/*

 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

import jdk.test.lib.util.FileUtils;

import org.testng.annotations.Test;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.net.http.HttpRequest.BodyPublisher;

import java.net.http.HttpRequest.BodyPublishers;

import java.nio.ByteBuffer;

import java.nio.file.Files;

import java.nio.file.Path;

import java.util.ArrayList;

import java.util.List;

import java.util.concurrent.CompletableFuture;

import java.util.concurrent.Flow;

import static org.testng.Assert.assertEquals;

/*

 * @test

 * @summary Verifies that some of the standard BodyPublishers relay exception

 *          rather than throw it

 * @bug 8226303

 * @library /test/lib

 * @run testng/othervm RelayingPublishers

 */

public class RelayingPublishers {

    @Test

    public void ofFile0() throws IOException {

        Path directory = Files.createDirectory(Path.of("d"));

        // Even though the path exists, the publisher should not be able

        // to read from it, as that path denotes a directory, not a file

        BodyPublisher pub = BodyPublishers.ofFile(directory);

        CompletableSubscriber<ByteBuffer> s = new CompletableSubscriber<>();

        pub.subscribe(s);

        s.future().join();

        // Interestingly enough, it's FileNotFoundException if a file

        // is a directory

        assertEquals(s.future().join().getClass(), FileNotFoundException.class);

    }

    @Test

    public void ofFile1() throws IOException {

        Path file = Files.createFile(Path.of("f"));

        BodyPublisher pub = BodyPublishers.ofFile(file);

        FileUtils.deleteFileWithRetry(file);

        CompletableSubscriber<ByteBuffer> s = new CompletableSubscriber<>();

        pub.subscribe(s);

        assertEquals(s.future().join().getClass(), FileNotFoundException.class);

    }

    @Test

    public void ofByteArrays() {

        List<byte[]> bytes = new ArrayList<>();

        bytes.add(null);

        BodyPublisher pub = BodyPublishers.ofByteArrays(bytes);

        CompletableSubscriber<ByteBuffer> s = new CompletableSubscriber<>();

        pub.subscribe(s);

        assertEquals(s.future().join().getClass(), NullPointerException.class);

    }

    static class CompletableSubscriber<T> implements Flow.Subscriber<T> {

        final CompletableFuture<Throwable> f = new CompletableFuture<>();

        @Override

        public void onSubscribe(Flow.Subscription subscription) {

            subscription.request(1);

        }

        @Override

        public void onNext(T item) {

            f.completeExceptionally(new RuntimeException("Unexpected onNext"));

        }

        @Override

        public void onError(Throwable throwable) {

            f.complete(throwable);

        }

        @Override

        public void onComplete() {

            f.completeExceptionally(new RuntimeException("Unexpected onNext"));

        }

        CompletableFuture<Throwable> future() {

            return f.copy();

        }

    }

}