add dataformatter test

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1918819 13f79535-47bb-0310-9956-ffa450edef68

poi-ooxml/src/test/java/org/apache/poi/xssf/usermodel/TestXSSFDataFormat.java

@@ -31,6 +31,7 @@ import org.apache.poi.ss.usermodel.CellStyle;
 import org.apache.poi.ss.usermodel.DataFormat;
 import org.apache.poi.ss.usermodel.DataFormatter;
 import org.apache.poi.ss.usermodel.FormulaEvaluator;
+import org.apache.poi.ss.usermodel.Sheet;
 import org.apache.poi.ss.usermodel.Workbook;
 import org.apache.poi.ss.util.CellReference;
 import org.apache.poi.xssf.XSSFITestDataProvider;
@@ -160,4 +161,18 @@ public final class TestXSSFDataFormat extends BaseTestDataFormat {
         }
     }
 
+    @Test
+    public void testGitHub650() throws IOException {
+        // https://github.com/apache/poi/pull/650
+        DataFormatter df = new DataFormatter();
+
+        try (Workbook wb = _testDataProvider.openSampleWorkbook("decimal-format.xlsx")) {
+            Sheet sheet = wb.getSheetAt(0);
+            Cell cell1 = sheet.getRow(0).getCell(0);
+            assertEquals("1.01", df.formatCellValue(cell1));
+            Cell cell2 = sheet.getRow(1).getCell(0);
+            assertEquals("1.00", df.formatCellValue(cell2));
+        }
+    }
+
 }

poi/src/test/java/org/apache/poi/ss/usermodel/BaseTestDataFormat.java

@@ -38,7 +38,7 @@ public abstract class BaseTestDataFormat {
 
     protected static final String POUND_FMT = "\"\u00a3\"#,##0;[Red]\\-\"\u00a3\"#,##0";
 
-    private final ITestDataProvider _testDataProvider;
+    protected final ITestDataProvider _testDataProvider;
 
     protected BaseTestDataFormat(ITestDataProvider testDataProvider) {
         _testDataProvider = testDataProvider;