make MockInvocation more benign, returning null for proxy instead of UnsupportedOperationExceptioncore/src/test/java/org/apache/commons/proxy2/util/MockInvocation.java

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/proxy/branches/version-2.0-work@1525264 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/core/src/test/java/org/apache/commons/proxy2/util/MockInvocation.java b/core/src/test/java/org/apache/commons/proxy2/util/MockInvocation.java
index 9075e42..92c74e5 100644
--- a/core/src/test/java/org/apache/commons/proxy2/util/MockInvocation.java
+++ b/core/src/test/java/org/apache/commons/proxy2/util/MockInvocation.java
@@ -45,7 +45,7 @@
     @Override
     public Object getProxy()
     {
-        throw new UnsupportedOperationException("Proxy objects aren't supported.");
+        return null;
     }
 
     @Override