BATCH-261:Added an extra test case to FieldSetTests to ensure padded input doesn't cause issues in the FieldSet. As mentioned in the issue, the BeanWrapperFieldSetMapper is likely causing the issue.

spring-batch-infrastructure/src/test/java/org/springframework/batch/io/file/FieldSetTests.java

@@ -428,4 +428,11 @@ public class FieldSetTests extends TestCase {
 			assertEquals(tokens[i], values[i]);
 		}
 	}
+	
+	public void testPaddedLong(){
+		FieldSet fs = new FieldSet(new String[]{"00000009"});
+		
+		long value = fs.readLong(0);
+		assertEquals(value, 9);
+	}
 }