Avoiding hash collisions of a match with its reverse

[controller.git] / opendaylight / sal / api / src / test / java / org / opendaylight / controller / sal / match / MatchTest.java

diff --git a/opendaylight/sal/api/src/test/java/org/opendaylight/controller/sal/match/MatchTest.java b/opendaylight/sal/api/src/test/java/org/opendaylight/controller/sal/match/MatchTest.java
index 30d49cfd9dcc5b5abb90bafd659ac314e855f99a..b88ae034d9aa713c96f4ce3ef633f977d5a223b3 100644 (file)
--- a/opendaylight/sal/api/src/test/java/org/opendaylight/controller/sal/match/MatchTest.java
+++ b/opendaylight/sal/api/src/test/java/org/opendaylight/controller/sal/match/MatchTest.java
@@ -337,6 +337,21 @@ public class MatchTest {
         Assert.assertTrue(match1.equals(match2));
     }
 
+    @Test
+    public void testHashCodeWithReverseMatch() throws Exception {
+        InetAddress srcIP1 = InetAddress.getByName("1.1.1.1");
+        InetAddress ipMask1 = InetAddress.getByName("255.255.255.255");
+        InetAddress srcIP2 = InetAddress.getByName("2.2.2.2");
+        InetAddress ipMask2 = InetAddress.getByName("255.255.255.255");
+        MatchField field1 = new MatchField(MatchType.NW_SRC, srcIP1, ipMask1);
+        MatchField field2 = new MatchField(MatchType.NW_DST, srcIP2, ipMask2);
+        Match match1 = new Match();
+        match1.setField(field1);
+        match1.setField(field2);
+        Match match2 = match1.reverse();
+        Assert.assertFalse(match1.hashCode() == match2.hashCode());
+    }
+
     @Test
     public void testHashCode() throws Exception {
         byte srcMac1[] = { (byte) 0x12, (byte) 0x34, (byte) 0x56, (byte) 0x78, (byte) 0x9a, (byte) 0xbc };