Index: test/org/apache/el/lang/TestELArithmetic.java
===================================================================
--- test/org/apache/el/lang/TestELArithmetic.java	(revision -1+:000000000000+)
+++ test/org/apache/el/lang/TestELArithmetic.java	(revision -1+:000000000000+)
@@ -0,0 +1,31 @@
+package org.apache.el.lang;
+
+import junit.framework.TestCase;
+
+import java.math.BigDecimal;
+import java.math.BigInteger;
+
+public class TestELArithmetic extends TestCase {
+    private final String a = "1.1";
+    private final BigInteger b = new BigInteger("1000000000000000000000");
+
+    public void testAdd() throws Exception {
+        assertEquals("1000000000000000000001.1", String.valueOf(ELArithmetic.add(a, b)));
+    }
+
+    public void testSubtract() throws Exception {
+        assertEquals("-999999999999999999998.9", String.valueOf(ELArithmetic.subtract(a, b)));
+    }
+
+    public void testMultiply() throws Exception {
+        assertEquals("1100000000000000000000.0", String.valueOf(ELArithmetic.multiply(a, b)));
+    }
+
+    public void testDivide() throws Exception {
+        assertEquals("0.0", String.valueOf(ELArithmetic.divide(a, b)));
+    }
+
+    public void testMod() throws Exception {
+        assertEquals("1.1", String.valueOf(ELArithmetic.mod(a, b)));
+    }
+}