src/test/java/io/reactivex/rxjava4/single/SingleSubscribeTest.java - 4.x - githubmirror/RxJava

src/test/java/io/reactivex/rxjava4/single/SingleSubscribeTest.java
236 строк7 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.single;

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

import java.io.IOException;
import java.util.List;

import org.junit.jupiter.api.Test;

import io.reactivex.rxjava4.core.*;
import io.reactivex.rxjava4.disposables.Disposable;
import io.reactivex.rxjava4.exceptions.*;
import io.reactivex.rxjava4.functions.BiConsumer;
import io.reactivex.rxjava4.internal.functions.Functions;
import io.reactivex.rxjava4.plugins.RxJavaPlugins;
import io.reactivex.rxjava4.subjects.PublishSubject;
import io.reactivex.rxjava4.testsupport.TestHelper;

public class SingleSubscribeTest extends RxJavaTest {

    @Test
    public void consumer() {
        final Integer[] value = { null };

        Single.just(1).subscribe(v -> value[0] = v);

        assertEquals((Integer)1, value[0]);
    }

    @Test
    public void biconsumer() {
        final Object[] value = { null, null };

        Single.just(1).subscribe((v, e) -> {
            value[0] = v;
            value[1] = e;
        });

        assertEquals(1, value[0]);
        assertNull(value[1]);
    }

    @Test
    public void biconsumerError() {
        final Object[] value = { null, null };

        TestException ex = new TestException();

        Single.error(ex).subscribe((v, e) -> {
            value[0] = v;
            value[1] = e;
        });

        assertNull(value[0]);
        assertEquals(ex, value[1]);
    }

    @Test
    public void subscribeThrows() {
        try {
            new Single<Integer>() /* NFI */ {
                @Override
                protected void subscribeActual(SingleObserver<? super Integer> observer) {
                    throw new IllegalArgumentException();
                }
            }.test();
        } catch (NullPointerException ex) {
            if (!(ex.getCause() instanceof IllegalArgumentException)) {
                fail(ex.toString() + ": should have thrown NPE(IAE)");
            }
        }
    }

    @Test
    public void biConsumerDispose() {
        PublishSubject<Integer> ps = PublishSubject.create();

        Disposable d = ps.single(-99).subscribe((BiConsumer<Object, Object>) (_, _) -> {

        });

        assertFalse(d.isDisposed());

        d.dispose();

        assertTrue(d.isDisposed());

        assertFalse(ps.hasObservers());
    }

    @Test
    public void consumerDispose() {
        PublishSubject<Integer> ps = PublishSubject.create();

        Disposable d = ps.single(-99).subscribe(Functions.<Integer>emptyConsumer());

        assertFalse(d.isDisposed());

        d.dispose();

        assertTrue(d.isDisposed());

        assertFalse(ps.hasObservers());
    }

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

        try {
            Single.just(1).subscribe(_ -> {
                throw new TestException();
            });

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

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

        try {
            Single.<Integer>error(new TestException("Outer failure")).subscribe(
            Functions.<Integer>emptyConsumer(),
                    _ -> {
                        throw new TestException("Inner failure");
                    });

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

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

        try {
            Single.just(1).subscribe((_, _) -> {
                throw new TestException();
            });

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

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

        try {
            Single.<Integer>error(new TestException("Outer failure")).subscribe(
                    (_, _) -> {
                        throw new TestException("Inner failure");
                    });

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

    @Test
    public void methodTestNoCancel() {
        PublishSubject<Integer> ps = PublishSubject.create();

        ps.single(-99).test(false);

        assertTrue(ps.hasObservers());
    }

    @Test
    public void successIsDisposed() {
        assertTrue(Single.just(1).subscribe().isDisposed());
    }

    @Test
    public void errorIsDisposed() {
        assertTrue(Single.error(new TestException()).subscribe(Functions.emptyConsumer(), Functions.emptyConsumer()).isDisposed());
    }

    @Test
    public void biConsumerIsDisposedOnSuccess() {
        final Object[] result = { null, null };

        Disposable d = Single.just(1)
        .subscribe((t1, t2) -> {
            result[0] = t1;
            result[1] = t2;
        });

        assertTrue(d.isDisposed(), "Not disposed?!");
        assertEquals(1, result[0]);
        assertNull(result[1]);
    }

    @Test
    public void biConsumerIsDisposedOnError() {
        final Object[] result = { null, null };

        Disposable d = Single.<Integer>error(new IOException())
        .subscribe((t1, t2) -> {
            result[0] = t1;
            result[1] = t2;
        });

        assertTrue(d.isDisposed(), "Not disposed?!");
        assertNull(result[0]);
        assertTrue(result[1] instanceof IOException, "" + result[1]);
    }
}