tests/net/java/com/android/server/connectivity/TetheringTest.java

/*
 * Copyright (C) 2016 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.connectivity;

import static org.junit.Assert.assertTrue;
import static org.mockito.Matchers.anyBoolean;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.when;

import android.content.Context;
import android.content.res.Resources;
import android.net.INetworkPolicyManager;
import android.net.INetworkStatsService;
import android.os.INetworkManagementService;
import android.os.PersistableBundle;
import android.os.test.TestLooper;
import android.support.test.filters.SmallTest;
import android.support.test.runner.AndroidJUnit4;
import android.telephony.CarrierConfigManager;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

@RunWith(AndroidJUnit4.class)
@SmallTest
public class TetheringTest {
    private static final String[] PROVISIONING_APP_NAME = {"some", "app"};

    @Mock private Context mContext;
    @Mock private INetworkManagementService mNMService;
    @Mock private INetworkStatsService mStatsService;
    @Mock private INetworkPolicyManager mPolicyManager;
    @Mock private MockableSystemProperties mSystemProperties;
    @Mock private Resources mResources;
    @Mock private CarrierConfigManager mCarrierConfigManager;

    // Like so many Android system APIs, these cannot be mocked because it is marked final.
    // We have to use the real versions.
    private final PersistableBundle mCarrierConfig = new PersistableBundle();
    private final TestLooper mLooper = new TestLooper();

    private Tethering mTethering;

    @Before public void setUp() throws Exception {
        MockitoAnnotations.initMocks(this);
        when(mContext.getResources()).thenReturn(mResources);
        when(mResources.getStringArray(com.android.internal.R.array.config_tether_dhcp_range))
                .thenReturn(new String[0]);
        when(mResources.getStringArray(com.android.internal.R.array.config_tether_usb_regexs))
                .thenReturn(new String[0]);
        when(mResources.getStringArray(com.android.internal.R.array.config_tether_wifi_regexs))
                .thenReturn(new String[0]);
        when(mResources.getStringArray(com.android.internal.R.array.config_tether_bluetooth_regexs))
                .thenReturn(new String[0]);
        when(mResources.getIntArray(com.android.internal.R.array.config_tether_upstream_types))
                .thenReturn(new int[0]);
        mTethering = new Tethering(mContext, mNMService, mStatsService, mPolicyManager,
                                   mLooper.getLooper(), mSystemProperties);
    }

    private void setupForRequiredProvisioning() {
        // Produce some acceptable looking provision app setting if requested.
        when(mResources.getStringArray(
                com.android.internal.R.array.config_mobile_hotspot_provision_app))
                .thenReturn(PROVISIONING_APP_NAME);
        // Don't disable tethering provisioning unless requested.
        when(mSystemProperties.getBoolean(eq(Tethering.DISABLE_PROVISIONING_SYSPROP_KEY),
                                          anyBoolean())).thenReturn(false);
        // Act like the CarrierConfigManager is present and ready unless told otherwise.
        when(mContext.getSystemService(Context.CARRIER_CONFIG_SERVICE))
                .thenReturn(mCarrierConfigManager);
        when(mCarrierConfigManager.getConfig()).thenReturn(mCarrierConfig);
        mCarrierConfig.putBoolean(CarrierConfigManager.KEY_REQUIRE_ENTITLEMENT_CHECKS_BOOL, true);
    }

    @Test
    public void canRequireProvisioning() {
        setupForRequiredProvisioning();
        assertTrue(mTethering.isTetherProvisioningRequired());
    }

    @Test
    public void toleratesCarrierConfigManagerMissing() {
        setupForRequiredProvisioning();
        when(mContext.getSystemService(Context.CARRIER_CONFIG_SERVICE))
                .thenReturn(null);
        // Couldn't get the CarrierConfigManager, but still had a declared provisioning app.
        // We therefore still require provisioning.
        assertTrue(mTethering.isTetherProvisioningRequired());
    }

    @Test
    public void toleratesCarrierConfigMissing() {
        setupForRequiredProvisioning();
        when(mCarrierConfigManager.getConfig()).thenReturn(null);
        // We still have a provisioning app configured, so still require provisioning.
        assertTrue(mTethering.isTetherProvisioningRequired());
    }

    @Test
    public void provisioningNotRequiredWhenAppNotFound() {
        setupForRequiredProvisioning();
        when(mResources.getStringArray(
                com.android.internal.R.array.config_mobile_hotspot_provision_app))
                .thenReturn(null);
        assertTrue(!mTethering.isTetherProvisioningRequired());
        when(mResources.getStringArray(
                com.android.internal.R.array.config_mobile_hotspot_provision_app))
                .thenReturn(new String[] {"malformedApp"});
        assertTrue(!mTethering.isTetherProvisioningRequired());
    }
}