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

src/test/java/io/reactivex/rxjava4/internal/subscribers/StrictSubscriberTest.java
330 строк9 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 java.util.concurrent.Flow.*;

import org.junit.jupiter.api.Test;

import io.reactivex.rxjava4.core.*;
import io.reactivex.rxjava4.exceptions.TestException;
import io.reactivex.rxjava4.internal.subscriptions.BooleanSubscription;
import io.reactivex.rxjava4.testsupport.TestSubscriberEx;

public class StrictSubscriberTest extends RxJavaTest {

    @Test
    public void strictMode() {
        final List<Object> list = new ArrayList<>();
        var sub = new Subscriber<>() /* NFI */ {

            @Override
            public void onSubscribe(Subscription s) {
                s.request(10);
            }

            @Override
            public void onNext(Object t) {
                list.add(t);
            }

            @Override
            public void onError(Throwable t) {
                list.add(t);
            }

            @Override
            public void onComplete() {
                list.add("Done");
            }
        };

        new Flowable<>() /* NFI */ {
            @Override
            protected void subscribeActual(Subscriber<? super Object> s) {
                s.onSubscribe(new BooleanSubscription());
                s.onNext(s);
            }
        }.subscribe(sub);

        assertTrue(list.getFirst() instanceof StrictSubscriber, list.toString());
    }

    record SubscriberWrapper<T>(TestSubscriberEx<T> tester) implements Subscriber<T> {

        @Override
            public void onSubscribe(Subscription s) {
                tester.onSubscribe(s);
            }

            @Override
            public void onNext(T t) {
                tester.onNext(t);
            }

            @Override
            public void onError(Throwable t) {
                tester.onError(t);
            }

            @Override
            public void onComplete() {
                tester.onComplete();
            }
        }

    @Test
    public void normalOnNext() {
        TestSubscriberEx<Integer> ts = new TestSubscriberEx<>();
        SubscriberWrapper<Integer> wrapper = new SubscriberWrapper<>(ts);

        Flowable.range(1, 5).subscribe(wrapper);

        ts.assertResult(1, 2, 3, 4, 5);
    }

    @Test
    public void normalOnNextBackpressured() {
        TestSubscriberEx<Integer> ts = new TestSubscriberEx<>(0);
        SubscriberWrapper<Integer> wrapper = new SubscriberWrapper<>(ts);

        Flowable.range(1, 5).subscribe(wrapper);

        ts.assertEmpty()
        .requestMore(1)
        .assertValue(1)
        .requestMore(2)
        .assertValues(1, 2, 3)
        .requestMore(2)
        .assertResult(1, 2, 3, 4, 5);
    }

    @Test
    public void normalOnError() {
        TestSubscriberEx<Integer> ts = new TestSubscriberEx<>();
        SubscriberWrapper<Integer> wrapper = new SubscriberWrapper<>(ts);

        Flowable.range(1, 5).concatWith(Flowable.<Integer>error(new TestException()))
        .subscribe(wrapper);

        ts.assertFailure(TestException.class, 1, 2, 3, 4, 5);
    }

    @Test
    public void deferredRequest() {
        final List<Object> list = new ArrayList<>();
        var sub = new Subscriber<>() /* NFI */ {

            @Override
            public void onSubscribe(Subscription s) {
                s.request(5);
                list.add(0);
            }

            @Override
            public void onNext(Object t) {
                list.add(t);
            }

            @Override
            public void onError(Throwable t) {
                list.add(t);
            }

            @Override
            public void onComplete() {
                list.add("Done");
            }
        };

        Flowable.range(1, 5).subscribe(sub);

        assertEquals(Arrays.<Object>asList(0, 1, 2, 3, 4, 5, "Done"), list);
    }

    @Test
    public void requestZero() {
        final List<Object> list = new ArrayList<>();
        var sub = new Subscriber<>() /* NFI */ {

            @Override
            public void onSubscribe(Subscription s) {
                s.request(0);
            }

