Add a disabled unit test for bug #56420

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1607661 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/testcases/org/apache/poi/xssf/usermodel/TestXSSFBugs.java

@@ -1566,6 +1566,23 @@ public final class TestXSSFBugs extends BaseTestBugzillaIssues {
         bug53798Work(wb, xlsOutput);
     }
     
+    /**
+     * SUMIF was throwing a NPE on some formulas
+     */
+    @Test
+    @Ignore("This bug is still to be fixed")
+    public void testBug56420SumIfNPE() throws Exception {
+        XSSFWorkbook wb = XSSFTestDataSamples.openSampleWorkbook("56420.xlsx");
+        
+        FormulaEvaluator evaluator = wb.getCreationHelper().createFormulaEvaluator();
+
+        Sheet sheet = wb.getSheetAt(0);
+        Row r = sheet.getRow(2);
+        Cell c = r.getCell(2);
+        assertEquals("SUMIF($A$1:$A$4,A3,$B$1:$B$4)", c.getCellFormula());
+        evaluator.evaluateInCell(c);
+    }
+
     private void bug53798Work(Workbook wb, File xlsOutput) throws IOException {
         Sheet testSheet = wb.getSheetAt(0);