[bug-63842] FractionFormat casts whole part of the value into 'int'

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1868425 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 16 insertions, 0 deletions

diff --git a/src/testcases/org/apache/poi/ss/usermodel/TestFractionFormat.java b/src/testcases/org/apache/poi/ss/usermodel/TestFractionFormat.java
index e99c3fe698..dd08f6d799 100644
--- a/src/testcases/org/apache/poi/ss/usermodel/TestFractionFormat.java
+++ b/src/testcases/org/apache/poi/ss/usermodel/TestFractionFormat.java
@@ -41,6 +41,22 @@ public final class TestFractionFormat {
         String ret = f.format(val);
         assertEquals("26027/81", ret);
     }
+    
+    @Test
+    public void testWithBigWholePart() throws Exception {
+        FractionFormat f = new FractionFormat("#", "???/???");
+        
+        assertEquals("10100136259702", f.format(10100136259702d));
+        assertEquals("-10100136259702", f.format(-10100136259702d));
+        
+        // Excel displays fraction: 51/512
+        assertEquals("10100136259702 10/100", f.format(10100136259702.1d));
+        assertEquals("-10100136259702 10/100", f.format(-10100136259702.1d));
+        
+        // Excel displays fraction: 461/512
+        assertEquals("10100136259702 90/100", f.format(10100136259702.9d));
+        assertEquals("-10100136259702 90/100", f.format(-10100136259702.9d));
+    }
      
     @Test
     public void testTruthFile() throws Exception {