/*
 * 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.server.nearby.common;

import static com.google.common.truth.Truth.assertThat;

import org.junit.Test;

import java.util.concurrent.atomic.AtomicInteger;

public class CancellationFlagTest {

    @Test
    public void initialValueIsFalse() {
        assertThat(new CancellationFlag().isCancelled()).isFalse();
    }

    @Test
    public void cancel() {
        CancellationFlag flag = new CancellationFlag();
        flag.cancel();
        assertThat(flag.isCancelled()).isTrue();
    }

    @Test
    public void cancelShouldOnlyCancelOnce() {
        CancellationFlag flag = new CancellationFlag();
        AtomicInteger record = new AtomicInteger();

        flag.registerOnCancelListener(() -> record.incrementAndGet());
        for (int i = 0; i < 3; i++) {
            flag.cancel();
        }

        assertThat(flag.isCancelled()).isTrue();
        assertThat(record.get()).isEqualTo(1);
    }
}
