1 files changed, 10 insertions, 0 deletions
diff --git a/luni/src/test/java/org/apache/harmony/security/tests/java/security/Signature2Test.java b/luni/src/test/java/org/apache/harmony/security/tests/java/security/Signature2Test.java
index 7886e3e..ad084e1 100644
--- a/luni/src/test/java/org/apache/harmony/security/tests/java/security/Signature2Test.java
+++ b/luni/src/test/java/org/apache/harmony/security/tests/java/security/Signature2Test.java
@@ -68,7 +68,17 @@ public class Signature2Test extends junit.framework.TestCase {
      * java.security.Signature#clone()
      */
     public void test_clone() throws Exception {
+        // A Signature may be cloneable according to the API, in practice the implementation isn't
+        // once it has been initialized. Checking for runtime exceptions rather than useful
+        // behavior.
         Signature s = Signature.getInstance("DSA");
+        Signature clone = (Signature) s.clone();
+        assertNotNull(clone);
+        assertEquals(s.getAlgorithm(), clone.getAlgorithm());
+        assertEquals(s.getProvider(), clone.getProvider());
+
+        KeyPair keyPair = getDsaKeys();
+        s.initSign(keyPair.getPrivate());
         try {
             s.clone();
             fail();