Merge "Add compatibility mode test" into sc-dev

/*

 * Copyright (C) 2021 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.server.pm;

import static android.content.pm.ApplicationInfo.FLAG_RESIZEABLE_FOR_SCREENS;

import static android.content.pm.ApplicationInfo.FLAG_SUPPORTS_LARGE_SCREENS;

import static android.content.pm.ApplicationInfo.FLAG_SUPPORTS_NORMAL_SCREENS;

import static android.content.pm.ApplicationInfo.FLAG_SUPPORTS_SCREEN_DENSITIES;

import static android.content.pm.ApplicationInfo.FLAG_SUPPORTS_SMALL_SCREENS;

import static android.content.pm.ApplicationInfo.FLAG_SUPPORTS_XLARGE_SCREENS;

import static org.hamcrest.CoreMatchers.is;

import static org.hamcrest.MatcherAssert.assertThat;

import static org.mockito.ArgumentMatchers.anyInt;

import static org.mockito.Mockito.mock;

import static org.mockito.Mockito.when;

import android.content.pm.ApplicationInfo;

import android.content.pm.PackageParser;

import android.content.pm.PackageUserState;

import android.content.pm.parsing.PackageInfoWithoutStateUtils;

import android.os.Build;

import com.android.server.pm.parsing.pkg.AndroidPackage;

import org.junit.After;

import org.junit.Before;

import org.junit.Test;

public class CompatibilityModeTest {

    private boolean mCompatibilityModeEnabled;;

    private AndroidPackage mMockAndroidPackage;

    private PackageUserState mMockUserState;

    @Before

    public void setUp() {

        mCompatibilityModeEnabled = PackageParser.sCompatibilityModeEnabled;

        mMockAndroidPackage = mock(AndroidPackage.class);

        mMockUserState = mock(PackageUserState.class);

        mMockUserState.installed = true;

        when(mMockUserState.isAvailable(anyInt())).thenReturn(true);

        when(mMockUserState.getAllOverlayPaths()).thenReturn(null);

    }

    @After

    public void tearDown() {

        setGlobalCompatibilityMode(mCompatibilityModeEnabled);

    }

    // The following tests ensure that apps with target SDK of Cupcake always use compat mode.

    @Test

    public void testGlobalCompatModeEnabled_oldApp_supportAllScreens_usesCompatMode() {

        setGlobalCompatibilityMode(true);

        final int flags = (FLAG_SUPPORTS_LARGE_SCREENS | FLAG_SUPPORTS_NORMAL_SCREENS

                | FLAG_SUPPORTS_SMALL_SCREENS | FLAG_RESIZEABLE_FOR_SCREENS

                | FLAG_SUPPORTS_SCREEN_DENSITIES | FLAG_SUPPORTS_XLARGE_SCREENS);

        final ApplicationInfo info =

                generateMockApplicationInfo(Build.VERSION_CODES.CUPCAKE, flags);

        assertThat(info.usesCompatibilityMode(), is(true));

    }

    @Test

    public void testGlobalCompatModeEnabled_oldApp_supportSomeScreens_usesCompatMode() {

        setGlobalCompatibilityMode(true);

        final int flags = (FLAG_SUPPORTS_LARGE_SCREENS

                | FLAG_SUPPORTS_SMALL_SCREENS | FLAG_RESIZEABLE_FOR_SCREENS

                | FLAG_SUPPORTS_SCREEN_DENSITIES | FLAG_SUPPORTS_XLARGE_SCREENS);

        final ApplicationInfo info =

                generateMockApplicationInfo(Build.VERSION_CODES.CUPCAKE, flags);

        assertThat(info.usesCompatibilityMode(), is(true));

    }

    @Test

    public void testGlobalCompatModeEnabled_oldApp_supportOnlyOneScreen_usesCompatMode() {

        setGlobalCompatibilityMode(true);

        final int flags = FLAG_SUPPORTS_NORMAL_SCREENS;

        final ApplicationInfo info =

                generateMockApplicationInfo(Build.VERSION_CODES.CUPCAKE, flags);

        assertThat(info.usesCompatibilityMode(), is(true));

