tests/api_test/src/com/android/support/car/apitest/MockedCarTestBase.java

/*
 * 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.support.car.apitest;

import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;

import com.android.car.VehicleHalEmulator;

import android.content.ComponentName;
import android.os.IBinder;
import android.support.car.Car;
import android.support.car.ServiceConnectionListener;
import android.test.AndroidTestCase;
import android.util.Log;

/**
 * Base class for testing with mocked vehicle HAL (=car).
 * It is up to each app to start emulation by getVehicleHalEmulator().start() as there will be
 * per test set up that should be done before starting.
 */
public class MockedCarTestBase extends AndroidTestCase {
    private static final String TAG = MockedCarTestBase.class.getSimpleName();
    private static final long DEFAULT_WAIT_TIMEOUT_MS = 3000;

    private Car mCar;
    private VehicleHalEmulator mVehicleHalEmulator;

    private final Semaphore mConnectionWait = new Semaphore(0);

    private final ServiceConnectionListener mConnectionListener = new ServiceConnectionListener() {

        @Override
        public void onServiceSuspended(int cause) {
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
        }

        @Override
        public void onServiceConnectionFailed(int cause) {
        }

        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            Log.i(TAG, "onServiceConnected, component" + name + " binder " + service);
            mConnectionWait.release();
        }
    };

    @Override
    protected synchronized void setUp() throws Exception {
        super.setUp();
        mCar = new Car(getContext(), mConnectionListener, null);
        mCar.connect();
        assertTrue(waitForConnection(DEFAULT_WAIT_TIMEOUT_MS));
        mVehicleHalEmulator = new VehicleHalEmulator(mCar);
    }

    @Override
    protected synchronized void tearDown() throws Exception {
        super.tearDown();
        if (mVehicleHalEmulator.isStarted()) {
            mVehicleHalEmulator.stop();
        }
        mCar.disconnect();
    }

    protected synchronized Car getCarApi() {
        return mCar;
    }

    protected synchronized VehicleHalEmulator getVehicleHalEmulator() {
        return mVehicleHalEmulator;
    }

    private boolean waitForConnection(long timeoutMs) throws InterruptedException {
        return mConnectionWait.tryAcquire(timeoutMs, TimeUnit.MILLISECONDS);
    }
}