[Catalyst] Add test rule for settings store

/*

 * Copyright (C) 2025 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.testutils

import com.android.settingslib.datastore.SettingsGlobalStore

import com.android.settingslib.datastore.SettingsSecureStore

import com.android.settingslib.datastore.SettingsSystemStore

import org.junit.rules.TestWatcher

import org.junit.runner.Description

/**

 * Test rule for settings stores.

 *

 * Settings stores are singletons and should be reset, otherwise the observers might not be notified

 * as expected.

 */

class SettingsStoreRule : TestWatcher() {

    override fun starting(description: Description) {

        SettingsGlobalStore.reset()

        SettingsSecureStore.reset()

        SettingsSystemStore.reset()

    }

}