/**
 * Copyright (c) 2016-present, RxJava Contributors.
 *
 * 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 io.reactivex.internal.operators.maybe;

import static org.junit.Assert.*;

import java.util.*;

import org.junit.Test;

import io.reactivex.*;
import io.reactivex.exceptions.TestException;
import io.reactivex.functions.*;
import io.reactivex.internal.functions.Functions;
import io.reactivex.observers.TestObserver;
import io.reactivex.plugins.RxJavaPlugins;
import io.reactivex.subjects.PublishSubject;

public class MaybeDoAfterSuccessTest {

    final List<Integer> values = new ArrayList<Integer>();

    final Consumer<Integer> afterSuccess = new Consumer<Integer>() {
        @Override
        public void accept(Integer e) throws Exception {
            values.add(-e);
        }
    };

    final TestObserver<Integer> to = new TestObserver<Integer>() {
        @Override
        public void onNext(Integer t) {
            super.onNext(t);
            MaybeDoAfterSuccessTest.this.values.add(t);
        }
    };

    @Test
    public void just() {
        Maybe.just(1)
        .doAfterSuccess(afterSuccess)
        .subscribeWith(to)
        .assertResult(1);

        assertEquals(Arrays.asList(1, -1), values);
    }

    @Test
    public void error() {
        Maybe.<Integer>error(new TestException())
        .doAfterSuccess(afterSuccess)
        .subscribeWith(to)
        .assertFailure(TestException.class);

        assertTrue(values.isEmpty());
    }

    @Test
    public void empty() {
        Maybe.<Integer>empty()
        .doAfterSuccess(afterSuccess)
        .subscribeWith(to)
        .assertResult();

        assertTrue(values.isEmpty());
    }

    @Test(expected = NullPointerException.class)
    public void consumerNull() {
        Maybe.just(1).doAfterSuccess(null);
    }

    @Test
    public void justConditional() {
        Maybe.just(1)
        .doAfterSuccess(afterSuccess)
        .filter(Functions.alwaysTrue())
        .subscribeWith(to)
        .assertResult(1);

        assertEquals(Arrays.asList(1, -1), values);
    }

    @Test
    public void errorConditional() {
        Maybe.<Integer>error(new TestException())
        .doAfterSuccess(afterSuccess)
        .filter(Functions.alwaysTrue())
        .subscribeWith(to)
        .assertFailure(TestException.class);

        assertTrue(values.isEmpty());
    }

    @Test
    public void emptyConditional() {
        Maybe.<Integer>empty()
        .doAfterSuccess(afterSuccess)
        .filter(Functions.alwaysTrue())
        .subscribeWith(to)
        .assertResult();

        assertTrue(values.isEmpty());
    }

    @Test
    public void consumerThrows() {
        List<Throwable> errors = TestHelper.trackPluginErrors();
        try {
            Maybe.just(1)
            .doAfterSuccess(new Consumer<Integer>() {
                @Override
                public void accept(Integer e) throws Exception {
                    throw new TestException();
                }
            })
            .test()
            .assertResult(1);

            TestHelper.assertUndeliverable(errors, 0, TestException.class);
        } finally {
            RxJavaPlugins.reset();
        }
    }

    @Test
    public void dispose() {
        TestHelper.checkDisposed(PublishSubject.<Integer>create().singleElement().doAfterSuccess(afterSuccess));
    }

    @Test
    public void doubleOnSubscribe() {
        TestHelper.checkDoubleOnSubscribeMaybe(new Function<Maybe<Integer>, MaybeSource<Integer>>() {
            @Override
            public MaybeSource<Integer> apply(Maybe<Integer> m) throws Exception {
                return m.doAfterSuccess(afterSuccess);
            }
        });
    }
}
