hostsidetests/os/src/android/os/cts/EnvironmentHostTests.java

/*
 * Copyright (C) 2020 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.os.cts;

import static org.junit.Assert.assertTrue;

import android.platform.test.annotations.AppModeFull;

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

import org.junit.Test;
import org.junit.runner.RunWith;

/**
 * Runs the host side tests for Environment.java
 */
@RunWith(DeviceJUnit4ClassRunner.class)
@AppModeFull
public class EnvironmentHostTests extends BaseHostJUnit4Test {

    private static final String MANAGE_EXTERNAL_STORAGE_APP_OP = "android:manage_external_storage";

    /**
     * Runs the given phase of Test by calling into the device.
     * Throws an exception if the test phase fails.
     */
    private void runDeviceTest(String phase) throws Exception {
        assertTrue(runDeviceTests("android.cts.environment",
                "android.cts.environment.EnvironmentTest", phase));
    }

    private String executeShellCommand(String cmd) throws Exception {
        return getDevice().executeShellCommand(cmd);
    }

    private void setAppOp(String appOp, boolean val) throws Exception {
        executeShellCommand("cmd appops set --uid android.cts.environment "
                + appOp + (val ? " allow" : " deny"));
    }

    @Test
    public void testIsExternalStorageManager() throws Exception {
        // By default, this test app is not an external storage manager
        runDeviceTest("testIsExternalStorageManagerFalse");
        try {
            setAppOp(MANAGE_EXTERNAL_STORAGE_APP_OP, true);
            runDeviceTest("testIsExternalStorageManagerTrue");
        } finally {
            setAppOp(MANAGE_EXTERNAL_STORAGE_APP_OP, false);
        }
    }
}