core/tests/overlaytests/remount/host/src/com/android/overlaytest/remounted/OverlaySharedLibraryTest.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.overlaytest.remounted;

import static org.junit.Assert.assertTrue;

import com.android.tradefed.device.DeviceNotAvailableException;
import com.android.tradefed.testtype.DeviceJUnit4ClassRunner;
import com.android.tradefed.testtype.junit4.BaseHostJUnit4Test;

import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.RuleChain;
import org.junit.rules.TemporaryFolder;
import org.junit.runner.RunWith;

@RunWith(DeviceJUnit4ClassRunner.class)
public class OverlaySharedLibraryTest extends BaseHostJUnit4Test {
    private static final String TARGET_APK = "OverlayRemountedTest_Target.apk";
    private static final String TARGET_PACKAGE = "com.android.overlaytest.remounted.target";
    private static final String SHARED_LIBRARY_APK =
            "OverlayRemountedTest_SharedLibrary.apk";
    private static final String SHARED_LIBRARY_PACKAGE =
            "com.android.overlaytest.remounted.shared_library";
    private static final String SHARED_LIBRARY_OVERLAY_APK =
            "OverlayRemountedTest_SharedLibraryOverlay.apk";
    private static final String SHARED_LIBRARY_OVERLAY_PACKAGE =
            "com.android.overlaytest.remounted.shared_library.overlay";

    public final TemporaryFolder temporaryFolder = new TemporaryFolder();
    public final SystemPreparer preparer = new SystemPreparer(temporaryFolder, this::getDevice);

    @Rule
    public final RuleChain ruleChain = RuleChain.outerRule(temporaryFolder).around(preparer);

    @Before
    public void startBefore() throws DeviceNotAvailableException {
        getDevice().waitForDeviceAvailable();
    }

    @Test
    public void testSharedLibrary() throws Exception {
        final String targetResource = resourceName(TARGET_PACKAGE, "bool",
                "uses_shared_library_overlaid");
        final String libraryResource = resourceName(SHARED_LIBRARY_PACKAGE, "bool",
                "shared_library_overlaid");

        preparer.pushResourceFile(SHARED_LIBRARY_APK, "/product/app/SharedLibrary.apk")
                .installResourceApk(SHARED_LIBRARY_OVERLAY_APK, SHARED_LIBRARY_OVERLAY_PACKAGE)
                .reboot()
                .setOverlayEnabled(SHARED_LIBRARY_OVERLAY_PACKAGE, false)
                .installResourceApk(TARGET_APK, TARGET_PACKAGE);

        // The shared library resource is not currently overlaid.
        assertResource(targetResource, "false");
        assertResource(libraryResource, "false");

        // Overlay the shared library resource.
        preparer.setOverlayEnabled(SHARED_LIBRARY_OVERLAY_PACKAGE, true);
        assertResource(targetResource, "true");
        assertResource(libraryResource, "true");
    }

    @Test
    public void testSharedLibraryPreEnabled() throws Exception {
        final String targetResource = resourceName(TARGET_PACKAGE, "bool",
                "uses_shared_library_overlaid");
        final String libraryResource = resourceName(SHARED_LIBRARY_PACKAGE, "bool",
                "shared_library_overlaid");

        preparer.pushResourceFile(SHARED_LIBRARY_APK, "/product/app/SharedLibrary.apk")
                .installResourceApk(SHARED_LIBRARY_OVERLAY_APK, SHARED_LIBRARY_OVERLAY_PACKAGE)
                .setOverlayEnabled(SHARED_LIBRARY_OVERLAY_PACKAGE, true)
                .reboot()
                .installResourceApk(TARGET_APK, TARGET_PACKAGE);

        assertResource(targetResource, "true");
        assertResource(libraryResource, "true");
    }

    /** Builds the full name of a resource in the form package:type/entry. */
    String resourceName(String pkg, String type, String entry) {
        return String.format("%s:%s/%s", pkg, type, entry);
    }

    void assertResource(String resourceName, String expectedValue)
            throws DeviceNotAvailableException {
        final String result = getDevice().executeShellCommand(
                String.format("cmd overlay lookup %s %s", TARGET_PACKAGE, resourceName));
        assertTrue(String.format("expected: <[%s]> in: <[%s]>", expectedValue, result),
                result.equals(expectedValue + "\n") ||
                result.endsWith("-> " + expectedValue + "\n"));
    }
}