libraries/screenshot/src/main/java/platform/test/screenshot/TestAppComponentFactory.kt

/*
 * 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 platform.test.screenshot

import android.app.Activity
import android.content.Intent
import androidx.core.app.AppComponentFactory

class TestAppComponentFactory : AppComponentFactory() {

    init {
        instance = this
    }

    private val overrides: MutableMap<String, () -> Activity> = hashMapOf()

    fun clearOverrides() {
        overrides.clear()
    }

    fun <T : Activity> registerActivityOverride(activity: Class<T>, provider: () -> T) {
        overrides[activity.name] = provider
    }

    override fun instantiateActivityCompat(
        cl: ClassLoader,
        className: String,
        intent: Intent?
    ): Activity {
        return overrides
            .getOrDefault(className) { super.instantiateActivityCompat(cl, className, intent) }
            .invoke()
    }

    companion object {

        private var instance: TestAppComponentFactory? = null

        fun getInstance(): TestAppComponentFactory =
            instance
                ?: error(
                    "TestAppComponentFactory is not initialized, " +
                        "did you specify it in the manifest?"
                )
    }
}