Improve test coverage

Change-Id: Ib3c220638790ea02ad7285916fc98320ecada31b
diff --git a/src/test/java/com/intel/jndn/management/NdnPingClientIT.java b/src/test/java/com/intel/jndn/management/NdnPingClientIT.java
index e0f9562..762ae7c 100644
--- a/src/test/java/com/intel/jndn/management/NdnPingClientIT.java
+++ b/src/test/java/com/intel/jndn/management/NdnPingClientIT.java
@@ -14,12 +14,14 @@
 package com.intel.jndn.management;
 
 import net.named_data.jndn.Face;
+import net.named_data.jndn.Name;
 import net.named_data.jndn.security.SecurityException;
 import org.junit.Before;
 import org.junit.Test;
 
 import java.io.IOException;
 
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
 /**
@@ -40,4 +42,10 @@
     boolean hasSucceeded = NdnPingClient.pingLocal(face);
     assertTrue(hasSucceeded);
   }
+
+  @Test
+  public void testFailedPing() {
+    boolean hasSucceeded = NdnPingClient.ping(face, new Name("/non/existent/name/of/data"));
+    assertFalse(hasSucceeded);
+  }
 }