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/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * 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.
 */

package com.android.server.wifi;

import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.mock;

import android.os.Handler;
import android.os.Message;
import android.util.SparseArray;

import java.util.HashMap;
import java.util.Map;

/**
 * Creates a mock WifiMonitor.
 * WARNING: This does not perfectly mock the behavior of WifiMonitor at the moment
 *          ex. startMonitoring does nothing and will not send a connection/disconnection event
 */
public class MockWifiMonitor extends  WifiMonitor {
    private final Map<String, SparseArray<Handler>> mHandlerMap = new HashMap<>();

    public MockWifiMonitor() {
        super(mock(WifiInjector.class));
    }

    @Override
    public void registerHandler(String iface, int what, Handler handler) {
        SparseArray<Handler> ifaceHandlers = mHandlerMap.get(iface);
        if (ifaceHandlers == null) {
            ifaceHandlers = new SparseArray<>();
            mHandlerMap.put(iface, ifaceHandlers);
        }
        ifaceHandlers.put(what, handler);
    }

    @Override
    public synchronized void startMonitoring(String iface) {
        return;
    }

    /**
     * Send a message and assert that it was dispatched to a handler
     */
    public void sendMessage(String iface, int what) {
        sendMessage(iface, Message.obtain(null, what));
    }

    public void sendMessage(String iface, Message message) {
        SparseArray<Handler> ifaceHandlers = mHandlerMap.get(iface);
        if (ifaceHandlers != null) {
            assertTrue("No handler for iface=" + iface + ",what=" + message.what,
                    sendMessage(ifaceHandlers, message));
        } else {
            boolean sent = false;
            for (Map.Entry<String, SparseArray<Handler>> entry : mHandlerMap.entrySet()) {
                if (sendMessage(entry.getValue(), Message.obtain(message))) {
                    sent = true;
                }
            }
            assertTrue("No handler for message with nonexistant iface, iface=" + iface
                    + ",what=" + message.what, sent);
        }
    }

    private boolean sendMessage(SparseArray<Handler> ifaceHandlers, Message message) {
        Handler handler = ifaceHandlers.get(message.what);
        if (handler != null) {
            message.setTarget(handler);
            message.sendToTarget();
            return true;
        }
        return false;
    }

}