Unit tests for ListenableHostView

/*

 * Copyright (C) 2024 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

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package com.android.launcher3.widget

import android.content.Context

import android.view.accessibility.AccessibilityNodeInfo

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

import androidx.test.filters.SmallTest

import androidx.test.platform.app.InstrumentationRegistry

import com.android.launcher3.util.ActivityContextWrapper

import com.google.common.truth.Truth

import org.junit.Test

import org.junit.runner.RunWith

@SmallTest

@RunWith(AndroidJUnit4::class)

class ListenableHostViewTest {

    private val context: Context

        get() = ActivityContextWrapper(InstrumentationRegistry.getInstrumentation().targetContext)

    @Test

    fun updateAppWidget_notifiesListeners() {

        val hostView = ListenableHostView(context)

        var wasNotifiedOfUpdate = false

        val updateListener = Runnable { wasNotifiedOfUpdate = true }

        hostView.addUpdateListener(updateListener)

        hostView.beginDeferringUpdates()

        hostView.updateAppWidget(null)

        Truth.assertThat(wasNotifiedOfUpdate).isTrue()

    }

    @Test

    fun onInitializeAccessibilityNodeInfo_correctlySetsClassName() {

        val hostView = ListenableHostView(context)

        val nodeInfo = AccessibilityNodeInfo()

        hostView.onInitializeAccessibilityNodeInfo(nodeInfo)

        Truth.assertThat(nodeInfo.className).isEqualTo(LauncherAppWidgetHostView::class.java.name)

    }

}