Avoid double wrap of IndexedLambda

Change-Id: I2acaa255529949e8443542904df465e6b0fbb72a
diff --git a/core/common/src/test/java/org/onosproject/codec/impl/ConstraintCodecTest.java b/core/common/src/test/java/org/onosproject/codec/impl/ConstraintCodecTest.java
index 48c4817..a84dab4 100644
--- a/core/common/src/test/java/org/onosproject/codec/impl/ConstraintCodecTest.java
+++ b/core/common/src/test/java/org/onosproject/codec/impl/ConstraintCodecTest.java
@@ -146,7 +146,7 @@
         assertThat(constraint, instanceOf(LambdaConstraint.class));
 
         LambdaConstraint lambdaConstraint = (LambdaConstraint) constraint;
-        assertThat(lambdaConstraint.lambda().toInt(), is(444));
+        assertThat(lambdaConstraint.lambda().index(), is(444L));
     }
 
     /**