    }

    @Test

    public void testGlobalCompatModeEnabled_oldApp_DoesntSupportAllScreens_usesCompatMode() {

        setGlobalCompatibilityMode(true);

        final ApplicationInfo info =

                generateMockApplicationInfo(Build.VERSION_CODES.CUPCAKE, 0 /*flags*/);

        assertThat(info.usesCompatibilityMode(), is(true));

    }

    @Test

    public void testGlobalCompatModeDisabled_oldApp_supportAllScreens_usesCompatMode() {

        setGlobalCompatibilityMode(false);

        final int flags = (FLAG_SUPPORTS_LARGE_SCREENS | FLAG_SUPPORTS_NORMAL_SCREENS

                | FLAG_SUPPORTS_SMALL_SCREENS | FLAG_RESIZEABLE_FOR_SCREENS

                | FLAG_SUPPORTS_SCREEN_DENSITIES | FLAG_SUPPORTS_XLARGE_SCREENS);

        final ApplicationInfo info =

                generateMockApplicationInfo(Build.VERSION_CODES.CUPCAKE, flags);

        assertThat(info.usesCompatibilityMode(), is(true));

    }

    @Test

    public void testGlobalCompatModeDisabled_oldApp_supportSomeScreens_usesCompatMode() {

        setGlobalCompatibilityMode(false);

        final int flags = (FLAG_SUPPORTS_LARGE_SCREENS

                | FLAG_SUPPORTS_SMALL_SCREENS | FLAG_RESIZEABLE_FOR_SCREENS

                | FLAG_SUPPORTS_SCREEN_DENSITIES | FLAG_SUPPORTS_XLARGE_SCREENS);

        final ApplicationInfo info =

                generateMockApplicationInfo(Build.VERSION_CODES.CUPCAKE, flags);

        assertThat(info.usesCompatibilityMode(), is(true));

    }

    @Test

    public void testGlobalCompatModeDisabled_oldApp_supportOnlyOneScreen_usesCompatMode() {

        setGlobalCompatibilityMode(false);

        final int flags = FLAG_SUPPORTS_NORMAL_SCREENS;

        final ApplicationInfo info =

                generateMockApplicationInfo(Build.VERSION_CODES.CUPCAKE, flags);

        assertThat(info.usesCompatibilityMode(), is(true));

    }

    @Test

    public void testGlobalCompatModeDisabled_oldApp_doesntSupportAllScreens_usesCompatMode() {

        setGlobalCompatibilityMode(false);

        final ApplicationInfo info =

                generateMockApplicationInfo(Build.VERSION_CODES.CUPCAKE, 0 /*flags*/);

        assertThat(info.usesCompatibilityMode(), is(true));

    }

    // The following tests ensure that apps with newer target SDK use compat mode as expected.

    @Test

    public void testGlobalCompatModeEnabled_newApp_supportAllScreens_doesntUseCompatMode() {

        setGlobalCompatibilityMode(true);

        final int flags = (FLAG_SUPPORTS_LARGE_SCREENS | FLAG_SUPPORTS_NORMAL_SCREENS

                | FLAG_SUPPORTS_SMALL_SCREENS | FLAG_RESIZEABLE_FOR_SCREENS

                | FLAG_SUPPORTS_SCREEN_DENSITIES | FLAG_SUPPORTS_XLARGE_SCREENS);

        final ApplicationInfo info = generateMockApplicationInfo(Build.VERSION_CODES.DONUT, flags);

        assertThat(info.usesCompatibilityMode(), is(false));

    }

    @Test

    public void testGlobalCompatModeEnabled_newApp_supportSomeScreens_doesntUseCompatMode() {

        setGlobalCompatibilityMode(true);

        final int flags = (FLAG_SUPPORTS_LARGE_SCREENS

                | FLAG_SUPPORTS_SMALL_SCREENS | FLAG_RESIZEABLE_FOR_SCREENS

                | FLAG_SUPPORTS_SCREEN_DENSITIES | FLAG_SUPPORTS_XLARGE_SCREENS);

        final ApplicationInfo info = generateMockApplicationInfo(Build.VERSION_CODES.DONUT, flags);

        assertThat(info.usesCompatibilityMode(), is(false));

