tests/src/com/android/tests/apex/MediaHostTest.java

/*
 * Copyright (C) 2019 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.tests.apex;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import com.android.tradefed.device.DeviceNotAvailableException;
import com.android.tradefed.testtype.DeviceJUnit4ClassRunner;
import com.android.tradefed.util.CommandResult;

import com.google.common.truth.Truth;

import org.junit.runner.RunWith;

import java.io.File;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Test to check if Apex can be staged, activated and uninstalled successfully.
 */
@RunWith(DeviceJUnit4ClassRunner.class)
public class MediaHostTest extends ApexE2EBaseHostTest {
    // Pattern for extractor info in dumpsys media.extractor. e.g.:
    // AAC Extractor: plugin_version(3), uuid(4fd80eae03d24d729eb948fa6bb54613), \
    // version(1), path(/apex/com.android.media/lib/extractors/libaacextractor.so), \
    // supports: aac
    private static final Pattern EXTRACTOR_PLUGIN_REGEX =
            Pattern.compile("\\s+(.*): plugin_version\\((\\d+)\\), uuid\\((.+)\\)"
                    + ", version\\((\\d+)\\), path\\((.+)\\), supports: (.*)");
    private static final int DEFAULT_EXTRACTOR_PLUGIN_COUNT = 10;
    private static final String MEDIA_APEX_PATH = "/apex/com.android.media";
    // NOTE: This size cap is strict as this artifact is pinned to memory on
    // various devices running Q, R, and S. Until such devices no longer receive
    // mainline media updates, please avoid increasing. See also b/214499288.
    private static final int UPDATABLE_MEDIA_JAR_SIZE_CAP = 800000;

    @Override
    public void additionalCheck() throws DeviceNotAvailableException {
        checkMediaExtractor();
        checkUpdatableMediaJarSize();
    }

    private void checkMediaExtractor() throws DeviceNotAvailableException {
        CommandResult commandResult =
                getDevice().executeShellV2Command("dumpsys media.extractor");
        assertEquals(0, (int) commandResult.getExitCode());

        String outputString = commandResult.getStdout();
        Scanner in = new Scanner(outputString);
        int extractorCount = 0;
        while (in.hasNextLine()) {
            String line = in.nextLine();
            Matcher m = EXTRACTOR_PLUGIN_REGEX.matcher(line);
            if (m.matches()) {
                assertTrue("Plugin path does not start with " + MEDIA_APEX_PATH
                        + ". dumpsys output: " + line,
                        m.group(5).startsWith(MEDIA_APEX_PATH));
                extractorCount++;
            }
        }
        assertTrue("Failed to find enough plug-ins. expected: " + DEFAULT_EXTRACTOR_PLUGIN_COUNT
                + " actual: " + extractorCount + " dumpsys output: " + outputString,
                DEFAULT_EXTRACTOR_PLUGIN_COUNT <= extractorCount);
    }

    private void checkUpdatableMediaJarSize() throws DeviceNotAvailableException {
        File updatableMediaJar = getDevice().pullFile(
                MEDIA_APEX_PATH + "/javalib/updatable-media.jar");
        Truth.assertThat(updatableMediaJar.length()).isAtMost(UPDATABLE_MEDIA_JAR_SIZE_CAP);
    }
}