Add tests to try and break createNumber exponent handling

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@1461698 13f79535-47bb-0310-9956-ffa450edef68

src/test/java/org/apache/commons/lang3/math/NumberUtilsTest.java

@@ -239,6 +239,24 @@ public class NumberUtilsTest {
         NumberUtils.createNumber("--1.1E-700F");
     }
 
+    @Test(expected=NumberFormatException.class)
+    // Check that the code fails to create a valid number when both e and E are present (with decimal)
+    public void testCreateNumberFailure_2() {
+        NumberUtils.createNumber("-1.1E+0-7e00");
+    }
+
+    @Test(expected=NumberFormatException.class)
+    // Check that the code fails to create a valid number when both e and E are present (no decimal)
+    public void testCreateNumberFailure_3() {
+        NumberUtils.createNumber("-11E+0-7e00");
+    }
+
+    @Test(expected=NumberFormatException.class)
+    // Check that the code fails to create a valid number when both e and E are present (no decimal)
+    public void testCreateNumberFailure_4() {
+        NumberUtils.createNumber("1eE+00001");
+    }
+
     // Tests to show when magnitude causes switch to next Number type
     // Will probably need to be adjusted if code is changed to check precision (LANG-693)
     @Test