[Home Controls] Add null safety to comparator.

            backgroundExecutor.execute {

                val collator = Collator.getInstance(resources.configuration.locales[0])

                val localeComparator = compareBy<ControlsServiceInfo, CharSequence>(collator) {

                    it.loadLabel()

                    it.loadLabel() ?: ""

                }

                listOfServices = serviceInfos.sortedWith(localeComparator)

                uiExecutor.execute(::notifyDataSetChanged)

/*

 * Copyright (C) 2022 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.systemui.controls.management

import android.content.ComponentName

import android.content.res.Resources

import android.testing.AndroidTestingRunner

import android.testing.TestableLooper

import android.view.LayoutInflater

import androidx.test.filters.SmallTest

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

import com.android.systemui.SysuiTestCase

import com.android.systemui.controls.ControlsServiceInfo

import com.android.systemui.util.concurrency.FakeExecutor

import com.android.systemui.util.mockito.any

import com.android.systemui.util.time.FakeSystemClock

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

import org.junit.Before

import org.junit.Test

import org.junit.runner.RunWith

import org.mockito.ArgumentCaptor

import org.mockito.Mock

import org.mockito.Mockito.mock

import org.mockito.Mockito.verify

import org.mockito.Mockito.`when`

import org.mockito.MockitoAnnotations

@SmallTest

@RunWith(AndroidTestingRunner::class)

@TestableLooper.RunWithLooper(setAsMainLooper = true)

class AppAdapterTest : SysuiTestCase() {

    private val fakeSystemClock = FakeSystemClock()

    private val backgroundExecutor = FakeExecutor(fakeSystemClock)

    private val uiExecutor = FakeExecutor(fakeSystemClock)

    @Mock lateinit var lifecycle: Lifecycle

    @Mock lateinit var controlsListingController: ControlsListingController

    @Mock lateinit var layoutInflater: LayoutInflater

    @Mock lateinit var onAppSelected: (ComponentName?) -> Unit

    @Mock lateinit var favoritesRenderer: FavoritesRenderer

    val resources: Resources = context.resources

    lateinit var adapter: AppAdapter

    @Before

    fun setUp() {

        MockitoAnnotations.initMocks(this)

        adapter = AppAdapter(backgroundExecutor,

            uiExecutor,

            lifecycle,

            controlsListingController,

            layoutInflater,

            onAppSelected,

            favoritesRenderer,

            resources)

    }

    @Test

    fun testOnServicesUpdated_nullLoadLabel() {

        val captor = ArgumentCaptor

            .forClass(ControlsListingController.ControlsListingCallback::class.java)

        val controlsServiceInfo = mock(ControlsServiceInfo::class.java)

        val serviceInfo = listOf(controlsServiceInfo)

        `when`(controlsServiceInfo.loadLabel()).thenReturn(null)

        verify(controlsListingController).observe(any(Lifecycle::class.java), captor.capture())

        captor.value.onServicesUpdated(serviceInfo)

        backgroundExecutor.runAllReady()

        uiExecutor.runAllReady()

        assertThat(adapter.itemCount).isEqualTo(serviceInfo.size)

    }

}