src/test/java/io/reactivex/rxjava4/internal/subscribers/LambdaSubscriberTest.java - 4.x - githubmirror/RxJava

src/test/java/io/reactivex/rxjava4/internal/subscribers/LambdaSubscriberTest.java
233 строки8 KB
David Karnok
4.x: Convert from JUnit 4 to JUnit 6 (#8202)
30 июн 2026, 12:01
30 июн 2026, 12:01531388f
/*
 * 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.internal.subscribers;

import static org.junit.jupiter.api.Assertions.*;

import java.util.*;

import org.junit.jupiter.api.Test;

import io.reactivex.rxjava4.core.*;
import io.reactivex.rxjava4.exceptions.*;
import io.reactivex.rxjava4.internal.functions.Functions;
import io.reactivex.rxjava4.internal.operators.flowable.FlowableInternalHelper;
import io.reactivex.rxjava4.internal.subscriptions.BooleanSubscription;
import io.reactivex.rxjava4.plugins.RxJavaPlugins;
import io.reactivex.rxjava4.processors.PublishProcessor;
import io.reactivex.rxjava4.testsupport.*;

public class LambdaSubscriberTest extends RxJavaTest {

    @Test
    public void onSubscribeThrows() {
        final List<Object> received = new ArrayList<>();

        LambdaSubscriber<Object> subscriber = new LambdaSubscriber<>(received::add,
                received::add, () -> received.add(100), _ -> {
                    throw new TestException();
                });

        assertFalse(subscriber.isDisposed());

        Flowable.just(1).subscribe(subscriber);

        assertTrue(received.getFirst() instanceof TestException, received.toString());
        assertEquals(1, received.size(), received.toString());

        assertTrue(subscriber.isDisposed());
    }

    @Test
    public void onNextThrows() {
        final List<Object> received = new ArrayList<>();

        LambdaSubscriber<Object> subscriber = new LambdaSubscriber<>(_ -> {
            throw new TestException();
        },
                received::add, () -> received.add(100), s -> s.request(Long.MAX_VALUE));

        assertFalse(subscriber.isDisposed());

        Flowable.just(1).subscribe(subscriber);

        assertTrue(received.getFirst() instanceof TestException, received.toString());
        assertEquals(1, received.size(), received.toString());

        assertTrue(subscriber.isDisposed());
    }

    @Test
    public void onErrorThrows() {
        List<Throwable> errors = TestHelper.trackPluginErrors();

        try {
            final List<Object> received = new ArrayList<>();

            LambdaSubscriber<Object> subscriber = new LambdaSubscriber<>(received::add,
                    _ -> {
                        throw new TestException("Inner");
                    }, () -> received.add(100), s -> s.request(Long.MAX_VALUE));

            assertFalse(subscriber.isDisposed());

            Flowable.<Integer>error(new TestException("Outer")).subscribe(subscriber);

            assertTrue(received.isEmpty(), received.toString());

            assertTrue(subscriber.isDisposed());

            TestHelper.assertError(errors, 0, CompositeException.class);
            List<Throwable> ce = TestHelper.compositeList(errors.getFirst());
            TestHelper.assertError(ce, 0, TestException.class, "Outer");
            TestHelper.assertError(ce, 1, TestException.class, "Inner");
        } finally {
            RxJavaPlugins.reset();
        }
    }

    @Test
    public void onCompleteThrows() {
        List<Throwable> errors = TestHelper.trackPluginErrors();

        try {
            final List<Object> received = new ArrayList<>();

            LambdaSubscriber<Object> subscriber = new LambdaSubscriber<>(received::add,
                    received::add, () -> {
                        throw new TestException();
                    }, s -> s.request(Long.MAX_VALUE));

            assertFalse(subscriber.isDisposed());

            Flowable.<Integer>empty().subscribe(subscriber);

            assertTrue(received.isEmpty(), received.toString());

            assertTrue(subscriber.isDisposed());

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

    @Test
    public void badSourceOnSubscribe() {
        Flowable<Integer> source = Flowable.fromPublisher(s -> {
            BooleanSubscription s1 = new BooleanSubscription();
            s.onSubscribe(s1);
            BooleanSubscription s2 = new BooleanSubscription();
            s.onSubscribe(s2);

            assertFalse(s1.isCancelled());
            assertTrue(s2.isCancelled());

            s.onNext(1);
            s.onComplete();
        });

        final List<Object> received = new ArrayList<>();

        LambdaSubscriber<Object> subscriber = new LambdaSubscriber<>(received::add,
                received::add, () -> received.add(100), s -> s.request(Long.MAX_VALUE));

        source.subscribe(subscriber);

        assertEquals(Arrays.asList(1, 100), received);
    }

    @Test
    @SuppressUndeliverable
    public void badSourceEmitAfterDone() {
        Flowable<Integer> source = Flowable.fromPublisher(s -> {
            BooleanSubscription s1 = new BooleanSubscription();
            s.onSubscribe(s1);

            s.onNext(1);
            s.onComplete();
            s.onNext(2);
            s.onError(new TestException());
            s.onComplete();
        });

        final List<Object> received = new ArrayList<>();

        LambdaSubscriber<Object> subscriber = new LambdaSubscriber<>(received::add,
                received::add, () -> received.add(100), s -> s.request(Long.MAX_VALUE));

        source.subscribe(subscriber);

        assertEquals(Arrays.asList(1, 100), received);
    }

    @Test
    public void onNextThrowsCancelsUpstream() {
        PublishProcessor<Integer> pp = PublishProcessor.create();

        final List<Throwable> errors = new ArrayList<>();

        pp.subscribe(_ -> {
            throw new TestException();
        }, errors::add);

        assertTrue(pp.hasSubscribers(), "No observers?!");
        assertTrue(errors.isEmpty(), "Has errors already?!");

        pp.onNext(1);

        assertFalse(pp.hasSubscribers(), "Has observers?!");
        assertFalse(errors.isEmpty(), "No errors?!");

        assertTrue(errors.getFirst() instanceof TestException, errors.toString());
    }

    @Test
    public void onSubscribeThrowsCancelsUpstream() {
        PublishProcessor<Integer> pp = PublishProcessor.create();

        final List<Throwable> errors = new ArrayList<>();

        pp.subscribe(new LambdaSubscriber<>(_ -> {
        }, errors::add, () -> {
        }, _ -> {
            throw new TestException();
        }));

        assertFalse(pp.hasSubscribers(), "Has observers?!");
        assertFalse(errors.isEmpty(), "No errors?!");

        assertTrue(errors.getFirst() instanceof TestException, errors.toString());
    }

    @Test
    public void onErrorMissingShouldReportNoCustomOnError() {
        LambdaSubscriber<Integer> subscriber = new LambdaSubscriber<>(Functions.<Integer>emptyConsumer(),
                Functions.ON_ERROR_MISSING,
                Functions.EMPTY_ACTION,
                FlowableInternalHelper.RequestMax.INSTANCE);

        assertFalse(subscriber.hasCustomOnError());
    }

    @Test
    public void customOnErrorShouldReportCustomOnError() {
        LambdaSubscriber<Integer> subscriber = new LambdaSubscriber<>(Functions.<Integer>emptyConsumer(),
                Functions.<Throwable>emptyConsumer(),
                Functions.EMPTY_ACTION,
                FlowableInternalHelper.RequestMax.INSTANCE);

        assertTrue(subscriber.hasCustomOnError());
    }
}