/*
 * 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.rxjava4.maybe;

import static org.junit.Assert.assertTrue;

import java.util.List;

import org.junit.Test;

import io.reactivex.rxjava4.core.*;
import io.reactivex.rxjava4.disposables.*;
import io.reactivex.rxjava4.exceptions.TestException;
import io.reactivex.rxjava4.functions.Cancellable;
import io.reactivex.rxjava4.plugins.RxJavaPlugins;
import io.reactivex.rxjava4.testsupport.TestHelper;

public class MaybeCreateTest extends RxJavaTest {
    @Test
    public void basic() {
        List<Throwable> errors = TestHelper.trackPluginErrors();
        try {
            final Disposable d = Disposable.empty();

            Maybe.<Integer>create(new MaybeOnSubscribe<Integer>() {
                @Override
                public void subscribe(MaybeEmitter<Integer> e) throws Exception {
                    e.setDisposable(d);

                    e.onSuccess(1);
                    e.onError(new TestException());
                    e.onSuccess(2);
                    e.onError(new TestException());
                }
            }).test().assertResult(1);

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

    @Test
    public void basicWithCancellable() {
        List<Throwable> errors = TestHelper.trackPluginErrors();
        try {
            final Disposable d1 = Disposable.empty();
            final Disposable d2 = Disposable.empty();

            Maybe.<Integer>create(new MaybeOnSubscribe<Integer>() {
                @Override
                public void subscribe(MaybeEmitter<Integer> e) throws Exception {
                    e.setDisposable(d1);
                    e.setCancellable(new Cancellable() {
                        @Override
                        public void cancel() throws Exception {
                            d2.dispose();
                        }
                    });

                    e.onSuccess(1);
                    e.onError(new TestException());
                    e.onSuccess(2);
                    e.onError(new TestException());
                }
            }).test().assertResult(1);

            assertTrue(d1.isDisposed());
            assertTrue(d2.isDisposed());

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

    @Test
    public void basicWithError() {
        List<Throwable> errors = TestHelper.trackPluginErrors();
        try {
            final Disposable d = Disposable.empty();

            Maybe.<Integer>create(new MaybeOnSubscribe<Integer>() {
                @Override
                public void subscribe(MaybeEmitter<Integer> e) throws Exception {
                    e.setDisposable(d);

                    e.onError(new TestException());
                    e.onSuccess(2);
                    e.onError(new TestException());
                }
            }).test().assertFailure(TestException.class);

            assertTrue(d.isDisposed());

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

    @Test
    public void basicWithCompletion() {
        List<Throwable> errors = TestHelper.trackPluginErrors();
        try {
            final Disposable d = Disposable.empty();

            Maybe.<Integer>create(new MaybeOnSubscribe<Integer>() {
                @Override
                public void subscribe(MaybeEmitter<Integer> e) throws Exception {
                    e.setDisposable(d);

                    e.onComplete();
                    e.onSuccess(2);
                    e.onError(new TestException());
                }
            }).test().assertComplete();

            assertTrue(d.isDisposed());

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

    @Test(expected = IllegalArgumentException.class)
    public void unsafeCreate() {
        Maybe.unsafeCreate(Maybe.just(1));
    }
}
