/**
 * Copyright 2014 Netflix, Inc.
 *
 * 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 rx.internal.operators;

import static org.junit.Assert.assertEquals;

import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;

import org.junit.Test;

import rx.Observable;
import rx.Observable.OnSubscribe;
import rx.Subscriber;
import rx.functions.Action0;

public class OperatorDoOnSubscribeTest {

    @Test
    public void testDoOnSubscribe() throws Exception {
        final AtomicInteger count = new AtomicInteger();
        Observable<Integer> o = Observable.just(1).doOnSubscribe(new Action0() {

            @Override
            public void call() {
                count.incrementAndGet();
            }

        });

        o.subscribe();
        o.subscribe();
        o.subscribe();
        assertEquals(3, count.get());
    }

    @Test
    public void testDoOnSubscribe2() throws Exception {
        final AtomicInteger count = new AtomicInteger();
        Observable<Integer> o = Observable.just(1).doOnSubscribe(new Action0() {

            @Override
            public void call() {
                count.incrementAndGet();
            }

        }).take(1).doOnSubscribe(new Action0() {

            @Override
            public void call() {
                count.incrementAndGet();
            }

        });

        o.subscribe();
        assertEquals(2, count.get());
    }

    @Test
    public void testDoOnUnSubscribeWorksWithRefCount() throws Exception {
        final AtomicInteger onSubscribed = new AtomicInteger();
        final AtomicInteger countBefore = new AtomicInteger();
        final AtomicInteger countAfter = new AtomicInteger();
        final AtomicReference<Subscriber<? super Integer>> sref = new AtomicReference<Subscriber<? super Integer>>();
        Observable<Integer> o = Observable.create(new OnSubscribe<Integer>() {

            @Override
            public void call(Subscriber<? super Integer> s) {
                onSubscribed.incrementAndGet();
                sref.set(s);
            }

        }).doOnSubscribe(new Action0() {

            @Override
            public void call() {
                countBefore.incrementAndGet();
            }

        }).publish().refCount().doOnSubscribe(new Action0() {

            @Override
            public void call() {
                countAfter.incrementAndGet();
            }

        });

        o.subscribe();
        o.subscribe();
        o.subscribe();
        assertEquals(1, countBefore.get());
        assertEquals(1, onSubscribed.get());
        assertEquals(3, countAfter.get());
        sref.get().onCompleted();
        o.subscribe();
        o.subscribe();
        o.subscribe();
        assertEquals(2, countBefore.get());
        assertEquals(2, onSubscribed.get());
        assertEquals(6, countAfter.get());
    }

}
