/**
 * 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.subscriptions;

import static org.junit.Assert.*;
import static org.mockito.Mockito.*;
import static rx.subscriptions.Subscriptions.create;

import org.junit.*;

import rx.Subscription;
import rx.functions.Action0;

public class MultipleAssignmentSubscriptionTest {

    Action0 unsubscribe;
    Subscription s;

    @Before
    public void before() {
        unsubscribe = mock(Action0.class);
        s = create(unsubscribe);
    }

    @Test
    public void testNoUnsubscribeWhenReplaced() {
        MultipleAssignmentSubscription mas = new MultipleAssignmentSubscription();

        mas.set(s);
        mas.set(Subscriptions.empty());
        mas.unsubscribe();

        verify(unsubscribe, never()).call();
    }

    @Test
    public void testUnsubscribeWhenParentUnsubscribes() {
        MultipleAssignmentSubscription mas = new MultipleAssignmentSubscription();
        mas.set(s);
        mas.unsubscribe();
        mas.unsubscribe();

        verify(unsubscribe, times(1)).call();

        Assert.assertEquals(true, mas.isUnsubscribed());
    }

    @Test
    public void subscribingWhenUnsubscribedCausesImmediateUnsubscription() {
        MultipleAssignmentSubscription mas = new MultipleAssignmentSubscription();
        mas.unsubscribe();
        Subscription underlying = mock(Subscription.class);
        mas.set(underlying);
        verify(underlying).unsubscribe();
    }

    @Test
    @Ignore("This is prone to leaks")
    public void testSubscriptionRemainsAfterUnsubscribe() {
        MultipleAssignmentSubscription mas = new MultipleAssignmentSubscription();

        mas.set(s);
        mas.unsubscribe();

        Assert.assertEquals(true, mas.get() == s);
    }

    @Test
    public void subscriptionDoesntRemainAfterUnsubscribe() {
        MultipleAssignmentSubscription mas = new MultipleAssignmentSubscription();

        mas.set(s);
        mas.unsubscribe();

        assertNotEquals(s, mas.get());
        assertSame(mas.get(), Subscriptions.unsubscribed());
    }

}