Make AppListPage testable

Users could now overwrite AppListPage's appList param to replace the
real implementation with fake for testing.

Bug: 260660819
Test: Unit test
Change-Id: Ia25fecf6d98f7ed18de020f855b9cd31a7199217

packages/SettingsLib/Spa/testutils/Android.bp

@@ -24,7 +24,9 @@ android_library {
     srcs: ["src/**/*.kt"],
 
     static_libs: [
+        "SpaLib",
         "androidx.arch.core_core-testing",
+        "androidx.compose.runtime_runtime",
         "androidx.compose.ui_ui-test-junit4",
         "androidx.compose.ui_ui-test-manifest",
         "mockito",

packages/SettingsLib/Spa/testutils/build.gradle

@@ -44,9 +44,17 @@ android {
         jvmTarget = '1.8'
         freeCompilerArgs = ["-Xjvm-default=all"]
     }
+    buildFeatures {
+        compose true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion jetpack_compose_compiler_version
+    }
 }
 
 dependencies {
+    api project(":SpaLib")
+
     api "androidx.arch.core:core-testing:2.1.0"
     api "androidx.compose.ui:ui-test-junit4:$jetpack_compose_version"
     api "com.google.truth:truth:1.1.3"

packages/SettingsLib/Spa/testutils/src/com/android/settingslib/spa/testutils/FakeNavControllerWrapper.kt

@@ -0,0 +1,42 @@
+/*
+ * 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.settingslib.spa.testutils
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
+import com.android.settingslib.spa.framework.compose.LocalNavController
+import com.android.settingslib.spa.framework.compose.NavControllerWrapper
+
+class FakeNavControllerWrapper : NavControllerWrapper {
+    var navigateCalledWith: String? = null
+    var navigateBackIsCalled = false
+
+    override fun navigate(route: String) {
+        navigateCalledWith = route
+    }
+
+    override fun navigateBack() {
+        navigateBackIsCalled = true
+    }
+
+    @Composable
+    fun Wrapper(content: @Composable () -> Unit) {
+        CompositionLocalProvider(LocalNavController provides this) {
+            content()
+        }
+    }
+}

packages/SettingsLib/SpaPrivileged/src/com/android/settingslib/spaprivileged/model/app/AppListRepository.kt

@@ -29,7 +29,7 @@ import kotlinx.coroutines.flow.combine
 /**
  * The config used to load the App List.
  */
-internal data class AppListConfig(
+data class AppListConfig(
     val userId: Int,
     val showInstantApps: Boolean,
 )

packages/SettingsLib/SpaPrivileged/src/com/android/settingslib/spaprivileged/template/app/AppList.kt

@@ -49,13 +49,13 @@ import kotlinx.coroutines.Dispatchers
 private const val TAG = "AppList"
 private const val CONTENT_TYPE_HEADER = "header"
 
-internal data class AppListState(
+data class AppListState(
     val showSystem: State<Boolean>,
     val option: State<Int>,
     val searchQuery: State<String>,
 )
 
-internal data class AppListInput<T : AppRecord>(
+data class AppListInput<T : AppRecord>(
     val config: AppListConfig,
     val listModel: AppListModel<T>,
     val state: AppListState,
@@ -70,10 +70,13 @@ internal data class AppListInput<T : AppRecord>(
  * This UI element will take the remaining space on the screen to show the App List.
  */
 @Composable
-internal fun <T : AppRecord> AppListInput<T>.AppList(
-    appListDataSupplier: @Composable () -> State<AppListData<T>?> = {
-        loadAppListData(config, listModel, state)
-    },
+fun <T : AppRecord> AppListInput<T>.AppList() {
+    AppListImpl { loadAppListData(config, listModel, state) }
+}
+
+@Composable
+internal fun <T : AppRecord> AppListInput<T>.AppListImpl(
+    appListDataSupplier: @Composable () -> State<AppListData<T>?>,
 ) {
     LogCompositions(TAG, config.userId.toString())
     val appListData = appListDataSupplier()

packages/SettingsLib/SpaPrivileged/src/com/android/settingslib/spaprivileged/template/app/AppListItem.kt

@@ -28,7 +28,7 @@ import com.android.settingslib.spa.widget.preference.Preference
 import com.android.settingslib.spa.widget.preference.PreferenceModel
 import com.android.settingslib.spaprivileged.model.app.AppRecord
 
-class AppListItemModel<T : AppRecord>(
+data class AppListItemModel<T : AppRecord>(
     val record: T,
     val label: String,
     val summary: State<String>,

packages/SettingsLib/SpaPrivileged/src/com/android/settingslib/spaprivileged/template/app/AppListPage.kt

@@ -47,23 +47,8 @@ fun <T : AppRecord> AppListPage(
     primaryUserOnly: Boolean = false,
     moreOptions: @Composable MoreOptionsScope.() -> Unit = {},
     header: @Composable () -> Unit = {},
+    appList: @Composable AppListInput<T>.() -> Unit = { AppList() },
     appItem: @Composable AppListItemModel<T>.() -> Unit,
-) {
-    AppListPageImpl(
-        title, listModel, showInstantApps, primaryUserOnly, moreOptions, header, appItem,
-    ) { it.AppList() }
-}
-
-@Composable
-internal fun <T : AppRecord> AppListPageImpl(
-    title: String,
-    listModel: AppListModel<T>,
-    showInstantApps: Boolean = false,
-    primaryUserOnly: Boolean = false,
-    moreOptions: @Composable MoreOptionsScope.() -> Unit = {},
-    header: @Composable () -> Unit = {},
-    appItem: @Composable AppListItemModel<T>.() -> Unit,
-    appList: @Composable (input: AppListInput<T>) -> Unit,
 ) {
     val showSystem = rememberSaveable { mutableStateOf(false) }
     SearchScaffold(

packages/SettingsLib/SpaPrivileged/tests/src/com/android/settingslib/spaprivileged/template/app/AppListPageTest.kt

@@ -118,12 +118,12 @@ class AppListPageTest {
     ): State<AppListInput<TestAppRecord>?> {
         val appListState = mutableStateOf<AppListInput<TestAppRecord>?>(null)
         composeTestRule.setContent {
-            AppListPageImpl(
+            AppListPage(
                 title = TITLE,
                 listModel = TestAppListModel(options),
                 header = header,
                 appItem = { AppListItem {} },
-                appList = { appListState.value = it },
+                appList = { appListState.value = this },
             )
         }
         return appListState

packages/SettingsLib/SpaPrivileged/tests/src/com/android/settingslib/spaprivileged/template/app/AppListTest.kt

@@ -102,7 +102,7 @@ class AppListTest {
                 appItem = { AppListItem {} },
                 bottomPadding = 0.dp,
             )
-            appListInput.AppList { stateOf(AppListData(appEntries, option = 0)) }
+            appListInput.AppListImpl { stateOf(AppListData(appEntries, option = 0)) }
         }
     }