Test Event Trigger interface for General Diagnostics Cluster (#18807)

Add TestEventTrigger Interface

src/app/TestEventTriggerDelegate.h

@@ -0,0 +1,48 @@
+/*
+ *    Copyright (c) 2022 Project CHIP Authors
+ *    All rights reserved.
+ *
+ *    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.
+ */
+
+#pragma once
+
+#include <lib/core/CHIPError.h>
+#include <lib/support/Span.h>
+#include <stddef.h>
+#include <stdint.h>
+
+namespace chip {
+
+class TestEventTriggerDelegate
+{
+public:
+    /**
+     * Checks to see if `enableKey` provided matches value chosen by the manufacturer.
+     *
+     * @param[in] enableKey Buffer of the key to verify.
+     */
+    virtual bool DoesEnableKeyMatch(const ByteSpan & enableKey) const = 0;
+
+    /**
+     * Expectation is that the caller has already validated the enable key before calling this.
+     * Handles the test event trigger based on `eventTrigger` provided.
+     *
+     * @param[in] eventTrigger Event trigger to handle.
+     *
+     * @return CHIP_ERROR_INVALID_ARGUMENT when eventTrigger is not a valid test event trigger.
+     */
+    virtual CHIP_ERROR HandleEventTrigger(uint64_t eventTrigger) = 0;
+};
+
+} // namespace chip