            @Override
            public void onNext(Object t) {
                list.add(t);
            }

            @Override
            public void onError(Throwable t) {
                list.add(t);
            }

            @Override
            public void onComplete() {
                list.add("Done");
            }
        };

        Flowable.range(1, 5).subscribe(sub);

        assertTrue(list.getFirst() instanceof IllegalArgumentException, list.toString());
        assertTrue(list.getFirst().toString().contains("3.9"), list.toString());
    }

    @Test
    public void requestNegative() {
        final List<Object> list = new ArrayList<>();
        var sub = new Subscriber<>() /* NFI */ {

            @Override
            public void onSubscribe(Subscription s) {
                s.request(-99);
            }

            @Override
            public void onNext(Object t) {
                list.add(t);
            }

            @Override
            public void onError(Throwable t) {
                list.add(t);
            }

            @Override
            public void onComplete() {
                list.add("Done");
            }
        };

        Flowable.range(1, 5).subscribe(sub);

        assertTrue(list.getFirst() instanceof IllegalArgumentException, list.toString());
        assertTrue(list.getFirst().toString().contains("3.9"), list.toString());
    }

    @Test
    public void cancelAfterOnComplete() {
        final List<Object> list = new ArrayList<>();
        var sub = new Subscriber<>() /* NFI */ {

            Subscription upstream;

            @Override
            public void onSubscribe(Subscription s) {
                this.upstream = s;
            }

            @Override
            public void onNext(Object t) {
                list.add(t);
            }

            @Override
            public void onError(Throwable t) {
                upstream.cancel();
                list.add(t);
            }

            @Override
            public void onComplete() {
                upstream.cancel();
                list.add("Done");
            }
        };

        new Flowable<>() /* NFI */ {
            @Override
            protected void subscribeActual(Subscriber<? super Object> s) {
                BooleanSubscription b = new BooleanSubscription();
                s.onSubscribe(b);
                s.onComplete();
                list.add(b.isCancelled());
            }
        }.subscribe(sub);

        assertEquals(Arrays.<Object>asList("Done", false), list);
    }

    @Test
    public void cancelAfterOnError() {
        final List<Object> list = new ArrayList<>();
        var sub = new Subscriber<>() /* NFI */ {

            Subscription upstream;
            @Override
            public void onSubscribe(Subscription s) {
                this.upstream = s;
            }

            @Override
            public void onNext(Object t) {
                list.add(t);
            }

            @Override
            public void onError(Throwable t) {
                upstream.cancel();
                list.add(t.getMessage());
            }

            @Override
            public void onComplete() {
                upstream.cancel();
                list.add("Done");
            }
        };

        new Flowable<>() /* NFI */ {
            @Override
            protected void subscribeActual(Subscriber<? super Object> s) {
                BooleanSubscription b = new BooleanSubscription();
                s.onSubscribe(b);
                s.onError(new TestException("Forced failure"));
                list.add(b.isCancelled());
            }
        }.subscribe(sub);

        assertEquals(Arrays.<Object>asList("Forced failure", false), list);
    }

    @Test
    public void doubleOnSubscribe() {
        TestSubscriberEx<Integer> ts = new TestSubscriberEx<>();
        SubscriberWrapper<Integer> wrapper = new SubscriberWrapper<>(ts);

        new Flowable<Integer>() /* NFI */ {
            @Override
            protected void subscribeActual(Subscriber<? super Integer> s) {
                BooleanSubscription b1 = new BooleanSubscription();
                s.onSubscribe(b1);

                BooleanSubscription b2 = new BooleanSubscription();
                s.onSubscribe(b2);

                assertTrue(b1.isCancelled());
                assertTrue(b2.isCancelled());
            }
        }.subscribe(wrapper);

        ts.assertFailure(IllegalStateException.class);
        assertTrue(ts.errors().getFirst().getMessage().contains("2.12"), ts.errors().toString());
    }
}