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/*
* Copyright (C) 2023 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.cuttlefish.tests;
import static org.junit.Assert.assertTrue;
import com.android.tradefed.config.Option;
import com.android.tradefed.device.DeviceNotAvailableException;
import com.android.tradefed.device.internal.DeviceSnapshotHandler;
import com.android.tradefed.log.LogUtil.CLog;
import com.android.tradefed.testtype.DeviceJUnit4ClassRunner;
import com.android.tradefed.testtype.junit4.BaseHostJUnit4Test;
import java.io.File;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
/**
* Test snapshot/restore function.
*
* <p>* This test resets the device thus it should not run with other tests in the same test suite
* to avoid unexpected behavior.
*
* <p>* The test logic relies on cvd and snapshot_util_cvd tools, so it can only run in a test lab
* setup.
*/
@RunWith(DeviceJUnit4ClassRunner.class)
public class SnapshotTest extends BaseHostJUnit4Test {
@Option(
name = "test-count",
description = "Number of times to restore the device back to snapshot state.")
private int mTestCount = 1;
@Test
public void testSnapshot() throws Exception {
// Snapshot the device
boolean snapshotRes = false;
snapshotRes =
new DeviceSnapshotHandler()
.snapshotDevice(getDevice(), String.format("snapshot_img%d", mTestCount));
if (!snapshotRes) {
Assert.fail("failed to snapshot.");
}
// Create a file in tmp directory
final String tmpFile = "/data/local/tmp/snapshot_tmp";
getDevice().executeShellCommand("touch " + tmpFile);
// Reboot the device to make sure the file persits.
getDevice().reboot();
File file = getDevice().pullFile(tmpFile);
if (file == null) {
Assert.fail("Setup failed: tmp file failed to persist after device reboot.");
}
long startAllRuns = System.currentTimeMillis();
for (int i = 0; i < mTestCount; i++) {
CLog.d("Restore snapshot attempt #%d", i);
long start = System.currentTimeMillis();
// We don't usually expect tests to use our feature server, but in this case we are
// validating the feature itself so it's fine
boolean restoreRes = false;
try {
restoreRes =
new DeviceSnapshotHandler()
.restoreSnapshotDevice(
getDevice(), String.format("snapshot_img%d", mTestCount));
} catch (DeviceNotAvailableException e) {
CLog.e(e);
}
assertTrue(
String.format("Restore snapshot for device reset failed during attempt #%d", i), restoreRes);
long duration = System.currentTimeMillis() - start;
CLog.d("Restore snapshot took %dms to finish", duration);
}
CLog.d(
"%d Restore snapshot runs finished successfully, with average time of %dms",
mTestCount, (System.currentTimeMillis() - startAllRuns) / mTestCount);
// Verify that the device is back online and pre-existing file is gone.
file = getDevice().pullFile(tmpFile);
if (file != null) {
Assert.fail("Restore snapshot failed: pre-existing file still exists.");
}
}
// Make sure reboots work correctly after a restore.
//
// There is some overlap between the cuttleifsh's support for restore and
// reboot and so it can be easy for change to one to break the other.
@Test
public void testSnapshotReboot() throws Exception {
// Snapshot the device>
boolean snapshotRes =
new DeviceSnapshotHandler().snapshotDevice(getDevice(), "snapshot_img");
assertTrue("failed to snapshot", snapshotRes);
// Restore the device.
boolean restoreRes =
new DeviceSnapshotHandler().restoreSnapshotDevice(getDevice(), "snapshot_img");
assertTrue("Restore snapshot for device reset failed", restoreRes);
// Reboot the device.
getDevice().reboot();
// Verify that the device is back online.
getDevice().executeShellCommand("echo test");
}
}
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