = HSSFEvaluationWorkbook.create(stubHSSF);
assertEquals("Sheet1!A1", ptg.toFormulaString(book));
// Now check we get the right formula back for
// a few sample ones
FormulaRecord fr;