E Notation Number tests (#591)

Author: pjfanning

src/test/java/com/fasterxml/jackson/dataformat/xml/deser/RootValueDeserTest.java

@@ -1,5 +1,6 @@
 package com.fasterxml.jackson.dataformat.xml.deser;
 
+import java.math.BigDecimal;
 import java.math.BigInteger;
 
 import com.fasterxml.jackson.dataformat.xml.XmlMapper;
@@ -24,6 +25,14 @@ public void testNumbers() throws Exception
         _testScalar(BigInteger.valueOf(31337), "<BigInteger>31337</BigInteger>");
     }
 
+    public void testNumbersWithENotation() throws Exception
+    {
+        BigInteger bigInteger = new BigDecimal("2e308").toBigInteger();
+        _testScalar(bigInteger, "<BigInteger>" + bigInteger + "</BigInteger>");
+        BigDecimal bigDecimal = new BigDecimal("2e308");
+        _testScalar(bigDecimal, "<BigDecimal>" + bigDecimal + "</BigDecimal>");
+    }
+
     private void _testScalar(Object input, String exp) throws Exception {
         _testScalar(input, input.getClass(), exp);
     }
@@ -32,7 +41,7 @@ private void _testScalar(Object input, Class<?> type, String exp) throws Excepti
     {
         String xml = MAPPER.writeValueAsString(input).trim();
         assertEquals(exp, xml);
-        Object result = MAPPER.readValue(xml, input.getClass());
+        Object result = MAPPER.readValue(xml, type);
         assertEquals(input, result);
     }
 }