    }

    @Test

    public void testGlobalCompatModeEnabled_newApp_supportOnlyOneScreen_doesntUseCompatMode() {

        setGlobalCompatibilityMode(true);

        final int flags = FLAG_SUPPORTS_NORMAL_SCREENS;

        final ApplicationInfo info = generateMockApplicationInfo(Build.VERSION_CODES.DONUT, flags);

        assertThat(info.usesCompatibilityMode(), is(false));

    }

    @Test

    public void testGlobalCompatModeEnabled_newApp_doesntSupportAllScreens_usesCompatMode() {

        setGlobalCompatibilityMode(true);

        final ApplicationInfo info =

                generateMockApplicationInfo(Build.VERSION_CODES.DONUT, 0 /*flags*/);

        assertThat(info.usesCompatibilityMode(), is(true));

    }

    @Test

    public void testGlobalCompatModeDisabled_newApp_supportAllScreens_doesntUseCompatMode() {

        setGlobalCompatibilityMode(false);

        final int flags = (FLAG_SUPPORTS_LARGE_SCREENS | FLAG_SUPPORTS_NORMAL_SCREENS

                | FLAG_SUPPORTS_SMALL_SCREENS | FLAG_RESIZEABLE_FOR_SCREENS

                | FLAG_SUPPORTS_SCREEN_DENSITIES | FLAG_SUPPORTS_XLARGE_SCREENS);

        final ApplicationInfo info = generateMockApplicationInfo(Build.VERSION_CODES.DONUT, flags);

        assertThat(info.usesCompatibilityMode(), is(false));

    }

    @Test

    public void testGlobalCompatModeDisabled_newApp_supportSomeScreens_doesntUseCompatMode() {

        setGlobalCompatibilityMode(false);

        final int flags = (FLAG_SUPPORTS_LARGE_SCREENS

                | FLAG_SUPPORTS_SMALL_SCREENS | FLAG_RESIZEABLE_FOR_SCREENS

                | FLAG_SUPPORTS_SCREEN_DENSITIES | FLAG_SUPPORTS_XLARGE_SCREENS);

        final ApplicationInfo info = generateMockApplicationInfo(Build.VERSION_CODES.DONUT, flags);

        assertThat(info.usesCompatibilityMode(), is(false));

    }

    @Test

    public void testGlobalCompatModeDisabled_newApp_supportOnlyOneScreen_doesntUseCompatMode() {

        setGlobalCompatibilityMode(false);

        final int flags = FLAG_SUPPORTS_NORMAL_SCREENS;

        final ApplicationInfo info = generateMockApplicationInfo(Build.VERSION_CODES.DONUT, flags);

        assertThat(info.usesCompatibilityMode(), is(false));

    }

    @Test

    public void testGlobalCompatModeDisabled_newApp_doesntSupportAllScreens_doesntUseCompatMode() {

        setGlobalCompatibilityMode(false);

        final ApplicationInfo info =

                generateMockApplicationInfo(Build.VERSION_CODES.DONUT, 0 /*flags*/);

        assertThat(info.usesCompatibilityMode(), is(false));

    }

    private ApplicationInfo generateMockApplicationInfo(int targetSdkVersion, int flags) {

        final ApplicationInfo info = new ApplicationInfo();

        info.targetSdkVersion = targetSdkVersion;

        info.flags |= flags;

        when(mMockAndroidPackage.toAppInfoWithoutState()).thenReturn(info);

        return PackageInfoWithoutStateUtils.generateApplicationInfoUnchecked(mMockAndroidPackage,

                0 /*flags*/, mMockUserState, 0 /*userId*/, false /*assignUserFields*/);

    }

    private void setGlobalCompatibilityMode(boolean enabled) {

        if (PackageParser.sCompatibilityModeEnabled == enabled) {

            return;

        }

        PackageParser.setCompatibilityModeEnabled(enabled);

    }

}