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diff --git a/libccnx-transport-rta/ccnx/transport/transport_rta/components/component_Testing.h b/libccnx-transport-rta/ccnx/transport/transport_rta/components/component_Testing.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.
+ */
+
+/**
+ * @file component_Testing.h
+ * @brief A component that takes no actions, not even reads.
+ *
+ * This is useful to put in the stack around a component under test to
+ * isolate it from the system and then intercept the queues.
+ *
+ * This component may be used as both TESTING_UPPER and TESTING_LOWER
+ * to surround another component:
+ *
+ * { SYSTEM : COMPONENTS : [TESTING_UPPER, component under test, TESTING_LOWER] }
+ *
+ * In your test code, you would then have something like this to operate in
+ * the "down" direction:
+ *    PARCEventQueue *upper = rtaProtocolStack_GetPutQueue(stack, TESTING_UPPER, RTA_DOWN);
+ *    PARCEventQueue *rea   = rtaProtocolStack_GetPutQueue(stack, component under test, RTA_UP);
+ *    PARCEventQueue *lower = rtaProtocolStack_GetPutQueue(stack, TESTING_LOWER, RTA_UP);
+ *
+ */
+#ifndef Libccnx_component_Testing_h
+#define Libccnx_component_Testing_h
+
+#include <ccnx/transport/transport_rta/core/rta_Component.h>
+
+extern RtaComponentOperations testing_null_ops;
+#endif // Libccnx_component_Testing_h