Update TestNumberInput.java (#988)

Author: pjfanning

src/test/java/com/fasterxml/jackson/core/io/TestNumberInput.java

@@ -52,5 +52,15 @@ public void testBigIntegerWithRadix()
         assertEquals(expected, NumberInput.parseBigIntegerWithRadix(val, radix, true));
         assertEquals(expected, NumberInput.parseBigIntegerWithRadix(val, radix, false));
     }
+
+    public void testParseBigIntegerFailsWithENotation()
+    {
+        try {
+            NumberInput.parseBigInteger("1e10");
+            fail("expected NumberFormatException");
+        } catch (NumberFormatException nfe) {
+            // expected
+        }
+    }
 }