Additional test.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1176809 13f79535-47bb-0310-9956-ffa450edef68

src/test/java/org/apache/commons/math/util/MathUtilsTest.java

@@ -1648,6 +1648,13 @@ public final class MathUtilsTest {
         } catch (NonMonotonicSequenceException e) {
             // Expected
         }
+        try {
+            MathUtils.checkOrder(new double[] {3, 0, -5.5, -11, -10},
+                                 MathUtils.OrderDirection.DECREASING, false);
+            Assert.fail("an exception should have been thrown");
+        } catch (NonMonotonicSequenceException e) {
+            // Expected
+        }
     }
 
     @Test