hostsidetests/security/src/android/security/cts/SecurityTestCase.java

/*
 * Copyright (C) 2016 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 android.security.cts;

import com.android.tradefed.device.DeviceNotAvailableException;
import com.android.tradefed.device.ITestDevice;
import com.android.tradefed.device.NativeDevice;
import com.android.tradefed.testtype.DeviceTestCase;

public class SecurityTestCase extends DeviceTestCase {

    private long kernelStartTime;

    /**
     * Waits for device to be online, marks the most recent boottime of the device
     */
    @Override
    public void setUp() throws Exception {
        super.setUp();

        kernelStartTime = System.currentTimeMillis()/1000 -
            Integer.parseInt(getDevice().executeShellCommand("cut -f1 -d. /proc/uptime").trim());
        //TODO:(badash@): Watch for other things to track.
        //     Specifically time when app framework starts
    }

    /**
     * Use {@link NativeDevice#enableAdbRoot()} internally.
     */
    public void enableAdbRoot(ITestDevice mDevice) throws DeviceNotAvailableException {
        mDevice.enableAdbRoot();
    }

    /**
     * Check if a driver is present on a machine
     */
    public boolean containsDriver(ITestDevice mDevice, String driver) throws Exception {
        String result = mDevice.executeShellCommand("ls -Zl " + driver);
        if(result.contains("No such file or directory")) {
            return false;
        }
        return true;
    }

    /**
     * Makes sure the phone is online, and the ensure the current boottime is within 2 seconds
     * (due to rounding) of the previous boottime to check if The phone has crashed.
     */
    @Override
    public void tearDown() throws Exception {
        getDevice().waitForDeviceOnline(60 * 1000);
        assertTrue("Phone has had a hard reset",
            (System.currentTimeMillis()/1000 -
                Integer.parseInt(getDevice().executeShellCommand("cut -f1 -d. /proc/uptime").trim())
                    - kernelStartTime < 2));
        //TODO(badash@): add ability to catch runtime restart
        getDevice().disableAdbRoot();
    }
}