MaybeOnErrorXTest.java

/**
 * 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 java.io.IOException;

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.processors.PublishProcessor;

public class MaybeOnErrorXTest {

    @Test
    public void onErrorReturnConst() {
        Maybe.error(new TestException())
        .onErrorReturnItem(1)
        .test()
        .assertResult(1);
    }

    @Test
    public void onErrorReturn() {
        Maybe.error(new TestException())
        .onErrorReturn(Functions.justFunction(1))
        .test()
        .assertResult(1);
    }

    @Test
    public void onErrorComplete() {
        Maybe.error(new TestException())
        .onErrorComplete()
        .test()
        .assertResult();
    }

    @Test
    public void onErrorCompleteTrue() {
        Maybe.error(new TestException())
        .onErrorComplete(Functions.alwaysTrue())
        .test()
        .assertResult();
    }

    @Test
    public void onErrorCompleteFalse() {
        Maybe.error(new TestException())
        .onErrorComplete(Functions.alwaysFalse())
        .test()
        .assertFailure(TestException.class);
    }

    @SuppressWarnings("unchecked")
    @Test
    public void onErrorReturnFunctionThrows() {
        TestHelper.assertCompositeExceptions(Maybe.error(new TestException())
        .onErrorReturn(new Function<Throwable, Object>() {
            @Override
            public Object apply(Throwable v) throws Exception {
                throw new IOException();
            }
        })
        .test(), TestException.class, IOException.class);
    }

    @SuppressWarnings("unchecked")
    @Test
    public void onErrorCompletePredicateThrows() {
        TestHelper.assertCompositeExceptions(Maybe.error(new TestException())
        .onErrorComplete(new Predicate<Throwable>() {
            @Override
            public boolean test(Throwable v) throws Exception {
                throw new IOException();
            }
        })
        .test(), TestException.class, IOException.class);
    }

    @Test
    public void onErrorResumeNext() {
        Maybe.error(new TestException())
        .onErrorResumeNext(Functions.justFunction(Maybe.just(1)))
        .test()
        .assertResult(1);
    }

    @Test
    public void onExceptionResumeNext() {
        Maybe.error(new TestException())
        .onExceptionResumeNext(Maybe.just(1))
        .test()
        .assertResult(1);
    }

    @Test
    public void onExceptionResumeNextPassthrough() {
        Maybe.error(new AssertionError())
        .onExceptionResumeNext(Maybe.just(1))
        .test()
        .assertFailure(AssertionError.class);
    }

    @SuppressWarnings("unchecked")
    @Test
    public void onErrorResumeNextFunctionThrows() {
        TestHelper.assertCompositeExceptions(Maybe.error(new TestException())
        .onErrorResumeNext(new Function<Throwable, Maybe<Object>>() {
            @Override
            public Maybe<Object> apply(Throwable v) throws Exception {
                throw new IOException();
            }
        })
        .test(), TestException.class, IOException.class);
    }

    @Test
    public void onErrorReturnSuccess() {
        Maybe.just(1)
        .onErrorReturnItem(2)
        .test()
        .assertResult(1);
    }

    @Test
    public void onErrorReturnEmpty() {
        Maybe.<Integer>empty()
        .onErrorReturnItem(2)
        .test()
        .assertResult();
    }

    @Test
    public void onErrorReturnDispose() {
        TestHelper.checkDisposed(PublishProcessor.create().singleElement().onErrorReturnItem(1));
    }

    @Test
    public void onErrorReturnDoubleOnSubscribe() {
        TestHelper.checkDoubleOnSubscribeMaybe(new Function<Maybe<Object>, MaybeSource<Object>>() {
            @Override
            public MaybeSource<Object> apply(Maybe<Object> v) throws Exception {
                return v.onErrorReturnItem(1);
            }
        });
    }

    @Test
    public void onErrorCompleteSuccess() {
        Maybe.just(1)
        .onErrorComplete()
        .test()
        .assertResult(1);
    }

    @Test
    public void onErrorCompleteEmpty() {
        Maybe.<Integer>empty()
        .onErrorComplete()
        .test()
        .assertResult();
    }

    @Test
    public void onErrorCompleteDispose() {
        TestHelper.checkDisposed(PublishProcessor.create().singleElement().onErrorComplete());
    }

    @Test
    public void onErrorCompleteDoubleOnSubscribe() {
        TestHelper.checkDoubleOnSubscribeMaybe(new Function<Maybe<Object>, MaybeSource<Object>>() {
            @Override
            public MaybeSource<Object> apply(Maybe<Object> v) throws Exception {
                return v.onErrorComplete();
            }
        });
    }

    @Test
    public void onErrorNextDispose() {
        TestHelper.checkDisposed(PublishProcessor.create().singleElement().onErrorResumeNext(Maybe.just(1)));
    }

    @Test
    public void onErrorNextDoubleOnSubscribe() {
        TestHelper.checkDoubleOnSubscribeMaybe(new Function<Maybe<Object>, MaybeSource<Object>>() {
            @Override
            public MaybeSource<Object> apply(Maybe<Object> v) throws Exception {
                return v.onErrorResumeNext(Maybe.just(1));
            }
        });
    }

    @Test
    public void onErrorNextIsAlsoError() {
        Maybe.error(new TestException("Main"))
        .onErrorResumeNext(Maybe.error(new TestException("Secondary")))
        .test()
        .assertFailureAndMessage(TestException.class, "Secondary");
    }
}