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diff --git a/metis/ccnx/forwarder/metis/processor/test/testrig_MockTap.h b/metis/ccnx/forwarder/metis/processor/test/testrig_MockTap.h
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+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#ifndef Metis_testrig_MockTap_h
+#define Metis_testrig_MockTap_h
+
+// =========================================================================
+// Mock for tap testing
+// Allows the test to set the IsTapOnX return values.
+// Counts the number of calls to each TapOnX.
+// Records the last message pointer
+// The user sets and examines values in the static "testTap" variable and
+// passes "testTapTemplate" to the tap setup.
+
+static bool testTap_IsTapOnReceive(const MetisTap *tap);
+static bool testTap_IsTapOnSend(const MetisTap *tap);
+static bool testTap_IsTapOnDrop(const MetisTap *tap);
+static void testTap_TapOnReceive(MetisTap *tap, const MetisMessage *message);
+static void testTap_TapOnSend(MetisTap *tap, const MetisMessage *message);
+static void testTap_TapOnDrop(MetisTap *tap, const MetisMessage *message);
+
+// this test variable is zeroed in each FIXTURE_SETUP.
+// To test tap functionality, set the various callOnX flags, run your test,
+// then check the onXCounts to make sure they are right.
+struct testTap_s {
+    bool callOnReceive;
+    bool callOnSend;
+    bool callOnDrop;
+    unsigned onReceiveCount;
+    unsigned onSendCount;
+    unsigned onDropCount;
+
+    const MetisMessage *lastMessage;
+} testTap;
+
+// you should not need tochange this template
+MetisTap testTapTemplate = {
+    .context        = &testTap,
+    .isTapOnReceive = &testTap_IsTapOnReceive,
+    .isTapOnSend    = &testTap_IsTapOnSend,
+    .isTapOnDrop    = &testTap_IsTapOnDrop,
+    .tapOnReceive   = &testTap_TapOnReceive,
+    .tapOnSend      = &testTap_TapOnSend,
+    .tapOnDrop      = &testTap_TapOnDrop
+};
+
+static bool
+testTap_IsTapOnReceive(const MetisTap *tap)
+{
+    struct testTap_s *mytap = (struct testTap_s *) tap->context;
+    return mytap->callOnReceive;
+}
+
+static bool
+testTap_IsTapOnSend(const MetisTap *tap)
+{
+    struct testTap_s *mytap = (struct testTap_s *) tap->context;
+    return mytap->callOnSend;
+}
+
+static bool
+testTap_IsTapOnDrop(const MetisTap *tap)
+{
+    struct testTap_s *mytap = (struct testTap_s *) tap->context;
+    return mytap->callOnDrop;
+}
+
+static void
+testTap_TapOnReceive(MetisTap *tap, const MetisMessage *message)
+{
+    struct testTap_s *mytap = (struct testTap_s *) tap->context;
+    mytap->onReceiveCount++;
+    mytap->lastMessage = message;
+}
+
+static void
+testTap_TapOnSend(MetisTap *tap, const MetisMessage *message)
+{
+    struct testTap_s *mytap = (struct testTap_s *) tap->context;
+    mytap->onSendCount++;
+    mytap->lastMessage = message;
+}
+
+static void
+testTap_TapOnDrop(MetisTap *tap, const MetisMessage *message)
+{
+    struct testTap_s *mytap = (struct testTap_s *) tap->context;
+    mytap->onDropCount++;
+    mytap->lastMessage = message;
+}
+#endif // Metis_testrig_MockTap_h