packages/SystemUI/tests/src/com/android/systemui/InstanceIdSequenceFake.kt

/*
 * Copyright (C) 2021 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

import com.android.internal.logging.InstanceId
import com.android.internal.logging.InstanceIdSequence

/**
 * Fake [InstanceId] generator.
 */
class InstanceIdSequenceFake(instanceIdMax: Int) : InstanceIdSequence(instanceIdMax) {

    /**
     * Last id used to generate a [InstanceId]. `-1` if no [InstanceId] has been generated.
     */
    var lastInstanceId = -1
        private set

    override fun newInstanceId(): InstanceId {
        if (lastInstanceId == -1 || lastInstanceId == mInstanceIdMax - 1) {
            lastInstanceId = 1
        } else {
            lastInstanceId++
        }
        return newInstanceIdInternal(lastInstanceId)
    }
}