/*
 * Copyright (C) 2023 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.federatedcompute.services.common;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotEquals;

import android.os.Process;
import android.os.StrictMode;

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

import org.junit.Test;
import org.junit.runner.RunWith;

import java.util.concurrent.ExecutionException;

@RunWith(AndroidJUnit4.class)
public final class FederatedComputeExecutorsTest {

    @Test
    public void testBackgroundExecutorSettings() throws InterruptedException, ExecutionException {
        Runnable task =
                () -> {
                    StrictMode.ThreadPolicy threadPolicy = StrictMode.getThreadPolicy();
                    assertNotEquals(
                            threadPolicy.toString(), StrictMode.ThreadPolicy.LAX.toString());
                    assertEquals(
                            Process.getThreadPriority(Process.myTid()),
                            Process.THREAD_PRIORITY_BACKGROUND);
                };
        FederatedComputeExecutors.getBackgroundExecutor().submit(task).get();
    }

    @Test
    public void testLightweightExecutorSettings() throws InterruptedException, ExecutionException {
        Runnable task =
                () -> {
                    StrictMode.ThreadPolicy threadPolicy = StrictMode.getThreadPolicy();
                    assertNotEquals(
                            threadPolicy.toString(), StrictMode.ThreadPolicy.LAX.toString());
                    assertEquals(
                            Process.getThreadPriority(Process.myTid()),
                            Process.THREAD_PRIORITY_DEFAULT);
                };
        FederatedComputeExecutors.getLightweightExecutor().submit(task).get();
    }

    @Test
    public void testBlockingExecutorSettings() throws InterruptedException, ExecutionException {
        Runnable task =
                () -> {
                    StrictMode.ThreadPolicy threadPolicy = StrictMode.getThreadPolicy();
                    assertEquals(threadPolicy.toString(), StrictMode.ThreadPolicy.LAX.toString());
                    assertEquals(
                            Process.getThreadPriority(Process.myTid()),
                            Process.THREAD_PRIORITY_BACKGROUND
                                    + Process.THREAD_PRIORITY_LESS_FAVORABLE);
                };
        FederatedComputeExecutors.getBlockingExecutor().submit(task).get();
    }
}