[Testing] use AndroidJUnit4 in new MultiNetworkHeaderControllerTest

/*

 * 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 com.android.settings.network;

import static com.google.common.truth.Truth.assertThat;

import static org.mockito.Mockito.spy;

import static org.mockito.Mockito.when;

import android.content.Context;

import android.os.Looper;

import android.telephony.SubscriptionManager;

import androidx.preference.PreferenceCategory;

import androidx.preference.PreferenceManager;

import androidx.preference.PreferenceScreen;

import androidx.test.core.app.ApplicationProvider;

import androidx.test.ext.junit.runners.AndroidJUnit4;

import com.android.settings.wifi.WifiConnectionPreferenceController;

import com.android.settingslib.core.lifecycle.Lifecycle;

import org.junit.Assert;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.mockito.Mock;

import org.mockito.MockitoAnnotations;

@RunWith(AndroidJUnit4.class)

public class MultiNetworkHeaderControllerTest {

    private static final String KEY_HEADER = "multi_network_header";

    private static final int EXPANDED_CHILDREN_COUNT = 5;

    @Mock

    private PreferenceCategory mPreferenceCategory;

    @Mock

    private WifiConnectionPreferenceController mWifiController;

    @Mock

    private SubscriptionsPreferenceController mSubscriptionsController;

    @Mock

    private SubscriptionManager mSubscriptionManager;

    @Mock

    private Lifecycle mLifecycle;

    private Context mContext;

    private PreferenceManager mPreferenceManager;

    private PreferenceScreen mPreferenceScreen;

    private MultiNetworkHeaderController mHeaderController;

    @Before

    public void setUp() {

        MockitoAnnotations.initMocks(this);

        mContext = spy(ApplicationProvider.getApplicationContext());

        when(mContext.getSystemService(SubscriptionManager.class)).thenReturn(mSubscriptionManager);

        mHeaderController = new MultiNetworkHeaderController(mContext, KEY_HEADER) {

            @Override

            WifiConnectionPreferenceController createWifiController(Lifecycle lifecycle) {

                return mWifiController;

            }

            @Override

            SubscriptionsPreferenceController createSubscriptionsController(Lifecycle lifecycle) {

                return mSubscriptionsController;

            }

        };

        if (Looper.myLooper() == null) {

            Looper.prepare();

        }

        mPreferenceManager = new PreferenceManager(mContext);

        mPreferenceScreen = mPreferenceManager.createPreferenceScreen(mContext);

        mPreferenceScreen.setInitialExpandedChildrenCount(EXPANDED_CHILDREN_COUNT);

        when(mPreferenceCategory.getKey()).thenReturn(KEY_HEADER);

        when(mPreferenceCategory.getPreferenceCount()).thenReturn(3);

        mPreferenceScreen.addPreference(mPreferenceCategory);

    }

    @Test

    public void isAvailable_beforeInitIsCalled_notAvailable() {

        assertThat(mHeaderController.isAvailable()).isFalse();

    }

    // When calling displayPreference, the header itself should only be visible if the

    // subscriptions controller says it is available. This is a helper for test cases of this logic.

    private void displayPreferenceTest(boolean wifiAvailable, boolean subscriptionsAvailable,

            boolean setVisibleExpectedValue) {

        when(mWifiController.isAvailable()).thenReturn(wifiAvailable);

        when(mSubscriptionsController.isAvailable()).thenReturn(subscriptionsAvailable);

        mHeaderController.init(mLifecycle);

        mHeaderController.displayPreference(mPreferenceScreen);

        Assert.assertEquals(mPreferenceCategory.isVisible(), setVisibleExpectedValue);

    }

    @Test

    public void displayPreference_bothNotAvailable_categoryIsNotVisible() {

        displayPreferenceTest(false, false, false);

    }

    @Test

    public void displayPreference_wifiAvailableButNotSubscriptions_categoryIsNotVisible() {

        displayPreferenceTest(true, false, false);

    }

    @Test

    public void displayPreference_subscriptionsAvailableButNotWifi_categoryIsVisible() {

        displayPreferenceTest(false, true, true);

    }

    @Test

    public void displayPreference_bothAvailable_categoryIsVisible() {

        displayPreferenceTest(true, true, true);

    }

    @Test

    public void onChildUpdated_subscriptionsBecameAvailable_categoryIsVisible() {

        when(mSubscriptionsController.isAvailable()).thenReturn(false);

        mHeaderController.init(mLifecycle);

        mHeaderController.displayPreference(mPreferenceScreen);

        when(mSubscriptionsController.isAvailable()).thenReturn(true);

        mHeaderController.onChildrenUpdated();

        Assert.assertTrue(mPreferenceCategory.isVisible());

        assertThat(mPreferenceScreen.getInitialExpandedChildrenCount()).isEqualTo(

                EXPANDED_CHILDREN_COUNT + mPreferenceCategory.getPreferenceCount());

    }

    @Test

    public void onChildUpdated_subscriptionsBecameUnavailable_categoryIsNotVisible() {

        when(mSubscriptionsController.isAvailable()).thenReturn(true);

        mHeaderController.init(mLifecycle);

        mHeaderController.displayPreference(mPreferenceScreen);

        when(mSubscriptionsController.isAvailable()).thenReturn(false);

        mHeaderController.onChildrenUpdated();

        Assert.assertFalse(mPreferenceCategory.isVisible());

        assertThat(mPreferenceScreen.getInitialExpandedChildrenCount()).isEqualTo(

                EXPANDED_CHILDREN_COUNT);

    }

    @Test

    public void onChildUpdated_noExpandedChildCountAndAvailable_doesNotSetExpandedCount() {

        mPreferenceScreen.setInitialExpandedChildrenCount(Integer.MAX_VALUE);

        when(mSubscriptionsController.isAvailable()).thenReturn(false);

        mHeaderController.init(mLifecycle);

        mHeaderController.displayPreference(mPreferenceScreen);

        when(mSubscriptionsController.isAvailable()).thenReturn(true);

        mHeaderController.onChildrenUpdated();

        // Check that setInitialExpandedChildrenCount was never called.

        Assert.assertEquals(mPreferenceScreen.getInitialExpandedChildrenCount(), Integer.MAX_VALUE);

    }

}